./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6826aeecba49275836b6b398765a757158a4e84d2c6569399d77f2320562875e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:07:29,657 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:07:29,662 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:07:29,709 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:07:29,709 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:07:29,713 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:07:29,716 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:07:29,720 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:07:29,723 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:07:29,730 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:07:29,731 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:07:29,733 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:07:29,733 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:07:29,736 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:07:29,739 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:07:29,743 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:07:29,745 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:07:29,747 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:07:29,749 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:07:29,759 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:07:29,761 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:07:29,762 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:07:29,766 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:07:29,767 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:07:29,776 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:07:29,776 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:07:29,776 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:07:29,777 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:07:29,778 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:07:29,779 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:07:29,780 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:07:29,781 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:07:29,782 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:07:29,784 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:07:29,786 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:07:29,786 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:07:29,787 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:07:29,787 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:07:29,787 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:07:29,788 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:07:29,789 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:07:29,790 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-23 02:07:29,837 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:07:29,839 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:07:29,840 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:07:29,840 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:07:29,841 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:07:29,841 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:07:29,842 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:07:29,842 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:07:29,842 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:07:29,842 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:07:29,844 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:07:29,844 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:07:29,844 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:07:29,844 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:07:29,845 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:07:29,845 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:07:29,845 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:07:29,845 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:07:29,846 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 02:07:29,847 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 02:07:29,847 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:07:29,847 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:07:29,847 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 02:07:29,848 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:07:29,848 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:07:29,848 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:07:29,848 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 02:07:29,849 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 02:07:29,849 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 02:07:29,849 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:07:29,849 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 02:07:29,850 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:07:29,850 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:07:29,850 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:07:29,850 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:07:29,851 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:07:29,851 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:07:29,851 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:07:29,851 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:07:29,852 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:07:29,853 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:07:29,854 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:07:29,854 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_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6826aeecba49275836b6b398765a757158a4e84d2c6569399d77f2320562875e [2021-11-23 02:07:30,210 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:07:30,240 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:07:30,243 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:07:30,244 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:07:30,245 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:07:30,246 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i [2021-11-23 02:07:30,316 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/data/71c25a80f/da4ca3236b78450fbb48f0d9dcb8fdf0/FLAG14202442b [2021-11-23 02:07:30,975 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:07:30,980 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/sv-benchmarks/c/memsafety-bftpd/bftpd_3.i [2021-11-23 02:07:31,006 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/data/71c25a80f/da4ca3236b78450fbb48f0d9dcb8fdf0/FLAG14202442b [2021-11-23 02:07:31,217 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/data/71c25a80f/da4ca3236b78450fbb48f0d9dcb8fdf0 [2021-11-23 02:07:31,222 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:07:31,225 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:07:31,229 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:07:31,229 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:07:31,234 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:07:31,235 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:07:31" (1/1) ... [2021-11-23 02:07:31,239 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a08a58b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:31, skipping insertion in model container [2021-11-23 02:07:31,239 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:07:31" (1/1) ... [2021-11-23 02:07:31,247 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:07:31,309 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:07:31,662 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:07:31,671 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:07:31,726 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:07:31,776 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:07:31,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:31 WrapperNode [2021-11-23 02:07:31,778 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:07:31,779 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:07:31,779 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:07:31,780 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:07:31,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:31" (1/1) ... [2021-11-23 02:07:31,814 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:31" (1/1) ... [2021-11-23 02:07:31,839 INFO L137 Inliner]: procedures = 168, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 95 [2021-11-23 02:07:31,843 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:07:31,844 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:07:31,845 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:07:31,845 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:07:31,853 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:31" (1/1) ... [2021-11-23 02:07:31,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:31" (1/1) ... [2021-11-23 02:07:31,862 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:31" (1/1) ... [2021-11-23 02:07:31,863 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:31" (1/1) ... [2021-11-23 02:07:31,889 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:31" (1/1) ... [2021-11-23 02:07:31,896 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:31" (1/1) ... [2021-11-23 02:07:31,898 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:31" (1/1) ... [2021-11-23 02:07:31,904 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:07:31,905 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:07:31,905 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:07:31,905 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:07:31,910 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:31" (1/1) ... [2021-11-23 02:07:31,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:07:31,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:07:31,937 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:07:31,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:07:31,980 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:07:31,981 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2021-11-23 02:07:31,981 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2021-11-23 02:07:31,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:07:31,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:07:31,981 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:07:31,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:07:31,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:07:31,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:07:31,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:07:31,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:07:32,083 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:07:32,086 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:07:32,450 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:07:32,491 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:07:32,491 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 02:07:32,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:07:32 BoogieIcfgContainer [2021-11-23 02:07:32,494 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:07:32,496 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:07:32,496 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:07:32,499 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:07:32,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:07:31" (1/3) ... [2021-11-23 02:07:32,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f7270c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:07:32, skipping insertion in model container [2021-11-23 02:07:32,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:31" (2/3) ... [2021-11-23 02:07:32,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f7270c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:07:32, skipping insertion in model container [2021-11-23 02:07:32,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:07:32" (3/3) ... [2021-11-23 02:07:32,503 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_3.i [2021-11-23 02:07:32,509 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:07:32,509 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-11-23 02:07:32,558 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:07:32,565 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:07:32,565 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-11-23 02:07:32,582 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 49 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:07:32,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-23 02:07:32,595 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:07:32,596 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-23 02:07:32,597 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)] === [2021-11-23 02:07:32,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:07:32,608 INFO L85 PathProgramCache]: Analyzing trace with hash 130425256, now seen corresponding path program 1 times [2021-11-23 02:07:32,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:07:32,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485652753] [2021-11-23 02:07:32,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:32,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:07:32,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:32,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:07:32,965 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:07:32,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485652753] [2021-11-23 02:07:32,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485652753] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:07:32,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:07:32,967 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:07:32,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655645286] [2021-11-23 02:07:32,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:07:32,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:07:32,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:07:33,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:07:33,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:07:33,009 INFO L87 Difference]: Start difference. First operand has 54 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 49 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:07:33,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:07:33,155 INFO L93 Difference]: Finished difference Result 106 states and 123 transitions. [2021-11-23 02:07:33,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:07:33,157 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 [2021-11-23 02:07:33,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:07:33,167 INFO L225 Difference]: With dead ends: 106 [2021-11-23 02:07:33,168 INFO L226 Difference]: Without dead ends: 103 [2021-11-23 02:07:33,169 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 [2021-11-23 02:07:33,173 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 122 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:07:33,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 84 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:07:33,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-23 02:07:33,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 76. [2021-11-23 02:07:33,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 66 states have internal predecessors, (84), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-23 02:07:33,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 102 transitions. [2021-11-23 02:07:33,224 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 102 transitions. Word has length 5 [2021-11-23 02:07:33,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:07:33,225 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 102 transitions. [2021-11-23 02:07:33,225 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) [2021-11-23 02:07:33,226 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 102 transitions. [2021-11-23 02:07:33,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-23 02:07:33,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:07:33,227 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-23 02:07:33,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:07:33,227 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)] === [2021-11-23 02:07:33,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:07:33,228 INFO L85 PathProgramCache]: Analyzing trace with hash 130425257, now seen corresponding path program 1 times [2021-11-23 02:07:33,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:07:33,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157066172] [2021-11-23 02:07:33,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:33,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:07:33,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:33,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:07:33,409 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:07:33,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157066172] [2021-11-23 02:07:33,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157066172] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:07:33,410 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:07:33,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:07:33,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32839505] [2021-11-23 02:07:33,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:07:33,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:07:33,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:07:33,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:07:33,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:07:33,414 INFO L87 Difference]: Start difference. First operand 76 states and 102 transitions. Second operand has 5 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:07:33,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:07:33,568 INFO L93 Difference]: Finished difference Result 198 states and 266 transitions. [2021-11-23 02:07:33,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:07:33,569 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 [2021-11-23 02:07:33,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:07:33,572 INFO L225 Difference]: With dead ends: 198 [2021-11-23 02:07:33,572 INFO L226 Difference]: Without dead ends: 198 [2021-11-23 02:07:33,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:07:33,574 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 134 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:07:33,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 171 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:07:33,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-23 02:07:33,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 147. [2021-11-23 02:07:33,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 113 states have (on average 1.7079646017699115) internal successors, (193), 130 states have internal predecessors, (193), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2021-11-23 02:07:33,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 229 transitions. [2021-11-23 02:07:33,609 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 229 transitions. Word has length 5 [2021-11-23 02:07:33,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:07:33,609 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 229 transitions. [2021-11-23 02:07:33,609 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) [2021-11-23 02:07:33,616 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 229 transitions. [2021-11-23 02:07:33,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 02:07:33,617 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:07:33,617 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 02:07:33,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:07:33,617 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)] === [2021-11-23 02:07:33,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:07:33,618 INFO L85 PathProgramCache]: Analyzing trace with hash -251784379, now seen corresponding path program 1 times [2021-11-23 02:07:33,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:07:33,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401635044] [2021-11-23 02:07:33,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:33,620 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:07:33,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:33,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:07:33,887 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:07:33,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401635044] [2021-11-23 02:07:33,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401635044] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:07:33,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:07:33,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:07:33,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804525171] [2021-11-23 02:07:33,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:07:33,890 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:07:33,890 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:07:33,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:07:33,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:07:33,892 INFO L87 Difference]: Start difference. First operand 147 states and 229 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:07:34,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:07:34,099 INFO L93 Difference]: Finished difference Result 220 states and 317 transitions. [2021-11-23 02:07:34,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:07:34,100 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 [2021-11-23 02:07:34,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:07:34,104 INFO L225 Difference]: With dead ends: 220 [2021-11-23 02:07:34,105 INFO L226 Difference]: Without dead ends: 220 [2021-11-23 02:07:34,105 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:07:34,113 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 84 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:07:34,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 141 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:07:34,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-11-23 02:07:34,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 150. [2021-11-23 02:07:34,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 116 states have (on average 1.6896551724137931) internal successors, (196), 133 states have internal predecessors, (196), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2021-11-23 02:07:34,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 232 transitions. [2021-11-23 02:07:34,152 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 232 transitions. Word has length 6 [2021-11-23 02:07:34,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:07:34,153 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 232 transitions. [2021-11-23 02:07:34,153 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) [2021-11-23 02:07:34,153 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 232 transitions. [2021-11-23 02:07:34,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 02:07:34,154 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:07:34,154 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:07:34,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:07:34,154 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)] === [2021-11-23 02:07:34,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:07:34,156 INFO L85 PathProgramCache]: Analyzing trace with hash 784618888, now seen corresponding path program 1 times [2021-11-23 02:07:34,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:07:34,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912173452] [2021-11-23 02:07:34,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:34,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:07:34,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:34,388 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:07:34,389 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:07:34,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912173452] [2021-11-23 02:07:34,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912173452] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:07:34,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:07:34,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:07:34,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314305619] [2021-11-23 02:07:34,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:07:34,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:07:34,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:07:34,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:07:34,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:07:34,394 INFO L87 Difference]: Start difference. First operand 150 states and 232 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:07:34,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:07:34,527 INFO L93 Difference]: Finished difference Result 200 states and 267 transitions. [2021-11-23 02:07:34,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:07:34,528 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 [2021-11-23 02:07:34,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:07:34,531 INFO L225 Difference]: With dead ends: 200 [2021-11-23 02:07:34,531 INFO L226 Difference]: Without dead ends: 200 [2021-11-23 02:07:34,532 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 [2021-11-23 02:07:34,543 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 136 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:07:34,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 161 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:07:34,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-23 02:07:34,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 150. [2021-11-23 02:07:34,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 116 states have (on average 1.6724137931034482) internal successors, (194), 133 states have internal predecessors, (194), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2021-11-23 02:07:34,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 230 transitions. [2021-11-23 02:07:34,588 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 230 transitions. Word has length 7 [2021-11-23 02:07:34,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:07:34,588 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 230 transitions. [2021-11-23 02:07:34,589 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) [2021-11-23 02:07:34,589 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 230 transitions. [2021-11-23 02:07:34,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 02:07:34,589 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:07:34,589 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:07:34,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:07:34,590 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)] === [2021-11-23 02:07:34,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:07:34,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1446618201, now seen corresponding path program 1 times [2021-11-23 02:07:34,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:07:34,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115340203] [2021-11-23 02:07:34,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:34,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:07:34,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:34,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:07:34,674 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:07:34,674 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115340203] [2021-11-23 02:07:34,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115340203] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:07:34,674 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:07:34,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:07:34,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611574507] [2021-11-23 02:07:34,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:07:34,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:07:34,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:07:34,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:07:34,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:07:34,677 INFO L87 Difference]: Start difference. First operand 150 states and 230 transitions. Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:07:34,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:07:34,775 INFO L93 Difference]: Finished difference Result 227 states and 313 transitions. [2021-11-23 02:07:34,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:07:34,776 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 [2021-11-23 02:07:34,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:07:34,782 INFO L225 Difference]: With dead ends: 227 [2021-11-23 02:07:34,782 INFO L226 Difference]: Without dead ends: 227 [2021-11-23 02:07:34,782 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 [2021-11-23 02:07:34,783 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 111 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:07:34,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 144 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:07:34,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-11-23 02:07:34,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 178. [2021-11-23 02:07:34,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 142 states have (on average 1.6408450704225352) internal successors, (233), 160 states have internal predecessors, (233), 10 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2021-11-23 02:07:34,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 269 transitions. [2021-11-23 02:07:34,810 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 269 transitions. Word has length 8 [2021-11-23 02:07:34,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:07:34,811 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 269 transitions. [2021-11-23 02:07:34,811 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) [2021-11-23 02:07:34,811 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 269 transitions. [2021-11-23 02:07:34,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 02:07:34,811 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:07:34,812 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:07:34,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:07:34,812 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)] === [2021-11-23 02:07:34,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:07:34,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1895491222, now seen corresponding path program 1 times [2021-11-23 02:07:34,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:07:34,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991187154] [2021-11-23 02:07:34,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:34,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:07:34,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:34,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:07:34,875 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:07:34,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991187154] [2021-11-23 02:07:34,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991187154] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:07:34,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:07:34,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:07:34,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677739438] [2021-11-23 02:07:34,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:07:34,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:07:34,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:07:34,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:07:34,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:07:34,877 INFO L87 Difference]: Start difference. First operand 178 states and 269 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:07:34,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:07:34,967 INFO L93 Difference]: Finished difference Result 226 states and 292 transitions. [2021-11-23 02:07:34,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:07:34,967 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 [2021-11-23 02:07:34,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:07:34,970 INFO L225 Difference]: With dead ends: 226 [2021-11-23 02:07:34,970 INFO L226 Difference]: Without dead ends: 226 [2021-11-23 02:07:34,970 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 [2021-11-23 02:07:34,971 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 180 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:07:34,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 169 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:07:34,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-11-23 02:07:34,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 192. [2021-11-23 02:07:34,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 155 states have (on average 1.6387096774193548) internal successors, (254), 174 states have internal predecessors, (254), 10 states have call successors, (10), 7 states have call predecessors, (10), 9 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2021-11-23 02:07:34,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 290 transitions. [2021-11-23 02:07:34,982 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 290 transitions. Word has length 9 [2021-11-23 02:07:34,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:07:34,983 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 290 transitions. [2021-11-23 02:07:34,983 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) [2021-11-23 02:07:34,983 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 290 transitions. [2021-11-23 02:07:34,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 02:07:34,984 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:07:34,984 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:07:34,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:07:34,985 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)] === [2021-11-23 02:07:34,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:07:34,985 INFO L85 PathProgramCache]: Analyzing trace with hash -354750800, now seen corresponding path program 1 times [2021-11-23 02:07:34,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:07:34,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164015044] [2021-11-23 02:07:34,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:34,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:07:34,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:35,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:07:35,110 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:07:35,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164015044] [2021-11-23 02:07:35,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164015044] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:07:35,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144672079] [2021-11-23 02:07:35,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:35,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:07:35,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:07:35,113 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:07:35,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:07:35,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:35,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:07:35,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:07:35,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:07:35,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:07:35,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:07:35,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144672079] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:07:35,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1061427403] [2021-11-23 02:07:35,618 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-23 02:07:35,618 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:07:35,623 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:07:35,629 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:07:35,629 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:07:35,719 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 157 for LOIs [2021-11-23 02:07:38,872 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:07:41,942 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2251#(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 [2021-11-23 02:07:41,943 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:07:41,943 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:07:41,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 11 [2021-11-23 02:07:41,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835548927] [2021-11-23 02:07:41,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:07:41,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 02:07:41,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:07:41,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 02:07:41,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-11-23 02:07:41,946 INFO L87 Difference]: Start difference. First operand 192 states and 290 transitions. Second operand has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:07:42,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:07:42,274 INFO L93 Difference]: Finished difference Result 260 states and 349 transitions. [2021-11-23 02:07:42,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:07:42,275 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 [2021-11-23 02:07:42,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:07:42,280 INFO L225 Difference]: With dead ends: 260 [2021-11-23 02:07:42,281 INFO L226 Difference]: Without dead ends: 260 [2021-11-23 02:07:42,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-11-23 02:07:42,282 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 469 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 345 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:07:42,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 345 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:07:42,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-23 02:07:42,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 197. [2021-11-23 02:07:42,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 159 states have (on average 1.5660377358490567) internal successors, (249), 179 states have internal predecessors, (249), 10 states have call successors, (10), 7 states have call predecessors, (10), 10 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2021-11-23 02:07:42,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 286 transitions. [2021-11-23 02:07:42,296 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 286 transitions. Word has length 13 [2021-11-23 02:07:42,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:07:42,297 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 286 transitions. [2021-11-23 02:07:42,297 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) [2021-11-23 02:07:42,297 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 286 transitions. [2021-11-23 02:07:42,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 02:07:42,298 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:07:42,298 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:07:42,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:07:42,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:07:42,522 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)] === [2021-11-23 02:07:42,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:07:42,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1887627038, now seen corresponding path program 1 times [2021-11-23 02:07:42,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:07:42,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563308423] [2021-11-23 02:07:42,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:42,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:07:42,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:42,664 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:07:42,664 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:07:42,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563308423] [2021-11-23 02:07:42,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563308423] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:07:42,665 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293296555] [2021-11-23 02:07:42,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:42,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:07:42,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:07:42,669 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:07:42,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:07:42,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:42,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 02:07:42,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:07:42,874 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 [2021-11-23 02:07:42,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:07:42,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:07:42,950 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:07:42,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293296555] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:07:42,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1323234451] [2021-11-23 02:07:42,953 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2021-11-23 02:07:42,953 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:07:42,954 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:07:42,954 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:07:42,954 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:07:43,002 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 157 for LOIs [2021-11-23 02:07:44,906 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:07:48,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [1323234451] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:07:48,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:07:48,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 4, 4] total 15 [2021-11-23 02:07:48,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539384502] [2021-11-23 02:07:48,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:07:48,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:07:48,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:07:48,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:07:48,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-11-23 02:07:48,567 INFO L87 Difference]: Start difference. First operand 197 states and 286 transitions. Second operand has 8 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:07:49,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:07:49,494 INFO L93 Difference]: Finished difference Result 191 states and 268 transitions. [2021-11-23 02:07:49,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:07:49,495 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 [2021-11-23 02:07:49,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:07:49,497 INFO L225 Difference]: With dead ends: 191 [2021-11-23 02:07:49,497 INFO L226 Difference]: Without dead ends: 191 [2021-11-23 02:07:49,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-11-23 02:07:49,498 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 25 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:07:49,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 109 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:07:49,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-11-23 02:07:49,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2021-11-23 02:07:49,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 153 states have (on average 1.5098039215686274) internal successors, (231), 173 states have internal predecessors, (231), 10 states have call successors, (10), 7 states have call predecessors, (10), 10 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2021-11-23 02:07:49,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 268 transitions. [2021-11-23 02:07:49,509 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 268 transitions. Word has length 14 [2021-11-23 02:07:49,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:07:49,509 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 268 transitions. [2021-11-23 02:07:49,510 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) [2021-11-23 02:07:49,510 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 268 transitions. [2021-11-23 02:07:49,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 02:07:49,511 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:07:49,511 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:07:49,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:07:49,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:07:49,725 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)] === [2021-11-23 02:07:49,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:07:49,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1798666464, now seen corresponding path program 1 times [2021-11-23 02:07:49,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:07:49,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847110384] [2021-11-23 02:07:49,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:49,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:07:49,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:49,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:07:49,902 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:07:49,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847110384] [2021-11-23 02:07:49,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847110384] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:07:49,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050647093] [2021-11-23 02:07:49,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:49,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:07:49,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:07:49,909 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:07:49,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:07:49,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:49,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 02:07:49,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:07:50,241 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:07:50,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-11-23 02:07:50,248 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:07:50,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 02:07:50,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:07:50,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:07:50,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050647093] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:07:50,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1352901790] [2021-11-23 02:07:50,460 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2021-11-23 02:07:50,460 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:07:50,461 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:07:50,461 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:07:50,461 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:07:50,625 INFO L354 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2021-11-23 02:07:50,626 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 [2021-11-23 02:07:50,648 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-23 02:07:50,649 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 [2021-11-23 02:07:51,019 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2021-11-23 02:07:51,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:51,273 INFO L354 Elim1Store]: treesize reduction 46, result has 62.3 percent of original size [2021-11-23 02:07:51,273 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 [2021-11-23 02:07:51,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:51,566 INFO L354 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2021-11-23 02:07:51,567 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 [2021-11-23 02:07:51,650 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:07:55,324 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '3291#(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 [2021-11-23 02:07:55,325 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:07:55,325 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:07:55,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 11 [2021-11-23 02:07:55,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121209989] [2021-11-23 02:07:55,325 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:07:55,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 02:07:55,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:07:55,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 02:07:55,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2021-11-23 02:07:55,327 INFO L87 Difference]: Start difference. First operand 191 states and 268 transitions. Second operand has 13 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 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) [2021-11-23 02:07:55,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:07:55,957 INFO L93 Difference]: Finished difference Result 365 states and 462 transitions. [2021-11-23 02:07:55,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-23 02:07:55,957 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 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 21 [2021-11-23 02:07:55,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:07:55,960 INFO L225 Difference]: With dead ends: 365 [2021-11-23 02:07:55,960 INFO L226 Difference]: Without dead ends: 365 [2021-11-23 02:07:55,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=293, Invalid=1513, Unknown=0, NotChecked=0, Total=1806 [2021-11-23 02:07:55,962 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 436 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:07:55,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 514 Invalid, 536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 330 Invalid, 0 Unknown, 145 Unchecked, 0.3s Time] [2021-11-23 02:07:55,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-11-23 02:07:55,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 292. [2021-11-23 02:07:55,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 245 states have (on average 1.5551020408163265) internal successors, (381), 271 states have internal predecessors, (381), 11 states have call successors, (11), 9 states have call predecessors, (11), 18 states have return successors, (37), 11 states have call predecessors, (37), 11 states have call successors, (37) [2021-11-23 02:07:55,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 429 transitions. [2021-11-23 02:07:55,978 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 429 transitions. Word has length 21 [2021-11-23 02:07:55,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:07:55,979 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 429 transitions. [2021-11-23 02:07:55,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 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) [2021-11-23 02:07:55,979 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 429 transitions. [2021-11-23 02:07:55,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 02:07:55,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:07:55,981 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:07:56,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:07:56,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:07:56,195 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:07:56,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:07:56,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1941617407, now seen corresponding path program 1 times [2021-11-23 02:07:56,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:07:56,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761125016] [2021-11-23 02:07:56,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:56,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:07:56,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:56,493 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:07:56,493 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:07:56,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761125016] [2021-11-23 02:07:56,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761125016] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:07:56,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171497875] [2021-11-23 02:07:56,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:07:56,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:07:56,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:07:56,495 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:07:56,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:07:56,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:07:56,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 02:07:56,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:07:56,929 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:07:56,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-11-23 02:07:56,938 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:07:56,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 02:07:57,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-23 02:07:57,092 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 [2021-11-23 02:07:57,133 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:07:57,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:07:57,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171497875] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:07:57,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [407802611] [2021-11-23 02:07:57,281 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2021-11-23 02:07:57,281 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:07:57,281 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:07:57,281 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:07:57,282 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:07:57,461 INFO L354 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2021-11-23 02:07:57,461 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 [2021-11-23 02:07:57,507 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-23 02:07:57,508 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 [2021-11-23 02:07:57,902 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2021-11-23 02:07:58,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:58,114 INFO L354 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2021-11-23 02:07:58,115 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 [2021-11-23 02:07:58,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:07:58,141 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-23 02:07:58,142 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 [2021-11-23 02:07:58,194 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:08:01,387 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4098#(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 [2021-11-23 02:08:01,387 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:08:01,387 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:08:01,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2021-11-23 02:08:01,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846018954] [2021-11-23 02:08:01,388 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:08:01,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 02:08:01,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:08:01,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 02:08:01,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1050, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 02:08:01,390 INFO L87 Difference]: Start difference. First operand 292 states and 429 transitions. Second operand has 18 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 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) [2021-11-23 02:08:01,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:08:01,860 INFO L93 Difference]: Finished difference Result 369 states and 552 transitions. [2021-11-23 02:08:01,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 02:08:01,861 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 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 23 [2021-11-23 02:08:01,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:08:01,864 INFO L225 Difference]: With dead ends: 369 [2021-11-23 02:08:01,864 INFO L226 Difference]: Without dead ends: 369 [2021-11-23 02:08:01,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 29 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=375, Invalid=1695, Unknown=0, NotChecked=0, Total=2070 [2021-11-23 02:08:01,866 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 102 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 107 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:08:01,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 312 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 100 Invalid, 0 Unknown, 107 Unchecked, 0.1s Time] [2021-11-23 02:08:01,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-11-23 02:08:01,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 289. [2021-11-23 02:08:01,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 244 states have (on average 1.5491803278688525) internal successors, (378), 268 states have internal predecessors, (378), 11 states have call successors, (11), 9 states have call predecessors, (11), 16 states have return successors, (35), 11 states have call predecessors, (35), 11 states have call successors, (35) [2021-11-23 02:08:01,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 424 transitions. [2021-11-23 02:08:01,880 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 424 transitions. Word has length 23 [2021-11-23 02:08:01,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:08:01,881 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 424 transitions. [2021-11-23 02:08:01,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 15 states have internal predecessors, (40), 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) [2021-11-23 02:08:01,881 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 424 transitions. [2021-11-23 02:08:01,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 02:08:01,882 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:08:01,882 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:08:01,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:08:02,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 02:08:02,101 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)] === [2021-11-23 02:08:02,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:08:02,102 INFO L85 PathProgramCache]: Analyzing trace with hash 60597520, now seen corresponding path program 1 times [2021-11-23 02:08:02,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:08:02,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062101417] [2021-11-23 02:08:02,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:02,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:08:02,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:02,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:08:02,205 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:08:02,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062101417] [2021-11-23 02:08:02,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062101417] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:08:02,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627597825] [2021-11-23 02:08:02,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:02,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:08:02,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:08:02,207 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:08:02,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:08:02,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:02,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 02:08:02,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:08:02,373 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 02:08:02,374 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 [2021-11-23 02:08:02,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:08:02,494 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:08:02,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627597825] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:08:02,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [467284742] [2021-11-23 02:08:02,554 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2021-11-23 02:08:02,555 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:08:02,555 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:08:02,555 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:08:02,555 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:08:02,676 INFO L354 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2021-11-23 02:08:02,676 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 [2021-11-23 02:08:02,692 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-23 02:08:02,693 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 [2021-11-23 02:08:03,014 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2021-11-23 02:08:03,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:03,239 INFO L354 Elim1Store]: treesize reduction 46, result has 62.3 percent of original size [2021-11-23 02:08:03,240 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 [2021-11-23 02:08:03,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:03,483 INFO L354 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2021-11-23 02:08:03,484 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 [2021-11-23 02:08:03,555 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:08:06,564 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4900#(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|)) (<= 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 [2021-11-23 02:08:06,565 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:08:06,565 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:08:06,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-11-23 02:08:06,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694387094] [2021-11-23 02:08:06,565 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:08:06,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 02:08:06,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:08:06,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 02:08:06,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2021-11-23 02:08:06,567 INFO L87 Difference]: Start difference. First operand 289 states and 424 transitions. Second operand has 11 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:08:06,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:08:06,779 INFO L93 Difference]: Finished difference Result 427 states and 586 transitions. [2021-11-23 02:08:06,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 02:08:06,780 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-11-23 02:08:06,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:08:06,783 INFO L225 Difference]: With dead ends: 427 [2021-11-23 02:08:06,783 INFO L226 Difference]: Without dead ends: 427 [2021-11-23 02:08:06,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=170, Invalid=952, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 02:08:06,785 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 164 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 102 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:08:06,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 371 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 155 Invalid, 0 Unknown, 102 Unchecked, 0.1s Time] [2021-11-23 02:08:06,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-11-23 02:08:06,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 364. [2021-11-23 02:08:06,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 317 states have (on average 1.5299684542586751) internal successors, (485), 341 states have internal predecessors, (485), 11 states have call successors, (11), 11 states have call predecessors, (11), 18 states have return successors, (32), 11 states have call predecessors, (32), 11 states have call successors, (32) [2021-11-23 02:08:06,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 528 transitions. [2021-11-23 02:08:06,805 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 528 transitions. Word has length 24 [2021-11-23 02:08:06,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:08:06,808 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 528 transitions. [2021-11-23 02:08:06,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:08:06,808 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 528 transitions. [2021-11-23 02:08:06,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 02:08:06,814 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:08:06,815 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:08:06,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:08:07,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:08:07,041 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:08:07,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:08:07,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1878523169, now seen corresponding path program 1 times [2021-11-23 02:08:07,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:08:07,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440338747] [2021-11-23 02:08:07,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:07,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:08:07,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:07,183 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:08:07,183 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:08:07,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440338747] [2021-11-23 02:08:07,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440338747] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:08:07,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570767190] [2021-11-23 02:08:07,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:07,184 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:08:07,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:08:07,190 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:08:07,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:08:07,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:07,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 02:08:07,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:08:07,401 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:08:07,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-11-23 02:08:07,405 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:08:07,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 02:08:07,534 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:08:07,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:08:07,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570767190] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:08:07,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1782384218] [2021-11-23 02:08:07,661 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2021-11-23 02:08:07,661 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:08:07,661 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:08:07,661 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:08:07,662 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:08:07,805 INFO L354 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2021-11-23 02:08:07,806 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 [2021-11-23 02:08:07,823 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-23 02:08:07,824 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 [2021-11-23 02:08:08,180 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2021-11-23 02:08:08,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:08,390 INFO L354 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2021-11-23 02:08:08,390 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 [2021-11-23 02:08:08,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:08,420 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-23 02:08:08,421 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 [2021-11-23 02:08:08,465 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:08:11,328 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5834#(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 [2021-11-23 02:08:11,329 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:08:11,329 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:08:11,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-11-23 02:08:11,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877969458] [2021-11-23 02:08:11,329 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:08:11,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 02:08:11,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:08:11,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 02:08:11,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=963, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 02:08:11,331 INFO L87 Difference]: Start difference. First operand 364 states and 528 transitions. Second operand has 14 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:08:11,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:08:11,841 INFO L93 Difference]: Finished difference Result 517 states and 664 transitions. [2021-11-23 02:08:11,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 02:08:11,843 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2021-11-23 02:08:11,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:08:11,847 INFO L225 Difference]: With dead ends: 517 [2021-11-23 02:08:11,847 INFO L226 Difference]: Without dead ends: 517 [2021-11-23 02:08:11,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=329, Invalid=1927, Unknown=0, NotChecked=0, Total=2256 [2021-11-23 02:08:11,849 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 501 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 501 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 295 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:08:11,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [501 Valid, 587 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 253 Invalid, 0 Unknown, 295 Unchecked, 0.2s Time] [2021-11-23 02:08:11,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-11-23 02:08:11,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 407. [2021-11-23 02:08:11,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 357 states have (on average 1.546218487394958) internal successors, (552), 384 states have internal predecessors, (552), 11 states have call successors, (11), 11 states have call predecessors, (11), 21 states have return successors, (29), 11 states have call predecessors, (29), 11 states have call successors, (29) [2021-11-23 02:08:11,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 592 transitions. [2021-11-23 02:08:11,865 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 592 transitions. Word has length 25 [2021-11-23 02:08:11,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:08:11,865 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 592 transitions. [2021-11-23 02:08:11,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:08:11,866 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 592 transitions. [2021-11-23 02:08:11,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 02:08:11,867 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:08:11,867 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] [2021-11-23 02:08:11,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:08:12,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-23 02:08:12,078 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:08:12,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:08:12,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1950248471, now seen corresponding path program 1 times [2021-11-23 02:08:12,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:08:12,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302427353] [2021-11-23 02:08:12,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:12,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:08:12,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:12,177 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:08:12,178 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:08:12,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302427353] [2021-11-23 02:08:12,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302427353] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:08:12,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476363610] [2021-11-23 02:08:12,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:12,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:08:12,178 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:08:12,179 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:08:12,180 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 02:08:12,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:12,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:08:12,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:08:12,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:08:12,405 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:08:12,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476363610] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:08:12,406 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:08:12,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2021-11-23 02:08:12,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303901212] [2021-11-23 02:08:12,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:08:12,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:08:12,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:08:12,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:08:12,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:08:12,408 INFO L87 Difference]: Start difference. First operand 407 states and 592 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) [2021-11-23 02:08:12,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:08:12,481 INFO L93 Difference]: Finished difference Result 393 states and 538 transitions. [2021-11-23 02:08:12,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:08:12,486 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 [2021-11-23 02:08:12,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:08:12,488 INFO L225 Difference]: With dead ends: 393 [2021-11-23 02:08:12,489 INFO L226 Difference]: Without dead ends: 393 [2021-11-23 02:08:12,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:08:12,492 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 80 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:08:12,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 131 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:08:12,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2021-11-23 02:08:12,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 358. [2021-11-23 02:08:12,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 313 states have (on average 1.5143769968051117) internal successors, (474), 337 states have internal predecessors, (474), 10 states have call successors, (10), 10 states have call predecessors, (10), 17 states have return successors, (23), 10 states have call predecessors, (23), 10 states have call successors, (23) [2021-11-23 02:08:12,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 507 transitions. [2021-11-23 02:08:12,507 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 507 transitions. Word has length 26 [2021-11-23 02:08:12,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:08:12,507 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 507 transitions. [2021-11-23 02:08:12,508 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) [2021-11-23 02:08:12,508 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 507 transitions. [2021-11-23 02:08:12,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 02:08:12,509 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:08:12,509 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:08:12,549 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:08:12,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:08:12,725 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr7REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:08:12,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:08:12,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1374502757, now seen corresponding path program 1 times [2021-11-23 02:08:12,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:08:12,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540826830] [2021-11-23 02:08:12,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:12,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:08:12,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:12,841 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:08:12,841 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:08:12,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540826830] [2021-11-23 02:08:12,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540826830] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:08:12,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309808548] [2021-11-23 02:08:12,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:12,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:08:12,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:08:12,843 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:08:12,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 02:08:12,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:12,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 02:08:12,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:08:13,119 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:08:13,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-11-23 02:08:13,126 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:08:13,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 02:08:13,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:08:13,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:08:13,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309808548] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:08:13,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [527787349] [2021-11-23 02:08:13,488 INFO L159 IcfgInterpreter]: Started Sifa with 19 locations of interest [2021-11-23 02:08:13,488 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:08:13,488 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:08:13,489 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:08:13,489 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:08:13,617 INFO L354 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2021-11-23 02:08:13,618 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 [2021-11-23 02:08:13,639 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-23 02:08:13,639 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 [2021-11-23 02:08:13,990 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2021-11-23 02:08:14,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:14,160 INFO L354 Elim1Store]: treesize reduction 46, result has 62.3 percent of original size [2021-11-23 02:08:14,161 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 [2021-11-23 02:08:14,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:14,379 INFO L354 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2021-11-23 02:08:14,379 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 [2021-11-23 02:08:14,437 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:08:17,760 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7775#(and (< (select |#length| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 9)) (= (select |#valid| |parse_input_~input#1.base|) 1) (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (< |parse_input_~input#1.offset| (select |#length| |parse_input_~input#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|) (< (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))))) (<= 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) (<= 0 (select (select |#memory_$Pointer$.offset| |~#commands~0.base|) (+ |~#commands~0.offset| (* |parse_input_~i~0#1| 9)))) (= |#NULL.offset| 0) (<= 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) (<= |~#commands~0.offset| 0) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))' at error location [2021-11-23 02:08:17,760 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:08:17,761 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:08:17,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-11-23 02:08:17,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122971827] [2021-11-23 02:08:17,761 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:08:17,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 02:08:17,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:08:17,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 02:08:17,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2021-11-23 02:08:17,763 INFO L87 Difference]: Start difference. First operand 358 states and 507 transitions. Second operand has 14 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:08:18,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:08:18,418 INFO L93 Difference]: Finished difference Result 463 states and 598 transitions. [2021-11-23 02:08:18,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 02:08:18,419 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2021-11-23 02:08:18,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:08:18,422 INFO L225 Difference]: With dead ends: 463 [2021-11-23 02:08:18,422 INFO L226 Difference]: Without dead ends: 463 [2021-11-23 02:08:18,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 39 SyntacticMatches, 6 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=285, Invalid=1607, Unknown=0, NotChecked=0, Total=1892 [2021-11-23 02:08:18,424 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 429 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 429 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:08:18,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [429 Valid, 471 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 250 Invalid, 0 Unknown, 109 Unchecked, 0.2s Time] [2021-11-23 02:08:18,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2021-11-23 02:08:18,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 395. [2021-11-23 02:08:18,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 349 states have (on average 1.521489971346705) internal successors, (531), 374 states have internal predecessors, (531), 10 states have call successors, (10), 10 states have call predecessors, (10), 18 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2021-11-23 02:08:18,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 563 transitions. [2021-11-23 02:08:18,443 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 563 transitions. Word has length 27 [2021-11-23 02:08:18,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:08:18,446 INFO L470 AbstractCegarLoop]: Abstraction has 395 states and 563 transitions. [2021-11-23 02:08:18,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 4.363636363636363) internal successors, (48), 11 states have internal predecessors, (48), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:08:18,446 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 563 transitions. [2021-11-23 02:08:18,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 02:08:18,449 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:08:18,449 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:08:18,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 02:08:18,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:08:18,650 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)] === [2021-11-23 02:08:18,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:08:18,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1950933273, now seen corresponding path program 1 times [2021-11-23 02:08:18,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:08:18,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086588445] [2021-11-23 02:08:18,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:18,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:08:18,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:18,816 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:08:18,817 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:08:18,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086588445] [2021-11-23 02:08:18,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086588445] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:08:18,817 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790452673] [2021-11-23 02:08:18,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:18,818 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:08:18,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:08:18,821 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:08:18,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 02:08:18,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:18,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 02:08:18,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:08:19,144 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:08:19,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-11-23 02:08:19,149 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:08:19,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 02:08:19,367 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:08:19,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:08:19,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790452673] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:08:19,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [20175035] [2021-11-23 02:08:19,548 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-23 02:08:19,548 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:08:19,548 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:08:19,549 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:08:19,549 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:08:19,848 INFO L354 Elim1Store]: treesize reduction 176, result has 15.8 percent of original size [2021-11-23 02:08:19,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 204 treesize of output 203 [2021-11-23 02:08:19,932 INFO L354 Elim1Store]: treesize reduction 196, result has 22.5 percent of original size [2021-11-23 02:08:19,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 203 treesize of output 226 [2021-11-23 02:08:20,393 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2021-11-23 02:08:20,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:20,688 INFO L354 Elim1Store]: treesize reduction 58, result has 21.6 percent of original size [2021-11-23 02:08:20,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 61 [2021-11-23 02:08:20,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:20,732 INFO L354 Elim1Store]: treesize reduction 74, result has 24.5 percent of original size [2021-11-23 02:08:20,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 52 treesize of output 66 [2021-11-23 02:08:20,855 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:08:23,215 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8818#(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 [2021-11-23 02:08:23,216 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:08:23,216 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:08:23,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 14 [2021-11-23 02:08:23,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353961161] [2021-11-23 02:08:23,216 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:08:23,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 02:08:23,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:08:23,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 02:08:23,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1118, Unknown=0, NotChecked=0, Total=1260 [2021-11-23 02:08:23,217 INFO L87 Difference]: Start difference. First operand 395 states and 563 transitions. Second operand has 16 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:08:23,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:08:23,947 INFO L93 Difference]: Finished difference Result 465 states and 601 transitions. [2021-11-23 02:08:23,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 02:08:23,948 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2021-11-23 02:08:23,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:08:23,951 INFO L225 Difference]: With dead ends: 465 [2021-11-23 02:08:23,952 INFO L226 Difference]: Without dead ends: 465 [2021-11-23 02:08:23,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 43 SyntacticMatches, 9 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=312, Invalid=2040, Unknown=0, NotChecked=0, Total=2352 [2021-11-23 02:08:23,953 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 568 mSDsluCounter, 474 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:08:23,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [568 Valid, 539 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 301 Invalid, 0 Unknown, 173 Unchecked, 0.2s Time] [2021-11-23 02:08:23,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2021-11-23 02:08:23,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 398. [2021-11-23 02:08:23,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 398 states, 352 states have (on average 1.5198863636363635) internal successors, (535), 377 states have internal predecessors, (535), 10 states have call successors, (10), 10 states have call predecessors, (10), 18 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2021-11-23 02:08:23,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 398 states to 398 states and 567 transitions. [2021-11-23 02:08:23,968 INFO L78 Accepts]: Start accepts. Automaton has 398 states and 567 transitions. Word has length 29 [2021-11-23 02:08:23,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:08:23,969 INFO L470 AbstractCegarLoop]: Abstraction has 398 states and 567 transitions. [2021-11-23 02:08:23,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:08:23,969 INFO L276 IsEmpty]: Start isEmpty. Operand 398 states and 567 transitions. [2021-11-23 02:08:23,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 02:08:23,970 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:08:23,970 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:08:24,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 02:08:24,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-23 02:08:24,197 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting parse_inputErr9REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:08:24,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:08:24,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1952778714, now seen corresponding path program 1 times [2021-11-23 02:08:24,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:08:24,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259147593] [2021-11-23 02:08:24,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:24,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:08:24,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:24,260 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:08:24,260 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:08:24,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259147593] [2021-11-23 02:08:24,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259147593] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:08:24,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:08:24,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:08:24,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485346827] [2021-11-23 02:08:24,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:08:24,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:08:24,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:08:24,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:08:24,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:08:24,264 INFO L87 Difference]: Start difference. First operand 398 states and 567 transitions. Second operand has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 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) [2021-11-23 02:08:24,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:08:24,328 INFO L93 Difference]: Finished difference Result 418 states and 582 transitions. [2021-11-23 02:08:24,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:08:24,329 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 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 29 [2021-11-23 02:08:24,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:08:24,332 INFO L225 Difference]: With dead ends: 418 [2021-11-23 02:08:24,332 INFO L226 Difference]: Without dead ends: 418 [2021-11-23 02:08:24,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:08:24,334 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 88 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:08:24,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 63 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:08:24,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-11-23 02:08:24,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 397. [2021-11-23 02:08:24,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 352 states have (on average 1.5028409090909092) internal successors, (529), 376 states have internal predecessors, (529), 10 states have call successors, (10), 10 states have call predecessors, (10), 18 states have return successors, (22), 10 states have call predecessors, (22), 10 states have call successors, (22) [2021-11-23 02:08:24,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 561 transitions. [2021-11-23 02:08:24,350 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 561 transitions. Word has length 29 [2021-11-23 02:08:24,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:08:24,350 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 561 transitions. [2021-11-23 02:08:24,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.5) internal successors, (26), 5 states have internal predecessors, (26), 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) [2021-11-23 02:08:24,351 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 561 transitions. [2021-11-23 02:08:24,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 02:08:24,351 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:08:24,352 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:08:24,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 02:08:24,352 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:08:24,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:08:24,353 INFO L85 PathProgramCache]: Analyzing trace with hash -349389369, now seen corresponding path program 1 times [2021-11-23 02:08:24,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:08:24,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917838254] [2021-11-23 02:08:24,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:24,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:08:24,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:24,509 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:08:24,509 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:08:24,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917838254] [2021-11-23 02:08:24,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917838254] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:08:24,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808366592] [2021-11-23 02:08:24,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:24,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:08:24,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:08:24,511 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:08:24,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 02:08:24,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:24,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 02:08:24,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:08:24,724 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 02:08:24,724 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 [2021-11-23 02:08:24,964 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 [2021-11-23 02:08:24,987 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:08:24,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:08:25,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808366592] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:08:25,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [306642024] [2021-11-23 02:08:25,103 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-23 02:08:25,103 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:08:25,103 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:08:25,104 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:08:25,104 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:08:25,415 INFO L354 Elim1Store]: treesize reduction 176, result has 15.8 percent of original size [2021-11-23 02:08:25,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 204 treesize of output 203 [2021-11-23 02:08:25,495 INFO L354 Elim1Store]: treesize reduction 196, result has 22.5 percent of original size [2021-11-23 02:08:25,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 203 treesize of output 226 [2021-11-23 02:08:25,934 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2021-11-23 02:08:26,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:26,213 INFO L354 Elim1Store]: treesize reduction 58, result has 21.6 percent of original size [2021-11-23 02:08:26,213 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 61 [2021-11-23 02:08:26,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:26,250 INFO L354 Elim1Store]: treesize reduction 74, result has 24.5 percent of original size [2021-11-23 02:08:26,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 52 treesize of output 66 [2021-11-23 02:08:26,380 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:08:28,594 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '10704#(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 [2021-11-23 02:08:28,595 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:08:28,595 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:08:28,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-11-23 02:08:28,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020565454] [2021-11-23 02:08:28,595 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:08:28,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 02:08:28,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:08:28,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 02:08:28,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2021-11-23 02:08:28,597 INFO L87 Difference]: Start difference. First operand 397 states and 561 transitions. Second operand has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:08:29,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:08:29,138 INFO L93 Difference]: Finished difference Result 611 states and 795 transitions. [2021-11-23 02:08:29,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-23 02:08:29,139 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 30 [2021-11-23 02:08:29,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:08:29,143 INFO L225 Difference]: With dead ends: 611 [2021-11-23 02:08:29,143 INFO L226 Difference]: Without dead ends: 611 [2021-11-23 02:08:29,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 45 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=306, Invalid=2144, Unknown=0, NotChecked=0, Total=2450 [2021-11-23 02:08:29,145 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 325 mSDsluCounter, 610 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 297 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:08:29,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 689 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 412 Invalid, 0 Unknown, 297 Unchecked, 0.3s Time] [2021-11-23 02:08:29,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2021-11-23 02:08:29,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 462. [2021-11-23 02:08:29,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 415 states have (on average 1.5036144578313253) internal successors, (624), 439 states have internal predecessors, (624), 11 states have call successors, (11), 11 states have call predecessors, (11), 19 states have return successors, (24), 11 states have call predecessors, (24), 11 states have call successors, (24) [2021-11-23 02:08:29,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 659 transitions. [2021-11-23 02:08:29,163 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 659 transitions. Word has length 30 [2021-11-23 02:08:29,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:08:29,163 INFO L470 AbstractCegarLoop]: Abstraction has 462 states and 659 transitions. [2021-11-23 02:08:29,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:08:29,163 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 659 transitions. [2021-11-23 02:08:29,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-23 02:08:29,164 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:08:29,164 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:08:29,199 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 02:08:29,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-23 02:08:29,378 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:08:29,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:08:29,379 INFO L85 PathProgramCache]: Analyzing trace with hash 2053831494, now seen corresponding path program 1 times [2021-11-23 02:08:29,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:08:29,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762950869] [2021-11-23 02:08:29,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:29,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:08:29,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:29,571 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:08:29,571 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:08:29,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762950869] [2021-11-23 02:08:29,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762950869] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:08:29,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419865713] [2021-11-23 02:08:29,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:29,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:08:29,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:08:29,573 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:08:29,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 02:08:29,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:29,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 02:08:29,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:08:29,891 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:08:29,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-11-23 02:08:29,896 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:08:29,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 02:08:30,156 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 37 treesize of output 25 [2021-11-23 02:08:30,159 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 [2021-11-23 02:08:30,194 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:08:30,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:08:30,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419865713] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:08:30,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2044687174] [2021-11-23 02:08:30,383 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-23 02:08:30,383 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:08:30,383 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:08:30,384 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:08:30,384 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:08:30,662 INFO L354 Elim1Store]: treesize reduction 193, result has 20.9 percent of original size [2021-11-23 02:08:30,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 217 treesize of output 231 [2021-11-23 02:08:30,770 INFO L354 Elim1Store]: treesize reduction 209, result has 28.7 percent of original size [2021-11-23 02:08:30,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 232 treesize of output 277 [2021-11-23 02:08:31,194 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2021-11-23 02:08:31,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:31,458 INFO L354 Elim1Store]: treesize reduction 58, result has 21.6 percent of original size [2021-11-23 02:08:31,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 61 [2021-11-23 02:08:31,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:31,495 INFO L354 Elim1Store]: treesize reduction 74, result has 24.5 percent of original size [2021-11-23 02:08:31,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 52 treesize of output 66 [2021-11-23 02:08:31,595 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:08:33,868 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '11980#(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 [2021-11-23 02:08:33,868 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:08:33,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:08:33,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 15 [2021-11-23 02:08:33,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19909374] [2021-11-23 02:08:33,868 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:08:33,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 02:08:33,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:08:33,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 02:08:33,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=1252, Unknown=0, NotChecked=0, Total=1406 [2021-11-23 02:08:33,870 INFO L87 Difference]: Start difference. First operand 462 states and 659 transitions. Second operand has 17 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:08:34,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:08:34,551 INFO L93 Difference]: Finished difference Result 537 states and 704 transitions. [2021-11-23 02:08:34,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-23 02:08:34,552 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 31 [2021-11-23 02:08:34,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:08:34,555 INFO L225 Difference]: With dead ends: 537 [2021-11-23 02:08:34,555 INFO L226 Difference]: Without dead ends: 537 [2021-11-23 02:08:34,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=305, Invalid=2245, Unknown=0, NotChecked=0, Total=2550 [2021-11-23 02:08:34,562 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 297 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 716 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 250 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:08:34,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 716 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 333 Invalid, 0 Unknown, 250 Unchecked, 0.3s Time] [2021-11-23 02:08:34,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2021-11-23 02:08:34,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 471. [2021-11-23 02:08:34,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 425 states have (on average 1.4988235294117647) internal successors, (637), 448 states have internal predecessors, (637), 11 states have call successors, (11), 11 states have call predecessors, (11), 18 states have return successors, (22), 11 states have call predecessors, (22), 11 states have call successors, (22) [2021-11-23 02:08:34,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 670 transitions. [2021-11-23 02:08:34,582 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 670 transitions. Word has length 31 [2021-11-23 02:08:34,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:08:34,582 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 670 transitions. [2021-11-23 02:08:34,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 4.0) internal successors, (56), 14 states have internal predecessors, (56), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:08:34,582 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 670 transitions. [2021-11-23 02:08:34,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-23 02:08:34,584 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:08:34,584 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:08:34,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 02:08:34,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-23 02:08:34,805 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:08:34,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:08:34,806 INFO L85 PathProgramCache]: Analyzing trace with hash 281964522, now seen corresponding path program 1 times [2021-11-23 02:08:34,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:08:34,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047496503] [2021-11-23 02:08:34,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:34,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:08:34,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:34,959 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:08:34,959 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:08:34,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047496503] [2021-11-23 02:08:34,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047496503] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:08:34,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923212625] [2021-11-23 02:08:34,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:34,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:08:34,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:08:34,961 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:08:34,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 02:08:35,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:35,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-23 02:08:35,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:08:35,251 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:08:35,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-11-23 02:08:35,259 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:08:35,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 02:08:35,451 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:08:35,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:08:35,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923212625] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:08:35,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1934052155] [2021-11-23 02:08:35,614 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-23 02:08:35,614 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:08:35,614 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:08:35,614 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:08:35,615 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:08:35,891 INFO L354 Elim1Store]: treesize reduction 176, result has 15.8 percent of original size [2021-11-23 02:08:35,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 225 treesize of output 224 [2021-11-23 02:08:35,952 INFO L354 Elim1Store]: treesize reduction 196, result has 22.5 percent of original size [2021-11-23 02:08:35,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 224 treesize of output 247 [2021-11-23 02:08:36,333 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 41 for LOIs [2021-11-23 02:08:36,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:36,698 INFO L354 Elim1Store]: treesize reduction 58, result has 21.6 percent of original size [2021-11-23 02:08:36,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 61 [2021-11-23 02:08:36,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:36,746 INFO L354 Elim1Store]: treesize reduction 74, result has 24.5 percent of original size [2021-11-23 02:08:36,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 52 treesize of output 66 [2021-11-23 02:08:36,844 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:08:39,165 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '13190#(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) (< (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) (= |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 [2021-11-23 02:08:39,166 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:08:39,166 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:08:39,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 14 [2021-11-23 02:08:39,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241209351] [2021-11-23 02:08:39,166 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:08:39,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 02:08:39,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:08:39,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 02:08:39,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=1184, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 02:08:39,167 INFO L87 Difference]: Start difference. First operand 471 states and 670 transitions. Second operand has 16 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 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) [2021-11-23 02:08:39,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:08:39,859 INFO L93 Difference]: Finished difference Result 536 states and 712 transitions. [2021-11-23 02:08:39,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 02:08:39,860 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 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 31 [2021-11-23 02:08:39,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:08:39,863 INFO L225 Difference]: With dead ends: 536 [2021-11-23 02:08:39,863 INFO L226 Difference]: Without dead ends: 536 [2021-11-23 02:08:39,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 735 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=318, Invalid=2132, Unknown=0, NotChecked=0, Total=2450 [2021-11-23 02:08:39,865 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 414 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 144 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:08:39,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 513 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 251 Invalid, 0 Unknown, 144 Unchecked, 0.2s Time] [2021-11-23 02:08:39,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-11-23 02:08:39,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 471. [2021-11-23 02:08:39,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 425 states have (on average 1.4964705882352942) internal successors, (636), 448 states have internal predecessors, (636), 11 states have call successors, (11), 11 states have call predecessors, (11), 18 states have return successors, (22), 11 states have call predecessors, (22), 11 states have call successors, (22) [2021-11-23 02:08:39,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 669 transitions. [2021-11-23 02:08:39,882 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 669 transitions. Word has length 31 [2021-11-23 02:08:39,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:08:39,883 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 669 transitions. [2021-11-23 02:08:39,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 13 states have internal predecessors, (56), 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) [2021-11-23 02:08:39,883 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 669 transitions. [2021-11-23 02:08:39,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-23 02:08:39,884 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:08:39,884 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:08:39,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 02:08:40,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:08:40,098 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:08:40,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:08:40,099 INFO L85 PathProgramCache]: Analyzing trace with hash -755733079, now seen corresponding path program 1 times [2021-11-23 02:08:40,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:08:40,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071417346] [2021-11-23 02:08:40,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:40,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:08:40,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:40,149 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:08:40,150 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:08:40,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071417346] [2021-11-23 02:08:40,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071417346] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:08:40,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:08:40,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:08:40,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100642486] [2021-11-23 02:08:40,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:08:40,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:08:40,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:08:40,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:08:40,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:08:40,152 INFO L87 Difference]: Start difference. First operand 471 states and 669 transitions. Second operand has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:08:40,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:08:40,185 INFO L93 Difference]: Finished difference Result 483 states and 677 transitions. [2021-11-23 02:08:40,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:08:40,185 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-11-23 02:08:40,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:08:40,188 INFO L225 Difference]: With dead ends: 483 [2021-11-23 02:08:40,189 INFO L226 Difference]: Without dead ends: 483 [2021-11-23 02:08:40,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:08:40,191 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 26 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:08:40,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 62 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:08:40,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2021-11-23 02:08:40,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 468. [2021-11-23 02:08:40,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 422 states have (on average 1.4928909952606635) internal successors, (630), 445 states have internal predecessors, (630), 11 states have call successors, (11), 11 states have call predecessors, (11), 18 states have return successors, (22), 11 states have call predecessors, (22), 11 states have call successors, (22) [2021-11-23 02:08:40,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 663 transitions. [2021-11-23 02:08:40,209 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 663 transitions. Word has length 32 [2021-11-23 02:08:40,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:08:40,209 INFO L470 AbstractCegarLoop]: Abstraction has 468 states and 663 transitions. [2021-11-23 02:08:40,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 12.0) internal successors, (24), 3 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:08:40,210 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 663 transitions. [2021-11-23 02:08:40,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-23 02:08:40,210 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:08:40,211 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:08:40,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-23 02:08:40,211 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:08:40,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:08:40,212 INFO L85 PathProgramCache]: Analyzing trace with hash 150965540, now seen corresponding path program 1 times [2021-11-23 02:08:40,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:08:40,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214352138] [2021-11-23 02:08:40,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:40,212 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:08:40,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:40,577 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:08:40,577 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:08:40,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214352138] [2021-11-23 02:08:40,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214352138] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:08:40,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:08:40,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-23 02:08:40,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831850001] [2021-11-23 02:08:40,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:08:40,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:08:40,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:08:40,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:08:40,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:08:40,580 INFO L87 Difference]: Start difference. First operand 468 states and 663 transitions. Second operand has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 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) [2021-11-23 02:08:40,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:08:40,699 INFO L93 Difference]: Finished difference Result 547 states and 741 transitions. [2021-11-23 02:08:40,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:08:40,699 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 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 32 [2021-11-23 02:08:40,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:08:40,703 INFO L225 Difference]: With dead ends: 547 [2021-11-23 02:08:40,703 INFO L226 Difference]: Without dead ends: 547 [2021-11-23 02:08:40,704 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 [2021-11-23 02:08:40,704 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 133 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:08:40,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 240 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:08:40,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2021-11-23 02:08:40,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 497. [2021-11-23 02:08:40,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 446 states have (on average 1.4865470852017937) internal successors, (663), 472 states have internal predecessors, (663), 12 states have call successors, (12), 12 states have call predecessors, (12), 22 states have return successors, (32), 12 states have call predecessors, (32), 12 states have call successors, (32) [2021-11-23 02:08:40,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 707 transitions. [2021-11-23 02:08:40,720 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 707 transitions. Word has length 32 [2021-11-23 02:08:40,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:08:40,721 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 707 transitions. [2021-11-23 02:08:40,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 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) [2021-11-23 02:08:40,721 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 707 transitions. [2021-11-23 02:08:40,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-23 02:08:40,722 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:08:40,722 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:08:40,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-23 02:08:40,723 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:08:40,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:08:40,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1952888920, now seen corresponding path program 1 times [2021-11-23 02:08:40,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:08:40,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533553539] [2021-11-23 02:08:40,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:40,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:08:40,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:40,761 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:08:40,761 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:08:40,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533553539] [2021-11-23 02:08:40,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533553539] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:08:40,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:08:40,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:08:40,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345005247] [2021-11-23 02:08:40,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:08:40,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:08:40,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:08:40,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:08:40,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:08:40,764 INFO L87 Difference]: Start difference. First operand 497 states and 707 transitions. Second operand has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:08:40,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:08:40,815 INFO L93 Difference]: Finished difference Result 500 states and 698 transitions. [2021-11-23 02:08:40,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:08:40,817 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-11-23 02:08:40,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:08:40,820 INFO L225 Difference]: With dead ends: 500 [2021-11-23 02:08:40,820 INFO L226 Difference]: Without dead ends: 500 [2021-11-23 02:08:40,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:08:40,821 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 89 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:08:40,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 63 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:08:40,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-11-23 02:08:40,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 497. [2021-11-23 02:08:40,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 446 states have (on average 1.4663677130044843) internal successors, (654), 472 states have internal predecessors, (654), 12 states have call successors, (12), 12 states have call predecessors, (12), 22 states have return successors, (32), 12 states have call predecessors, (32), 12 states have call successors, (32) [2021-11-23 02:08:40,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 698 transitions. [2021-11-23 02:08:40,836 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 698 transitions. Word has length 33 [2021-11-23 02:08:40,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:08:40,837 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 698 transitions. [2021-11-23 02:08:40,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:08:40,837 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 698 transitions. [2021-11-23 02:08:40,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-23 02:08:40,838 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:08:40,838 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:08:40,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-23 02:08:40,838 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)] === [2021-11-23 02:08:40,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:08:40,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1380998771, now seen corresponding path program 1 times [2021-11-23 02:08:40,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:08:40,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084154306] [2021-11-23 02:08:40,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:40,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:08:40,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:40,866 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:08:40,867 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:08:40,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084154306] [2021-11-23 02:08:40,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084154306] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:08:40,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440958728] [2021-11-23 02:08:40,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:40,868 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:08:40,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:08:40,877 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:08:40,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 02:08:40,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:40,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:08:40,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:08:40,998 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:08:40,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:08:41,050 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:08:41,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440958728] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:08:41,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [613170504] [2021-11-23 02:08:41,052 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-23 02:08:41,053 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:08:41,053 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:08:41,053 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:08:41,054 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:08:41,368 INFO L354 Elim1Store]: treesize reduction 193, result has 20.9 percent of original size [2021-11-23 02:08:41,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 217 treesize of output 231 [2021-11-23 02:08:41,454 INFO L354 Elim1Store]: treesize reduction 209, result has 28.7 percent of original size [2021-11-23 02:08:41,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 232 treesize of output 277 [2021-11-23 02:08:41,884 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 35 for LOIs [2021-11-23 02:08:42,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:42,264 INFO L354 Elim1Store]: treesize reduction 58, result has 21.6 percent of original size [2021-11-23 02:08:42,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 61 [2021-11-23 02:08:42,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:42,303 INFO L354 Elim1Store]: treesize reduction 74, result has 24.5 percent of original size [2021-11-23 02:08:42,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 52 treesize of output 66 [2021-11-23 02:08:42,448 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:08:43,914 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '17463#(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 [2021-11-23 02:08:43,914 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:08:43,915 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:08:43,915 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2021-11-23 02:08:43,915 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071340238] [2021-11-23 02:08:43,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:08:43,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:08:43,915 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:08:43,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:08:43,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-11-23 02:08:43,916 INFO L87 Difference]: Start difference. First operand 497 states and 698 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 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) [2021-11-23 02:08:43,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:08:43,954 INFO L93 Difference]: Finished difference Result 551 states and 748 transitions. [2021-11-23 02:08:43,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:08:43,955 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 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 34 [2021-11-23 02:08:43,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:08:43,958 INFO L225 Difference]: With dead ends: 551 [2021-11-23 02:08:43,959 INFO L226 Difference]: Without dead ends: 551 [2021-11-23 02:08:43,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 8 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-11-23 02:08:43,960 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 63 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:08:43,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 142 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:08:43,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-11-23 02:08:43,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 504. [2021-11-23 02:08:43,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 453 states have (on average 1.4569536423841059) internal successors, (660), 479 states have internal predecessors, (660), 12 states have call successors, (12), 12 states have call predecessors, (12), 22 states have return successors, (32), 12 states have call predecessors, (32), 12 states have call successors, (32) [2021-11-23 02:08:43,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 704 transitions. [2021-11-23 02:08:43,977 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 704 transitions. Word has length 34 [2021-11-23 02:08:43,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:08:43,977 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 704 transitions. [2021-11-23 02:08:43,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 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) [2021-11-23 02:08:43,978 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 704 transitions. [2021-11-23 02:08:43,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-23 02:08:43,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:08:43,979 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:08:44,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-23 02:08:44,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-23 02:08:44,196 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:08:44,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:08:44,196 INFO L85 PathProgramCache]: Analyzing trace with hash -515440830, now seen corresponding path program 1 times [2021-11-23 02:08:44,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:08:44,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36324442] [2021-11-23 02:08:44,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:44,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:08:44,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:44,292 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 02:08:44,292 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:08:44,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36324442] [2021-11-23 02:08:44,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36324442] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:08:44,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864707790] [2021-11-23 02:08:44,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:44,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:08:44,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:08:44,294 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:08:44,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 02:08:44,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:44,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 02:08:44,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:08:44,557 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-23 02:08:44,557 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 [2021-11-23 02:08:44,636 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 02:08:44,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:08:44,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-23 02:08:44,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2021-11-23 02:08:44,824 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 02:08:44,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864707790] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:08:44,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1571033107] [2021-11-23 02:08:44,826 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2021-11-23 02:08:44,827 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:08:44,827 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:08:44,827 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:08:44,828 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:08:45,134 INFO L354 Elim1Store]: treesize reduction 148, result has 41.5 percent of original size [2021-11-23 02:08:45,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 187 treesize of output 258 [2021-11-23 02:08:45,874 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2021-11-23 02:08:46,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:46,510 INFO L354 Elim1Store]: treesize reduction 62, result has 36.7 percent of original size [2021-11-23 02:08:46,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 36 treesize of output 62 [2021-11-23 02:08:46,653 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:08:49,066 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18746#(and (<= |parse_input_~input#1.offset| 0) (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (<= 3 |parse_input_~input#1.base|) (<= |#NULL.offset| 0) (not (= (select |#valid| |~#commands~0.base|) 1)) (<= 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) (<= |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 [2021-11-23 02:08:49,066 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:08:49,066 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:08:49,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 13 [2021-11-23 02:08:49,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160178875] [2021-11-23 02:08:49,067 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:08:49,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 02:08:49,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:08:49,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 02:08:49,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 02:08:49,069 INFO L87 Difference]: Start difference. First operand 504 states and 704 transitions. Second operand has 15 states, 10 states have (on average 7.6) internal successors, (76), 13 states have internal predecessors, (76), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:08:49,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:08:49,637 INFO L93 Difference]: Finished difference Result 654 states and 823 transitions. [2021-11-23 02:08:49,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 02:08:49,638 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 10 states have (on average 7.6) internal successors, (76), 13 states have internal predecessors, (76), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 34 [2021-11-23 02:08:49,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:08:49,642 INFO L225 Difference]: With dead ends: 654 [2021-11-23 02:08:49,642 INFO L226 Difference]: Without dead ends: 654 [2021-11-23 02:08:49,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 69 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=353, Invalid=1809, Unknown=0, NotChecked=0, Total=2162 [2021-11-23 02:08:49,644 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 739 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:08:49,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [739 Valid, 282 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:08:49,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 654 states. [2021-11-23 02:08:49,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 654 to 541. [2021-11-23 02:08:49,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 488 states have (on average 1.4323770491803278) internal successors, (699), 516 states have internal predecessors, (699), 12 states have call successors, (12), 12 states have call predecessors, (12), 24 states have return successors, (27), 12 states have call predecessors, (27), 12 states have call successors, (27) [2021-11-23 02:08:49,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 738 transitions. [2021-11-23 02:08:49,663 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 738 transitions. Word has length 34 [2021-11-23 02:08:49,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:08:49,663 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 738 transitions. [2021-11-23 02:08:49,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 10 states have (on average 7.6) internal successors, (76), 13 states have internal predecessors, (76), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:08:49,664 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 738 transitions. [2021-11-23 02:08:49,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-23 02:08:49,677 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:08:49,677 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:08:49,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-23 02:08:49,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-23 02:08:49,893 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:08:49,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:08:49,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1201203435, now seen corresponding path program 1 times [2021-11-23 02:08:49,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:08:49,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55230629] [2021-11-23 02:08:49,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:49,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:08:49,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:50,198 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:08:50,198 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:08:50,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55230629] [2021-11-23 02:08:50,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55230629] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:08:50,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887118626] [2021-11-23 02:08:50,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:50,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:08:50,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:08:50,210 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:08:50,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 02:08:50,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:50,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 02:08:50,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:08:50,584 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 [2021-11-23 02:08:50,656 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 [2021-11-23 02:08:50,678 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 02:08:50,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:08:50,925 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 02:08:50,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887118626] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:08:50,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1156800431] [2021-11-23 02:08:50,928 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2021-11-23 02:08:50,928 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:08:50,929 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:08:50,929 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:08:50,929 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:08:51,219 INFO L354 Elim1Store]: treesize reduction 173, result has 41.0 percent of original size [2021-11-23 02:08:51,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 200 treesize of output 281 [2021-11-23 02:08:51,578 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2021-11-23 02:08:52,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:52,293 INFO L354 Elim1Store]: treesize reduction 62, result has 36.7 percent of original size [2021-11-23 02:08:52,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 36 treesize of output 62 [2021-11-23 02:08:52,444 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:08:55,023 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20213#(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 [2021-11-23 02:08:55,023 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:08:55,023 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:08:55,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 21 [2021-11-23 02:08:55,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445318897] [2021-11-23 02:08:55,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:08:55,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-23 02:08:55,024 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:08:55,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-23 02:08:55,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1395, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 02:08:55,025 INFO L87 Difference]: Start difference. First operand 541 states and 738 transitions. Second operand has 22 states, 19 states have (on average 4.421052631578948) internal successors, (84), 18 states have internal predecessors, (84), 6 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:08:56,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:08:56,468 INFO L93 Difference]: Finished difference Result 391 states and 471 transitions. [2021-11-23 02:08:56,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-23 02:08:56,469 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 4.421052631578948) internal successors, (84), 18 states have internal predecessors, (84), 6 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 35 [2021-11-23 02:08:56,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:08:56,470 INFO L225 Difference]: With dead ends: 391 [2021-11-23 02:08:56,471 INFO L226 Difference]: Without dead ends: 391 [2021-11-23 02:08:56,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 69 SyntacticMatches, 5 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=602, Invalid=3954, Unknown=0, NotChecked=0, Total=4556 [2021-11-23 02:08:56,472 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 644 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 375 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:08:56,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [644 Valid, 375 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:08:56,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-11-23 02:08:56,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 295. [2021-11-23 02:08:56,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 260 states have (on average 1.396153846153846) internal successors, (363), 280 states have internal predecessors, (363), 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) [2021-11-23 02:08:56,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 382 transitions. [2021-11-23 02:08:56,483 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 382 transitions. Word has length 35 [2021-11-23 02:08:56,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:08:56,483 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 382 transitions. [2021-11-23 02:08:56,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 4.421052631578948) internal successors, (84), 18 states have internal predecessors, (84), 6 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:08:56,484 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 382 transitions. [2021-11-23 02:08:56,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-23 02:08:56,484 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:08:56,485 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:08:56,525 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-23 02:08:56,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:08:56,705 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting parse_inputErr7REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:08:56,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:08:56,706 INFO L85 PathProgramCache]: Analyzing trace with hash 174457900, now seen corresponding path program 1 times [2021-11-23 02:08:56,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:08:56,706 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840655107] [2021-11-23 02:08:56,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:56,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:08:56,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:56,823 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:08:56,824 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:08:56,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840655107] [2021-11-23 02:08:56,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840655107] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:08:56,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49913032] [2021-11-23 02:08:56,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:08:56,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:08:56,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:08:56,826 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:08:56,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 02:08:56,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:08:56,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 02:08:56,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:08:57,102 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:08:57,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-11-23 02:08:57,107 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:08:57,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 02:08:57,438 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:08:57,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:08:57,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49913032] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:08:57,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [324133939] [2021-11-23 02:08:57,677 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-23 02:08:57,677 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:08:57,678 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:08:57,678 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:08:57,678 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:08:57,919 INFO L354 Elim1Store]: treesize reduction 193, result has 20.9 percent of original size [2021-11-23 02:08:57,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 217 treesize of output 231 [2021-11-23 02:08:57,983 INFO L354 Elim1Store]: treesize reduction 209, result has 28.7 percent of original size [2021-11-23 02:08:57,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 232 treesize of output 277 [2021-11-23 02:08:58,548 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2021-11-23 02:08:59,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:59,132 INFO L354 Elim1Store]: treesize reduction 58, result has 21.6 percent of original size [2021-11-23 02:08:59,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 61 [2021-11-23 02:08:59,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:08:59,171 INFO L354 Elim1Store]: treesize reduction 74, result has 24.5 percent of original size [2021-11-23 02:08:59,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 52 treesize of output 66 [2021-11-23 02:08:59,266 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:09:01,438 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '21153#(and (<= |parse_input_~input#1.offset| 0) (< (select |#length| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 9)) (= (select |#valid| |parse_input_~input#1.base|) 1) (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (<= 3 |parse_input_~input#1.base|) (< |parse_input_~input#1.offset| (select |#length| |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) (<= 0 |#StackHeapBarrier|) (<= 0 |parse_input_~i~0#1|) (= |#NULL.base| 0))' at error location [2021-11-23 02:09:01,438 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:09:01,439 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:09:01,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-11-23 02:09:01,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267557628] [2021-11-23 02:09:01,439 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:09:01,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 02:09:01,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:09:01,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 02:09:01,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1171, Unknown=0, NotChecked=0, Total=1332 [2021-11-23 02:09:01,441 INFO L87 Difference]: Start difference. First operand 295 states and 382 transitions. Second operand has 16 states, 13 states have (on average 4.923076923076923) internal successors, (64), 14 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:09:02,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:09:02,108 INFO L93 Difference]: Finished difference Result 409 states and 487 transitions. [2021-11-23 02:09:02,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-23 02:09:02,109 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 13 states have (on average 4.923076923076923) internal successors, (64), 14 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2021-11-23 02:09:02,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:09:02,111 INFO L225 Difference]: With dead ends: 409 [2021-11-23 02:09:02,111 INFO L226 Difference]: Without dead ends: 409 [2021-11-23 02:09:02,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 58 SyntacticMatches, 10 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=424, Invalid=2656, Unknown=0, NotChecked=0, Total=3080 [2021-11-23 02:09:02,112 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 322 mSDsluCounter, 649 mSDsCounter, 0 mSdLazyCounter, 319 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 253 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:09:02,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 720 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 319 Invalid, 0 Unknown, 253 Unchecked, 0.2s Time] [2021-11-23 02:09:02,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2021-11-23 02:09:02,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 347. [2021-11-23 02:09:02,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 309 states have (on average 1.4207119741100325) internal successors, (439), 330 states have internal predecessors, (439), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2021-11-23 02:09:02,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 461 transitions. [2021-11-23 02:09:02,124 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 461 transitions. Word has length 35 [2021-11-23 02:09:02,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:09:02,124 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 461 transitions. [2021-11-23 02:09:02,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 13 states have (on average 4.923076923076923) internal successors, (64), 14 states have internal predecessors, (64), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:09:02,125 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 461 transitions. [2021-11-23 02:09:02,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 02:09:02,125 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:09:02,126 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:09:02,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-23 02:09:02,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-23 02:09:02,350 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:09:02,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:09:02,350 INFO L85 PathProgramCache]: Analyzing trace with hash 531798487, now seen corresponding path program 1 times [2021-11-23 02:09:02,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:09:02,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352370808] [2021-11-23 02:09:02,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:09:02,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:09:02,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:09:02,453 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:09:02,453 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:09:02,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352370808] [2021-11-23 02:09:02,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352370808] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:09:02,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:09:02,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 02:09:02,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439062229] [2021-11-23 02:09:02,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:09:02,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 02:09:02,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:09:02,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 02:09:02,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:09:02,456 INFO L87 Difference]: Start difference. First operand 347 states and 461 transitions. Second operand has 10 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:09:02,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:09:02,569 INFO L93 Difference]: Finished difference Result 382 states and 489 transitions. [2021-11-23 02:09:02,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:09:02,569 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 37 [2021-11-23 02:09:02,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:09:02,571 INFO L225 Difference]: With dead ends: 382 [2021-11-23 02:09:02,571 INFO L226 Difference]: Without dead ends: 382 [2021-11-23 02:09:02,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:09:02,572 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 222 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:09:02,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 97 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:09:02,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-11-23 02:09:02,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 347. [2021-11-23 02:09:02,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 309 states have (on average 1.3980582524271845) internal successors, (432), 330 states have internal predecessors, (432), 8 states have call successors, (8), 8 states have call predecessors, (8), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2021-11-23 02:09:02,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 454 transitions. [2021-11-23 02:09:02,584 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 454 transitions. Word has length 37 [2021-11-23 02:09:02,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:09:02,584 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 454 transitions. [2021-11-23 02:09:02,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 4.0) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 02:09:02,585 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 454 transitions. [2021-11-23 02:09:02,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 02:09:02,585 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:09:02,586 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:09:02,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-23 02:09:02,586 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)] === [2021-11-23 02:09:02,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:09:02,586 INFO L85 PathProgramCache]: Analyzing trace with hash 97514305, now seen corresponding path program 1 times [2021-11-23 02:09:02,587 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:09:02,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242236764] [2021-11-23 02:09:02,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:09:02,587 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:09:02,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:09:02,698 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:09:02,698 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:09:02,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242236764] [2021-11-23 02:09:02,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242236764] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:09:02,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751052553] [2021-11-23 02:09:02,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:09:02,701 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:09:02,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:09:02,705 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:09:02,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 02:09:02,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:09:02,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 02:09:02,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:09:02,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-11-23 02:09:03,000 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:09:03,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:09:03,194 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:09:03,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751052553] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:09:03,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1232525707] [2021-11-23 02:09:03,196 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2021-11-23 02:09:03,197 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:09:03,197 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:09:03,197 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:09:03,197 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:09:03,511 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2021-11-23 02:09:04,191 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:09:06,212 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22947#(and (<= |parse_input_~input#1.offset| 0) (= 6 |~#commands~0.base|) (<= 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) (<= |parse_input_#in~input#1.base| 4) (<= |parse_input_~input#1.base| 4) (<= 3 |parse_input_#in~input#1.base|) (<= 0 |#NULL.offset|) (not (= (select |#valid| |parse_input_#t~mem3#1.base|) 1)) (<= 0 |#StackHeapBarrier|) (<= 0 |parse_input_~i~0#1|) (<= |~#commands~0.offset| 0) (= |#NULL.base| 0))' at error location [2021-11-23 02:09:06,212 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:09:06,212 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:09:06,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2021-11-23 02:09:06,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393856297] [2021-11-23 02:09:06,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:09:06,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 02:09:06,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:09:06,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 02:09:06,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-11-23 02:09:06,214 INFO L87 Difference]: Start difference. First operand 347 states and 454 transitions. Second operand has 16 states, 16 states have (on average 4.625) internal successors, (74), 15 states have internal predecessors, (74), 3 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:09:06,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:09:06,792 INFO L93 Difference]: Finished difference Result 427 states and 527 transitions. [2021-11-23 02:09:06,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 02:09:06,793 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.625) internal successors, (74), 15 states have internal predecessors, (74), 3 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 37 [2021-11-23 02:09:06,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:09:06,795 INFO L225 Difference]: With dead ends: 427 [2021-11-23 02:09:06,795 INFO L226 Difference]: Without dead ends: 427 [2021-11-23 02:09:06,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 83 SyntacticMatches, 7 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=267, Invalid=1539, Unknown=0, NotChecked=0, Total=1806 [2021-11-23 02:09:06,796 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 369 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:09:06,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 233 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:09:06,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-11-23 02:09:06,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 326. [2021-11-23 02:09:06,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 287 states have (on average 1.3832752613240418) internal successors, (397), 309 states have internal predecessors, (397), 8 states have call successors, (8), 8 states have call predecessors, (8), 14 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-11-23 02:09:06,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 420 transitions. [2021-11-23 02:09:06,808 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 420 transitions. Word has length 37 [2021-11-23 02:09:06,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:09:06,808 INFO L470 AbstractCegarLoop]: Abstraction has 326 states and 420 transitions. [2021-11-23 02:09:06,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.625) internal successors, (74), 15 states have internal predecessors, (74), 3 states have call successors, (6), 6 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-23 02:09:06,809 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 420 transitions. [2021-11-23 02:09:06,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 02:09:06,809 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:09:06,810 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:09:06,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-23 02:09:07,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-23 02:09:07,025 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:09:07,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:09:07,026 INFO L85 PathProgramCache]: Analyzing trace with hash 152161774, now seen corresponding path program 2 times [2021-11-23 02:09:07,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:09:07,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603587136] [2021-11-23 02:09:07,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:09:07,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:09:07,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:09:07,064 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 19 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:09:07,064 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:09:07,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603587136] [2021-11-23 02:09:07,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603587136] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:09:07,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694858350] [2021-11-23 02:09:07,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:09:07,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:09:07,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:09:07,068 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:09:07,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 02:09:07,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 02:09:07,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:09:07,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 02:09:07,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:09:07,326 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:09:07,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-11-23 02:09:07,332 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:09:07,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 02:09:07,647 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 10 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:09:07,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:09:07,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694858350] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:09:07,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1827316487] [2021-11-23 02:09:07,990 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-23 02:09:07,990 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:09:07,990 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:09:07,990 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:09:07,990 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:09:08,264 INFO L354 Elim1Store]: treesize reduction 193, result has 20.9 percent of original size [2021-11-23 02:09:08,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 217 treesize of output 231 [2021-11-23 02:09:08,345 INFO L354 Elim1Store]: treesize reduction 209, result has 28.7 percent of original size [2021-11-23 02:09:08,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 232 treesize of output 277 [2021-11-23 02:09:08,805 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 187 for LOIs [2021-11-23 02:09:09,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:09,296 INFO L354 Elim1Store]: treesize reduction 58, result has 21.6 percent of original size [2021-11-23 02:09:09,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 61 [2021-11-23 02:09:09,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:09,335 INFO L354 Elim1Store]: treesize reduction 74, result has 24.5 percent of original size [2021-11-23 02:09:09,335 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 52 treesize of output 66 [2021-11-23 02:09:09,428 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:09:11,639 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '23929#(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 [2021-11-23 02:09:11,639 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:09:11,639 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:09:11,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 12 [2021-11-23 02:09:11,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446436287] [2021-11-23 02:09:11,640 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:09:11,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 02:09:11,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:09:11,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 02:09:11,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=911, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 02:09:11,641 INFO L87 Difference]: Start difference. First operand 326 states and 420 transitions. Second operand has 12 states, 11 states have (on average 6.090909090909091) internal successors, (67), 12 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:09:11,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:09:11,920 INFO L93 Difference]: Finished difference Result 408 states and 513 transitions. [2021-11-23 02:09:11,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 02:09:11,921 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 6.090909090909091) internal successors, (67), 12 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 37 [2021-11-23 02:09:11,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:09:11,923 INFO L225 Difference]: With dead ends: 408 [2021-11-23 02:09:11,923 INFO L226 Difference]: Without dead ends: 408 [2021-11-23 02:09:11,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 68 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=225, Invalid=1497, Unknown=0, NotChecked=0, Total=1722 [2021-11-23 02:09:11,924 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 83 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:09:11,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 361 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 142 Invalid, 0 Unknown, 124 Unchecked, 0.1s Time] [2021-11-23 02:09:11,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2021-11-23 02:09:11,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 379. [2021-11-23 02:09:11,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 340 states have (on average 1.3647058823529412) internal successors, (464), 362 states have internal predecessors, (464), 8 states have call successors, (8), 8 states have call predecessors, (8), 14 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-11-23 02:09:11,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 487 transitions. [2021-11-23 02:09:11,950 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 487 transitions. Word has length 37 [2021-11-23 02:09:11,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:09:11,950 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 487 transitions. [2021-11-23 02:09:11,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 6.090909090909091) internal successors, (67), 12 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:09:11,952 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 487 transitions. [2021-11-23 02:09:11,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-23 02:09:11,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:09:11,957 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:09:11,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-23 02:09:12,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-23 02:09:12,169 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:09:12,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:09:12,170 INFO L85 PathProgramCache]: Analyzing trace with hash -42763722, now seen corresponding path program 1 times [2021-11-23 02:09:12,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:09:12,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484807275] [2021-11-23 02:09:12,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:09:12,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:09:12,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:09:12,412 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 22 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:09:12,412 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:09:12,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484807275] [2021-11-23 02:09:12,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484807275] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:09:12,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198290630] [2021-11-23 02:09:12,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:09:12,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:09:12,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:09:12,414 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:09:12,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-23 02:09:12,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:09:12,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 02:09:12,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:09:12,732 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-23 02:09:12,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 30 [2021-11-23 02:09:12,741 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-23 02:09:12,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 26 [2021-11-23 02:09:12,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2021-11-23 02:09:12,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-23 02:09:12,912 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:09:12,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:09:13,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 40 [2021-11-23 02:09:13,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 50 [2021-11-23 02:09:13,028 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 02:09:13,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 49 [2021-11-23 02:09:13,219 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-11-23 02:09:13,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 50 [2021-11-23 02:09:13,280 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 02:09:13,281 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 [2021-11-23 02:09:13,309 INFO L354 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2021-11-23 02:09:13,309 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 [2021-11-23 02:09:13,356 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:09:13,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198290630] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:09:13,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1270564499] [2021-11-23 02:09:13,358 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-23 02:09:13,358 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:09:13,359 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:09:13,359 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:09:13,359 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:09:13,452 INFO L354 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2021-11-23 02:09:13,452 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 [2021-11-23 02:09:13,472 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-23 02:09:13,473 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 [2021-11-23 02:09:13,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:13,781 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-23 02:09:13,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 730 treesize of output 706 [2021-11-23 02:09:13,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:13,799 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-23 02:09:13,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 706 treesize of output 682 [2021-11-23 02:09:14,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:14,068 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-23 02:09:14,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 730 treesize of output 706 [2021-11-23 02:09:14,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:14,084 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-23 02:09:14,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 706 treesize of output 682 [2021-11-23 02:09:14,381 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 42 for LOIs [2021-11-23 02:09:14,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:14,587 INFO L354 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2021-11-23 02:09:14,588 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 [2021-11-23 02:09:14,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:14,607 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-23 02:09:14,608 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 [2021-11-23 02:09:14,677 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:09:17,668 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25012#(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) (= |#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|) (<= |parse_input_#in~input#1.base| 5) (<= |~#commands~0.offset| 0) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))' at error location [2021-11-23 02:09:17,669 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:09:17,669 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:09:17,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 10] total 27 [2021-11-23 02:09:17,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416730983] [2021-11-23 02:09:17,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:09:17,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-23 02:09:17,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:09:17,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-23 02:09:17,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=1583, Unknown=0, NotChecked=0, Total=1980 [2021-11-23 02:09:17,671 INFO L87 Difference]: Start difference. First operand 379 states and 487 transitions. Second operand has 28 states, 25 states have (on average 3.44) internal successors, (86), 26 states have internal predecessors, (86), 6 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-23 02:09:18,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:09:18,272 INFO L93 Difference]: Finished difference Result 424 states and 535 transitions. [2021-11-23 02:09:18,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 02:09:18,274 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 25 states have (on average 3.44) internal successors, (86), 26 states have internal predecessors, (86), 6 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2021-11-23 02:09:18,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:09:18,275 INFO L225 Difference]: With dead ends: 424 [2021-11-23 02:09:18,275 INFO L226 Difference]: Without dead ends: 424 [2021-11-23 02:09:18,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 94 SyntacticMatches, 5 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=650, Invalid=2542, Unknown=0, NotChecked=0, Total=3192 [2021-11-23 02:09:18,277 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 400 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:09:18,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [403 Valid, 246 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 175 Invalid, 0 Unknown, 196 Unchecked, 0.1s Time] [2021-11-23 02:09:18,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-11-23 02:09:18,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 379. [2021-11-23 02:09:18,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 340 states have (on average 1.3529411764705883) internal successors, (460), 362 states have internal predecessors, (460), 8 states have call successors, (8), 8 states have call predecessors, (8), 14 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-11-23 02:09:18,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 483 transitions. [2021-11-23 02:09:18,289 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 483 transitions. Word has length 39 [2021-11-23 02:09:18,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:09:18,290 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 483 transitions. [2021-11-23 02:09:18,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 25 states have (on average 3.44) internal successors, (86), 26 states have internal predecessors, (86), 6 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-23 02:09:18,290 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 483 transitions. [2021-11-23 02:09:18,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-23 02:09:18,291 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:09:18,291 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:09:18,325 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-23 02:09:18,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:09:18,505 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)] === [2021-11-23 02:09:18,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:09:18,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1573291727, now seen corresponding path program 1 times [2021-11-23 02:09:18,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:09:18,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510709910] [2021-11-23 02:09:18,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:09:18,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:09:18,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:09:18,550 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:09:18,550 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:09:18,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510709910] [2021-11-23 02:09:18,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510709910] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:09:18,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775021440] [2021-11-23 02:09:18,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:09:18,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:09:18,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:09:18,563 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:09:18,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-23 02:09:18,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:09:18,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:09:18,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:09:18,694 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:09:18,694 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:09:18,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775021440] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:09:18,695 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:09:18,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2021-11-23 02:09:18,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912255689] [2021-11-23 02:09:18,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:09:18,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:09:18,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:09:18,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:09:18,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:09:18,696 INFO L87 Difference]: Start difference. First operand 379 states and 483 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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) [2021-11-23 02:09:18,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:09:18,724 INFO L93 Difference]: Finished difference Result 358 states and 432 transitions. [2021-11-23 02:09:18,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:09:18,724 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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 39 [2021-11-23 02:09:18,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:09:18,726 INFO L225 Difference]: With dead ends: 358 [2021-11-23 02:09:18,726 INFO L226 Difference]: Without dead ends: 358 [2021-11-23 02:09:18,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:09:18,726 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 74 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:09:18,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 117 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:09:18,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2021-11-23 02:09:18,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 316. [2021-11-23 02:09:18,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 277 states have (on average 1.3285198555956679) internal successors, (368), 299 states have internal predecessors, (368), 8 states have call successors, (8), 8 states have call predecessors, (8), 14 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-11-23 02:09:18,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 391 transitions. [2021-11-23 02:09:18,736 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 391 transitions. Word has length 39 [2021-11-23 02:09:18,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:09:18,737 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 391 transitions. [2021-11-23 02:09:18,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 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) [2021-11-23 02:09:18,737 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 391 transitions. [2021-11-23 02:09:18,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-23 02:09:18,738 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:09:18,738 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:09:18,770 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-11-23 02:09:18,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-23 02:09:18,965 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:09:18,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:09:18,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1325675335, now seen corresponding path program 1 times [2021-11-23 02:09:18,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:09:18,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112911379] [2021-11-23 02:09:18,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:09:18,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:09:18,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:09:19,059 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:09:19,059 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:09:19,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112911379] [2021-11-23 02:09:19,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112911379] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:09:19,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139152572] [2021-11-23 02:09:19,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:09:19,060 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:09:19,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:09:19,061 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:09:19,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-23 02:09:19,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:09:19,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 02:09:19,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:09:19,206 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 02:09:19,207 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 [2021-11-23 02:09:19,289 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-23 02:09:19,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 26 [2021-11-23 02:09:19,416 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:09:19,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:09:19,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139152572] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:09:19,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [188324417] [2021-11-23 02:09:19,571 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-23 02:09:19,571 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:09:19,572 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:09:19,572 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:09:19,572 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:09:19,674 INFO L354 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2021-11-23 02:09:19,674 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 [2021-11-23 02:09:19,692 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-23 02:09:19,693 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 [2021-11-23 02:09:20,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:20,033 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-23 02:09:20,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 730 treesize of output 706 [2021-11-23 02:09:20,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:20,054 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-23 02:09:20,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 706 treesize of output 682 [2021-11-23 02:09:20,390 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:20,396 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-23 02:09:20,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 730 treesize of output 706 [2021-11-23 02:09:20,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:20,417 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-23 02:09:20,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 706 treesize of output 682 [2021-11-23 02:09:20,655 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 42 for LOIs [2021-11-23 02:09:20,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:20,858 INFO L354 Elim1Store]: treesize reduction 46, result has 62.3 percent of original size [2021-11-23 02:09:20,858 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 [2021-11-23 02:09:20,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:21,036 INFO L354 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2021-11-23 02:09:21,036 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 [2021-11-23 02:09:21,096 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:09:24,168 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '26870#(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|)) (<= 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) (= |#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|) (<= |parse_input_#in~input#1.base| 5) (<= |~#commands~0.offset| 0) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))' at error location [2021-11-23 02:09:24,168 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:09:24,168 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:09:24,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-11-23 02:09:24,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063114215] [2021-11-23 02:09:24,169 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:09:24,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 02:09:24,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:09:24,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 02:09:24,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=876, Unknown=0, NotChecked=0, Total=1056 [2021-11-23 02:09:24,170 INFO L87 Difference]: Start difference. First operand 316 states and 391 transitions. Second operand has 14 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 02:09:24,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:09:24,295 INFO L93 Difference]: Finished difference Result 398 states and 473 transitions. [2021-11-23 02:09:24,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 02:09:24,300 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2021-11-23 02:09:24,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:09:24,302 INFO L225 Difference]: With dead ends: 398 [2021-11-23 02:09:24,302 INFO L226 Difference]: Without dead ends: 398 [2021-11-23 02:09:24,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=208, Invalid=1052, Unknown=0, NotChecked=0, Total=1260 [2021-11-23 02:09:24,303 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 144 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:09:24,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 548 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 80 Invalid, 0 Unknown, 165 Unchecked, 0.1s Time] [2021-11-23 02:09:24,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-11-23 02:09:24,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 316. [2021-11-23 02:09:24,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 277 states have (on average 1.3176895306859207) internal successors, (365), 299 states have internal predecessors, (365), 8 states have call successors, (8), 8 states have call predecessors, (8), 14 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-11-23 02:09:24,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 388 transitions. [2021-11-23 02:09:24,311 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 388 transitions. Word has length 40 [2021-11-23 02:09:24,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:09:24,312 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 388 transitions. [2021-11-23 02:09:24,312 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 2 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 02:09:24,312 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 388 transitions. [2021-11-23 02:09:24,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-23 02:09:24,313 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:09:24,313 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:09:24,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-23 02:09:24,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-23 02:09:24,525 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:09:24,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:09:24,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1574744148, now seen corresponding path program 1 times [2021-11-23 02:09:24,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:09:24,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494190447] [2021-11-23 02:09:24,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:09:24,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:09:24,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:09:24,552 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 02:09:24,552 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:09:24,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494190447] [2021-11-23 02:09:24,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494190447] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:09:24,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:09:24,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:09:24,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458722116] [2021-11-23 02:09:24,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:09:24,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:09:24,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:09:24,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:09:24,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:09:24,555 INFO L87 Difference]: Start difference. First operand 316 states and 388 transitions. Second operand has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:09:24,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:09:24,575 INFO L93 Difference]: Finished difference Result 314 states and 380 transitions. [2021-11-23 02:09:24,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:09:24,576 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 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 [2021-11-23 02:09:24,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:09:24,578 INFO L225 Difference]: With dead ends: 314 [2021-11-23 02:09:24,578 INFO L226 Difference]: Without dead ends: 314 [2021-11-23 02:09:24,578 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 [2021-11-23 02:09:24,579 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 33 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:09:24,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 46 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:09:24,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-11-23 02:09:24,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 314. [2021-11-23 02:09:24,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 277 states have (on average 1.288808664259928) internal successors, (357), 297 states have internal predecessors, (357), 8 states have call successors, (8), 8 states have call predecessors, (8), 14 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-11-23 02:09:24,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 380 transitions. [2021-11-23 02:09:24,589 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 380 transitions. Word has length 40 [2021-11-23 02:09:24,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:09:24,590 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 380 transitions. [2021-11-23 02:09:24,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 15.5) internal successors, (31), 3 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:09:24,590 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 380 transitions. [2021-11-23 02:09:24,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-23 02:09:24,591 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:09:24,592 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:09:24,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-23 02:09:24,592 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:09:24,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:09:24,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1574743892, now seen corresponding path program 1 times [2021-11-23 02:09:24,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:09:24,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878446412] [2021-11-23 02:09:24,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:09:24,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:09:24,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:09:24,624 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 02:09:24,624 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:09:24,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878446412] [2021-11-23 02:09:24,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878446412] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:09:24,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:09:24,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:09:24,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107004795] [2021-11-23 02:09:24,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:09:24,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:09:24,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:09:24,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:09:24,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:09:24,628 INFO L87 Difference]: Start difference. First operand 314 states and 380 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:09:24,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:09:24,638 INFO L93 Difference]: Finished difference Result 248 states and 282 transitions. [2021-11-23 02:09:24,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:09:24,638 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-11-23 02:09:24,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:09:24,640 INFO L225 Difference]: With dead ends: 248 [2021-11-23 02:09:24,640 INFO L226 Difference]: Without dead ends: 248 [2021-11-23 02:09:24,640 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 [2021-11-23 02:09:24,641 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 9 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:09:24,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 71 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:09:24,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-11-23 02:09:24,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 245. [2021-11-23 02:09:24,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 217 states have (on average 1.1935483870967742) internal successors, (259), 230 states have internal predecessors, (259), 7 states have call successors, (7), 7 states have call predecessors, (7), 12 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-23 02:09:24,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 279 transitions. [2021-11-23 02:09:24,656 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 279 transitions. Word has length 40 [2021-11-23 02:09:24,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:09:24,656 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 279 transitions. [2021-11-23 02:09:24,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:09:24,657 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 279 transitions. [2021-11-23 02:09:24,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-23 02:09:24,658 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:09:24,658 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:09:24,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-23 02:09:24,658 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:09:24,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:09:24,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1853737624, now seen corresponding path program 1 times [2021-11-23 02:09:24,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:09:24,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790215676] [2021-11-23 02:09:24,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:09:24,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:09:24,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:09:24,778 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:09:24,778 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:09:24,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790215676] [2021-11-23 02:09:24,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790215676] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:09:24,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711388445] [2021-11-23 02:09:24,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:09:24,779 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:09:24,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:09:24,780 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:09:24,781 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-23 02:09:24,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:09:24,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-23 02:09:24,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:09:24,958 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 02:09:24,958 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 28 treesize of output 32 [2021-11-23 02:09:24,965 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:09:24,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-11-23 02:09:25,075 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-23 02:09:25,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 37 [2021-11-23 02:09:25,083 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-23 02:09:25,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 29 [2021-11-23 02:09:25,364 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:09:25,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:09:25,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711388445] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:09:25,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1091502761] [2021-11-23 02:09:25,474 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2021-11-23 02:09:25,474 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:09:25,475 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:09:25,475 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:09:25,475 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:09:25,589 INFO L354 Elim1Store]: treesize reduction 118, result has 27.2 percent of original size [2021-11-23 02:09:25,589 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 [2021-11-23 02:09:25,608 INFO L354 Elim1Store]: treesize reduction 40, result has 2.4 percent of original size [2021-11-23 02:09:25,608 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 [2021-11-23 02:09:25,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:25,933 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-23 02:09:25,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 730 treesize of output 706 [2021-11-23 02:09:25,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:25,951 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-23 02:09:25,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 706 treesize of output 682 [2021-11-23 02:09:26,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:26,213 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-23 02:09:26,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 730 treesize of output 706 [2021-11-23 02:09:26,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:26,229 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-23 02:09:26,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 706 treesize of output 682 [2021-11-23 02:09:26,456 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 42 for LOIs [2021-11-23 02:09:26,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:26,648 INFO L354 Elim1Store]: treesize reduction 110, result has 28.6 percent of original size [2021-11-23 02:09:26,648 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 [2021-11-23 02:09:26,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:26,685 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-23 02:09:26,685 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 [2021-11-23 02:09:26,737 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:09:29,672 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '28908#(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) (= |#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|) (<= |parse_input_#in~input#1.base| 5) (<= |~#commands~0.offset| 0) (= (select |#valid| |~#commands~0.base|) 1) (= |#NULL.base| 0))' at error location [2021-11-23 02:09:29,672 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:09:29,672 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:09:29,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 17 [2021-11-23 02:09:29,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614813478] [2021-11-23 02:09:29,672 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:09:29,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 02:09:29,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:09:29,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 02:09:29,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1358, Unknown=0, NotChecked=0, Total=1560 [2021-11-23 02:09:29,674 INFO L87 Difference]: Start difference. First operand 245 states and 279 transitions. Second operand has 19 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 02:09:30,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:09:30,196 INFO L93 Difference]: Finished difference Result 308 states and 339 transitions. [2021-11-23 02:09:30,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 02:09:30,197 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 41 [2021-11-23 02:09:30,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:09:30,198 INFO L225 Difference]: With dead ends: 308 [2021-11-23 02:09:30,199 INFO L226 Difference]: Without dead ends: 308 [2021-11-23 02:09:30,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=321, Invalid=2129, Unknown=0, NotChecked=0, Total=2450 [2021-11-23 02:09:30,200 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 236 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:09:30,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [236 Valid, 400 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 213 Invalid, 0 Unknown, 143 Unchecked, 0.2s Time] [2021-11-23 02:09:30,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-11-23 02:09:30,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 281. [2021-11-23 02:09:30,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 251 states have (on average 1.1872509960159363) internal successors, (298), 264 states have internal predecessors, (298), 8 states have call successors, (8), 8 states have call predecessors, (8), 14 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-11-23 02:09:30,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 321 transitions. [2021-11-23 02:09:30,207 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 321 transitions. Word has length 41 [2021-11-23 02:09:30,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:09:30,207 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 321 transitions. [2021-11-23 02:09:30,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 12 states have (on average 5.083333333333333) internal successors, (61), 12 states have internal predecessors, (61), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 02:09:30,208 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 321 transitions. [2021-11-23 02:09:30,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-23 02:09:30,208 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:09:30,208 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] [2021-11-23 02:09:30,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-23 02:09:30,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-23 02:09:30,409 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:09:30,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:09:30,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1572428260, now seen corresponding path program 1 times [2021-11-23 02:09:30,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:09:30,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762706792] [2021-11-23 02:09:30,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:09:30,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:09:30,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:09:30,449 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 02:09:30,449 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:09:30,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762706792] [2021-11-23 02:09:30,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762706792] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:09:30,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:09:30,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:09:30,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777655655] [2021-11-23 02:09:30,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:09:30,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:09:30,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:09:30,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:09:30,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:09:30,452 INFO L87 Difference]: Start difference. First operand 281 states and 321 transitions. Second operand has 3 states, 2 states have (on average 16.0) internal successors, (32), 3 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) [2021-11-23 02:09:30,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:09:30,463 INFO L93 Difference]: Finished difference Result 280 states and 317 transitions. [2021-11-23 02:09:30,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:09:30,463 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 16.0) internal successors, (32), 3 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 41 [2021-11-23 02:09:30,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:09:30,465 INFO L225 Difference]: With dead ends: 280 [2021-11-23 02:09:30,465 INFO L226 Difference]: Without dead ends: 280 [2021-11-23 02:09:30,466 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 [2021-11-23 02:09:30,466 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 17 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:09:30,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 31 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:09:30,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-11-23 02:09:30,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2021-11-23 02:09:30,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 251 states have (on average 1.1713147410358566) internal successors, (294), 263 states have internal predecessors, (294), 8 states have call successors, (8), 8 states have call predecessors, (8), 14 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-11-23 02:09:30,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 317 transitions. [2021-11-23 02:09:30,476 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 317 transitions. Word has length 41 [2021-11-23 02:09:30,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:09:30,476 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 317 transitions. [2021-11-23 02:09:30,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 16.0) internal successors, (32), 3 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) [2021-11-23 02:09:30,476 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 317 transitions. [2021-11-23 02:09:30,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-23 02:09:30,477 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:09:30,477 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] [2021-11-23 02:09:30,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-23 02:09:30,478 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting parse_inputErr12ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:09:30,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:09:30,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1500635730, now seen corresponding path program 1 times [2021-11-23 02:09:30,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:09:30,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932635192] [2021-11-23 02:09:30,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:09:30,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:09:30,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:09:30,513 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 02:09:30,513 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:09:30,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932635192] [2021-11-23 02:09:30,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932635192] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:09:30,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:09:30,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:09:30,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769923578] [2021-11-23 02:09:30,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:09:30,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:09:30,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:09:30,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:09:30,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:09:30,518 INFO L87 Difference]: Start difference. First operand 280 states and 317 transitions. Second operand has 3 states, 2 states have (on average 16.5) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:09:30,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:09:30,543 INFO L93 Difference]: Finished difference Result 300 states and 330 transitions. [2021-11-23 02:09:30,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:09:30,544 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 16.5) internal successors, (33), 3 states have internal predecessors, (33), 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 [2021-11-23 02:09:30,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:09:30,545 INFO L225 Difference]: With dead ends: 300 [2021-11-23 02:09:30,546 INFO L226 Difference]: Without dead ends: 300 [2021-11-23 02:09:30,546 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 [2021-11-23 02:09:30,546 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 12 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:09:30,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 68 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:09:30,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-11-23 02:09:30,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 284. [2021-11-23 02:09:30,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 255 states have (on average 1.1568627450980393) internal successors, (295), 267 states have internal predecessors, (295), 8 states have call successors, (8), 8 states have call predecessors, (8), 14 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-11-23 02:09:30,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 318 transitions. [2021-11-23 02:09:30,554 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 318 transitions. Word has length 42 [2021-11-23 02:09:30,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:09:30,554 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 318 transitions. [2021-11-23 02:09:30,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 16.5) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:09:30,555 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 318 transitions. [2021-11-23 02:09:30,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-23 02:09:30,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:09:30,556 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:09:30,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-23 02:09:30,556 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:09:30,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:09:30,557 INFO L85 PathProgramCache]: Analyzing trace with hash 253450462, now seen corresponding path program 1 times [2021-11-23 02:09:30,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:09:30,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24623235] [2021-11-23 02:09:30,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:09:30,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:09:30,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:09:30,787 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:09:30,787 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:09:30,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24623235] [2021-11-23 02:09:30,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24623235] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:09:30,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482016847] [2021-11-23 02:09:30,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:09:30,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:09:30,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:09:30,793 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:09:30,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-23 02:09:30,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:09:30,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-23 02:09:30,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:09:31,064 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:09:31,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-11-23 02:09:31,068 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:09:31,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 02:09:31,219 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:09:31,220 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 [2021-11-23 02:09:31,287 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-23 02:09:31,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 26 [2021-11-23 02:09:31,465 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:09:31,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:09:31,588 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 02:09:31,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-11-23 02:09:31,828 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 02:09:31,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-11-23 02:09:31,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482016847] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:09:31,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [104230944] [2021-11-23 02:09:31,927 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-23 02:09:31,927 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:09:31,927 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:09:31,928 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:09:31,928 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:09:32,173 INFO L354 Elim1Store]: treesize reduction 176, result has 15.8 percent of original size [2021-11-23 02:09:32,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 204 treesize of output 203 [2021-11-23 02:09:32,234 INFO L354 Elim1Store]: treesize reduction 196, result has 22.5 percent of original size [2021-11-23 02:09:32,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 203 treesize of output 226 [2021-11-23 02:09:32,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:32,757 INFO L354 Elim1Store]: treesize reduction 49, result has 7.5 percent of original size [2021-11-23 02:09:32,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 722 treesize of output 702 [2021-11-23 02:09:32,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:32,782 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-23 02:09:32,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 702 treesize of output 678 [2021-11-23 02:09:33,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:33,116 INFO L354 Elim1Store]: treesize reduction 49, result has 7.5 percent of original size [2021-11-23 02:09:33,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 722 treesize of output 702 [2021-11-23 02:09:33,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:33,130 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-23 02:09:33,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 702 treesize of output 678 [2021-11-23 02:09:33,464 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 42 for LOIs [2021-11-23 02:09:33,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:33,862 INFO L354 Elim1Store]: treesize reduction 58, result has 21.6 percent of original size [2021-11-23 02:09:33,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 61 [2021-11-23 02:09:33,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:33,922 INFO L354 Elim1Store]: treesize reduction 74, result has 24.5 percent of original size [2021-11-23 02:09:33,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 52 treesize of output 66 [2021-11-23 02:09:34,062 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:09:36,903 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '30936#(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 |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) (= |#NULL.offset| 0) (< (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|) (= |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 [2021-11-23 02:09:36,903 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:09:36,903 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:09:36,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 21 [2021-11-23 02:09:36,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047310726] [2021-11-23 02:09:36,904 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:09:36,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-23 02:09:36,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:09:36,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-23 02:09:36,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1834, Unknown=0, NotChecked=0, Total=2070 [2021-11-23 02:09:36,905 INFO L87 Difference]: Start difference. First operand 284 states and 318 transitions. Second operand has 23 states, 19 states have (on average 4.2105263157894735) internal successors, (80), 19 states have internal predecessors, (80), 5 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 02:09:37,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:09:37,322 INFO L93 Difference]: Finished difference Result 297 states and 327 transitions. [2021-11-23 02:09:37,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 02:09:37,323 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 19 states have (on average 4.2105263157894735) internal successors, (80), 19 states have internal predecessors, (80), 5 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 45 [2021-11-23 02:09:37,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:09:37,325 INFO L225 Difference]: With dead ends: 297 [2021-11-23 02:09:37,325 INFO L226 Difference]: Without dead ends: 297 [2021-11-23 02:09:37,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 84 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=370, Invalid=2386, Unknown=0, NotChecked=0, Total=2756 [2021-11-23 02:09:37,326 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 207 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 149 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:09:37,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 392 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 166 Invalid, 0 Unknown, 149 Unchecked, 0.1s Time] [2021-11-23 02:09:37,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-11-23 02:09:37,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 283. [2021-11-23 02:09:37,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 255 states have (on average 1.1411764705882352) internal successors, (291), 266 states have internal predecessors, (291), 8 states have call successors, (8), 8 states have call predecessors, (8), 14 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-11-23 02:09:37,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 314 transitions. [2021-11-23 02:09:37,334 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 314 transitions. Word has length 45 [2021-11-23 02:09:37,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:09:37,334 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 314 transitions. [2021-11-23 02:09:37,334 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 19 states have (on average 4.2105263157894735) internal successors, (80), 19 states have internal predecessors, (80), 5 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 02:09:37,335 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 314 transitions. [2021-11-23 02:09:37,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-23 02:09:37,335 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:09:37,336 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:09:37,375 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-23 02:09:37,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-23 02:09:37,549 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)] === [2021-11-23 02:09:37,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:09:37,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1247243395, now seen corresponding path program 1 times [2021-11-23 02:09:37,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:09:37,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381514635] [2021-11-23 02:09:37,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:09:37,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:09:37,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:09:37,842 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:09:37,842 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:09:37,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381514635] [2021-11-23 02:09:37,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381514635] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:09:37,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818349015] [2021-11-23 02:09:37,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:09:37,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:09:37,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:09:37,844 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:09:37,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-23 02:09:37,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:09:37,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-23 02:09:37,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:09:38,579 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 02:09:38,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 36 [2021-11-23 02:09:38,588 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:09:38,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-23 02:09:38,968 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-23 02:09:38,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 41 [2021-11-23 02:09:38,977 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-23 02:09:38,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 33 [2021-11-23 02:09:39,585 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:09:39,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-11-23 02:09:39,589 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:09:39,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-11-23 02:09:39,656 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:09:39,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:09:39,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818349015] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:09:39,874 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [755491962] [2021-11-23 02:09:39,875 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-23 02:09:39,875 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:09:39,876 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:09:39,876 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:09:39,876 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:09:40,093 INFO L354 Elim1Store]: treesize reduction 176, result has 15.8 percent of original size [2021-11-23 02:09:40,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 204 treesize of output 203 [2021-11-23 02:09:40,153 INFO L354 Elim1Store]: treesize reduction 196, result has 22.5 percent of original size [2021-11-23 02:09:40,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 203 treesize of output 226 [2021-11-23 02:09:40,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:40,613 INFO L354 Elim1Store]: treesize reduction 49, result has 7.5 percent of original size [2021-11-23 02:09:40,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 722 treesize of output 702 [2021-11-23 02:09:40,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:40,637 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-23 02:09:40,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 702 treesize of output 678 [2021-11-23 02:09:41,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:41,029 INFO L354 Elim1Store]: treesize reduction 49, result has 7.5 percent of original size [2021-11-23 02:09:41,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 722 treesize of output 702 [2021-11-23 02:09:41,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:41,046 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-23 02:09:41,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 702 treesize of output 678 [2021-11-23 02:09:41,345 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 42 for LOIs [2021-11-23 02:09:41,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:41,594 INFO L354 Elim1Store]: treesize reduction 58, result has 21.6 percent of original size [2021-11-23 02:09:41,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 61 [2021-11-23 02:09:41,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:41,633 INFO L354 Elim1Store]: treesize reduction 74, result has 24.5 percent of original size [2021-11-23 02:09:41,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 52 treesize of output 66 [2021-11-23 02:09:41,730 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:09:44,206 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '31764#(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_~input#1.base| 5) (= |#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) (<= 0 |parse_input_~i~0#1|) (= |#NULL.base| 0))' at error location [2021-11-23 02:09:44,206 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:09:44,206 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:09:44,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 23 [2021-11-23 02:09:44,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071770996] [2021-11-23 02:09:44,207 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:09:44,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 02:09:44,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:09:44,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 02:09:44,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1940, Unknown=0, NotChecked=0, Total=2162 [2021-11-23 02:09:44,208 INFO L87 Difference]: Start difference. First operand 283 states and 314 transitions. Second operand has 25 states, 20 states have (on average 4.2) internal successors, (84), 19 states have internal predecessors, (84), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 02:09:47,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:09:47,797 INFO L93 Difference]: Finished difference Result 311 states and 336 transitions. [2021-11-23 02:09:47,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-23 02:09:47,798 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 4.2) internal successors, (84), 19 states have internal predecessors, (84), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 47 [2021-11-23 02:09:47,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:09:47,799 INFO L225 Difference]: With dead ends: 311 [2021-11-23 02:09:47,799 INFO L226 Difference]: Without dead ends: 311 [2021-11-23 02:09:47,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 71 SyntacticMatches, 8 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1692 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=531, Invalid=4024, Unknown=1, NotChecked=0, Total=4556 [2021-11-23 02:09:47,801 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 357 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 408 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:09:47,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 535 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 415 Invalid, 0 Unknown, 408 Unchecked, 0.4s Time] [2021-11-23 02:09:47,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-11-23 02:09:47,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 282. [2021-11-23 02:09:47,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 255 states have (on average 1.1254901960784314) internal successors, (287), 265 states have internal predecessors, (287), 8 states have call successors, (8), 8 states have call predecessors, (8), 14 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2021-11-23 02:09:47,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 310 transitions. [2021-11-23 02:09:47,809 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 310 transitions. Word has length 47 [2021-11-23 02:09:47,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:09:47,809 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 310 transitions. [2021-11-23 02:09:47,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 4.2) internal successors, (84), 19 states have internal predecessors, (84), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 02:09:47,810 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 310 transitions. [2021-11-23 02:09:47,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-23 02:09:47,811 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:09:47,811 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:09:47,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-23 02:09:48,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-23 02:09:48,033 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting parse_inputErr7REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:09:48,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:09:48,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1071732509, now seen corresponding path program 1 times [2021-11-23 02:09:48,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:09:48,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801387760] [2021-11-23 02:09:48,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:09:48,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:09:48,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:09:48,206 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:09:48,206 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:09:48,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801387760] [2021-11-23 02:09:48,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801387760] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:09:48,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119429934] [2021-11-23 02:09:48,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:09:48,207 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:09:48,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:09:48,208 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:09:48,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-23 02:09:48,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:09:48,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 02:09:48,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:09:48,539 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:09:48,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-11-23 02:09:48,544 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:09:48,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 17 [2021-11-23 02:09:48,745 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:09:48,745 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 [2021-11-23 02:09:48,833 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-23 02:09:48,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 26 [2021-11-23 02:09:49,169 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:09:49,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:09:49,365 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 02:09:49,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-23 02:09:49,643 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 02:09:49,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2021-11-23 02:09:49,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119429934] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:09:49,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [538005030] [2021-11-23 02:09:49,761 INFO L159 IcfgInterpreter]: Started Sifa with 21 locations of interest [2021-11-23 02:09:49,762 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:09:49,762 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:09:49,762 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:09:49,762 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:09:50,004 INFO L354 Elim1Store]: treesize reduction 176, result has 15.8 percent of original size [2021-11-23 02:09:50,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 204 treesize of output 203 [2021-11-23 02:09:50,101 INFO L354 Elim1Store]: treesize reduction 196, result has 22.5 percent of original size [2021-11-23 02:09:50,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 203 treesize of output 226 [2021-11-23 02:09:50,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:50,557 INFO L354 Elim1Store]: treesize reduction 49, result has 7.5 percent of original size [2021-11-23 02:09:50,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 722 treesize of output 702 [2021-11-23 02:09:50,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:50,588 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-23 02:09:50,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 702 treesize of output 678 [2021-11-23 02:09:51,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:51,054 INFO L354 Elim1Store]: treesize reduction 49, result has 7.5 percent of original size [2021-11-23 02:09:51,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 722 treesize of output 702 [2021-11-23 02:09:51,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:51,071 INFO L354 Elim1Store]: treesize reduction 52, result has 1.9 percent of original size [2021-11-23 02:09:51,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 702 treesize of output 678 [2021-11-23 02:09:51,355 INFO L197 IcfgInterpreter]: Interpreting procedure parse_input with input of size 42 for LOIs [2021-11-23 02:09:51,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:51,622 INFO L354 Elim1Store]: treesize reduction 58, result has 21.6 percent of original size [2021-11-23 02:09:51,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 53 treesize of output 61 [2021-11-23 02:09:51,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:09:51,673 INFO L354 Elim1Store]: treesize reduction 74, result has 24.5 percent of original size [2021-11-23 02:09:51,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 52 treesize of output 66 [2021-11-23 02:09:51,792 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:09:54,324 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '32703#(and (<= |parse_input_~input#1.offset| 0) (< (select |#length| |~#commands~0.base|) (+ (* 9 |parse_input_~i~0#1|) |~#commands~0.offset| 9)) (= (select |#valid| |parse_input_~input#1.base|) 1) (= 6 |~#commands~0.base|) (<= 0 ~global~0.offset) (<= 3 |parse_input_~input#1.base|) (< |parse_input_~input#1.offset| (select |#length| |parse_input_~input#1.base|)) (<= 0 |parse_input_~input#1.offset|) (= |~#commands~0.offset| 0) (<= ~global~0.offset 0) (<= |parse_input_~input#1.base| 5) (= |#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) (<= 0 |parse_input_~i~0#1|) (= |#NULL.base| 0))' at error location [2021-11-23 02:09:54,324 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:09:54,324 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:09:54,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 19 [2021-11-23 02:09:54,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523247851] [2021-11-23 02:09:54,325 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:09:54,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-23 02:09:54,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:09:54,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-23 02:09:54,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=1728, Unknown=0, NotChecked=0, Total=1980 [2021-11-23 02:09:54,326 INFO L87 Difference]: Start difference. First operand 282 states and 310 transitions. Second operand has 21 states, 18 states have (on average 5.0) internal successors, (90), 19 states have internal predecessors, (90), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-23 02:09:54,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:09:54,721 INFO L93 Difference]: Finished difference Result 308 states and 332 transitions. [2021-11-23 02:09:54,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-23 02:09:54,722 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 5.0) internal successors, (90), 19 states have internal predecessors, (90), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 51 [2021-11-23 02:09:54,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:09:54,723 INFO L225 Difference]: With dead ends: 308 [2021-11-23 02:09:54,723 INFO L226 Difference]: Without dead ends: 308 [2021-11-23 02:09:54,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 102 SyntacticMatches, 9 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=426, Invalid=2654, Unknown=0, NotChecked=0, Total=3080 [2021-11-23 02:09:54,724 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 171 mSDsluCounter, 390 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 208 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:09:54,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 425 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 98 Invalid, 0 Unknown, 208 Unchecked, 0.1s Time] [2021-11-23 02:09:54,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2021-11-23 02:09:54,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 244. [2021-11-23 02:09:54,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 221 states have (on average 1.1131221719457014) internal successors, (246), 229 states have internal predecessors, (246), 7 states have call successors, (7), 7 states have call predecessors, (7), 12 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-11-23 02:09:54,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 266 transitions. [2021-11-23 02:09:54,729 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 266 transitions. Word has length 51 [2021-11-23 02:09:54,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:09:54,729 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 266 transitions. [2021-11-23 02:09:54,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 5.0) internal successors, (90), 19 states have internal predecessors, (90), 4 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-23 02:09:54,730 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 266 transitions. [2021-11-23 02:09:54,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-23 02:09:54,731 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:09:54,731 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:09:54,768 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-23 02:09:54,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-23 02:09:54,957 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:09:54,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:09:54,958 INFO L85 PathProgramCache]: Analyzing trace with hash 86206807, now seen corresponding path program 1 times [2021-11-23 02:09:54,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:09:54,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226181803] [2021-11-23 02:09:54,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:09:54,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:09:54,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 02:09:55,000 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-23 02:09:55,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-23 02:09:55,058 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-23 02:09:55,061 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-23 02:09:55,062 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (19 of 20 remaining) [2021-11-23 02:09:55,064 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr0REQUIRES_VIOLATION (18 of 20 remaining) [2021-11-23 02:09:55,065 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr1REQUIRES_VIOLATION (17 of 20 remaining) [2021-11-23 02:09:55,065 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (16 of 20 remaining) [2021-11-23 02:09:55,065 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (15 of 20 remaining) [2021-11-23 02:09:55,065 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE (14 of 20 remaining) [2021-11-23 02:09:55,065 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE (13 of 20 remaining) [2021-11-23 02:09:55,066 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr6REQUIRES_VIOLATION (12 of 20 remaining) [2021-11-23 02:09:55,066 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr7REQUIRES_VIOLATION (11 of 20 remaining) [2021-11-23 02:09:55,066 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr8REQUIRES_VIOLATION (10 of 20 remaining) [2021-11-23 02:09:55,066 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr9REQUIRES_VIOLATION (9 of 20 remaining) [2021-11-23 02:09:55,066 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE (8 of 20 remaining) [2021-11-23 02:09:55,067 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE (7 of 20 remaining) [2021-11-23 02:09:55,067 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr12ASSERT_VIOLATIONMEMORY_FREE (6 of 20 remaining) [2021-11-23 02:09:55,067 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE (5 of 20 remaining) [2021-11-23 02:09:55,067 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr14ASSERT_VIOLATIONMEMORY_FREE (4 of 20 remaining) [2021-11-23 02:09:55,068 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr15ASSERT_VIOLATIONMEMORY_FREE (3 of 20 remaining) [2021-11-23 02:09:55,068 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE (2 of 20 remaining) [2021-11-23 02:09:55,068 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE (1 of 20 remaining) [2021-11-23 02:09:55,068 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE (0 of 20 remaining) [2021-11-23 02:09:55,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-11-23 02:09:55,072 INFO L732 BasicCegarLoop]: Path program histogram: [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, 1, 1] [2021-11-23 02:09:55,077 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 02:09:55,171 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 02:09:55 BoogieIcfgContainer [2021-11-23 02:09:55,172 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 02:09:55,172 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 02:09:55,172 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 02:09:55,173 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 02:09:55,173 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:07:32" (3/4) ... [2021-11-23 02:09:55,176 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-23 02:09:55,176 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 02:09:55,177 INFO L158 Benchmark]: Toolchain (without parser) took 143952.36ms. Allocated memory was 88.1MB in the beginning and 327.2MB in the end (delta: 239.1MB). Free memory was 48.9MB in the beginning and 285.7MB in the end (delta: -236.7MB). Peak memory consumption was 2.3MB. Max. memory is 16.1GB. [2021-11-23 02:09:55,177 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 88.1MB. Free memory is still 66.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:09:55,177 INFO L158 Benchmark]: CACSL2BoogieTranslator took 549.00ms. Allocated memory was 88.1MB in the beginning and 130.0MB in the end (delta: 41.9MB). Free memory was 48.7MB in the beginning and 96.2MB in the end (delta: -47.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-23 02:09:55,177 INFO L158 Benchmark]: Boogie Procedure Inliner took 64.40ms. Allocated memory is still 130.0MB. Free memory was 96.2MB in the beginning and 94.0MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 02:09:55,178 INFO L158 Benchmark]: Boogie Preprocessor took 59.68ms. Allocated memory is still 130.0MB. Free memory was 94.0MB in the beginning and 92.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 02:09:55,178 INFO L158 Benchmark]: RCFGBuilder took 589.56ms. Allocated memory is still 130.0MB. Free memory was 92.4MB in the beginning and 77.3MB in the end (delta: 15.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-23 02:09:55,178 INFO L158 Benchmark]: TraceAbstraction took 142676.06ms. Allocated memory was 130.0MB in the beginning and 327.2MB in the end (delta: 197.1MB). Free memory was 76.8MB in the beginning and 285.7MB in the end (delta: -208.8MB). Peak memory consumption was 170.6MB. Max. memory is 16.1GB. [2021-11-23 02:09:55,178 INFO L158 Benchmark]: Witness Printer took 4.16ms. Allocated memory is still 327.2MB. Free memory is still 285.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 02:09:55,179 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 88.1MB. Free memory is still 66.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 549.00ms. Allocated memory was 88.1MB in the beginning and 130.0MB in the end (delta: 41.9MB). Free memory was 48.7MB in the beginning and 96.2MB in the end (delta: -47.4MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 64.40ms. Allocated memory is still 130.0MB. Free memory was 96.2MB in the beginning and 94.0MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 59.68ms. Allocated memory is still 130.0MB. Free memory was 94.0MB in the beginning and 92.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 589.56ms. Allocated memory is still 130.0MB. Free memory was 92.4MB in the beginning and 77.3MB in the end (delta: 15.1MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 142676.06ms. Allocated memory was 130.0MB in the beginning and 327.2MB in the end (delta: 197.1MB). Free memory was 76.8MB in the beginning and 285.7MB in the end (delta: -208.8MB). Peak memory consumption was 170.6MB. Max. memory is 16.1GB. * Witness Printer took 4.16ms. Allocated memory is still 327.2MB. Free memory is still 285.7MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 721]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of strcmp at line 693, overapproximation of memtrack at line 721. Possible FailurePath: [L685] int state = STATE_1; [L686] char *global = 0; [L687-L690] const struct command commands[] = { {"c1",c1,STATE_1}, {"c2",c2,STATE_2} }; [L722] CALL parse_input("c1") VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, state=0] [L692] int i = 0; VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].name={1:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] COND TRUE strcmp(commands[i].name,input) == 0 [L694] EXPR commands[i].state_needed VAL [\old(global)=0, \old(global)=0, \old(state)=0, commands={6:0}, commands[i].state_needed=0, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L694] COND TRUE state >= commands[i].state_needed [L695] EXPR commands[i].function [L695] CALL commands[i].function() [L702] char *x = (char *)malloc(sizeof(char)); [L703] COND FALSE !(!x) [L706] COND FALSE !(\read(*global)) [L708] global = x [L709] state = STATE_2 [L695] RET commands[i].function() [L722] RET parse_input("c1") VAL [commands={6:0}, global={-3:0}, state=1] [L723] CALL parse_input("c1") VAL [\old(global)=-3, \old(global)=0, \old(state)=1, commands={6:0}, global={-3:0}, state=1] [L692] int i = 0; VAL [\old(global)=0, \old(global)=-3, \old(state)=1, commands={6:0}, global={-3:0}, i=0, input={4:0}, input={4:0}, state=1] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=-3, \old(state)=1, commands={6:0}, global={-3:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR commands[i].name VAL [\old(global)=-3, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={-3:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=-3, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={-3:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=-3, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={-3:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=-3, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={-3:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=-3, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={-3:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] COND TRUE strcmp(commands[i].name,input) == 0 [L694] EXPR commands[i].state_needed VAL [\old(global)=-3, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].state_needed=0, global={-3:0}, i=0, input={4:0}, input={4:0}, state=1] [L694] COND TRUE state >= commands[i].state_needed [L695] EXPR commands[i].function [L695] CALL commands[i].function() [L702] char *x = (char *)malloc(sizeof(char)); [L703] COND FALSE !(!x) [L706] COND TRUE \read(*global) [L708] global = x [L709] state = STATE_2 [L695] RET commands[i].function() [L723] RET parse_input("c1") VAL [commands={6:0}, global={7:0}, state=1] [L724] CALL parse_input("c2") VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, global={7:0}, state=1] [L692] int i = 0; VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L692] COND TRUE i < 2 VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR commands[i].name VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=7, \old(global)=0, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].name={1:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] COND TRUE strcmp(commands[i].name,input) == 0 [L694] EXPR commands[i].state_needed VAL [\old(global)=0, \old(global)=7, \old(state)=1, commands={6:0}, commands[i].state_needed=0, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L694] COND TRUE state >= commands[i].state_needed [L695] EXPR commands[i].function [L695] CALL commands[i].function() [L702] char *x = (char *)malloc(sizeof(char)); [L703] COND FALSE !(!x) [L706] COND TRUE \read(*global) [L708] global = x [L709] state = STATE_2 [L695] RET commands[i].function() [L724] RET parse_input("c2") VAL [commands={6:0}, global={-6:0}, state=1] [L725] return 0; VAL [\result=0, commands={6:0}, global={-6:0}, state=1] - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 694]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 695]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 695]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 54 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 142.5s, OverallIterations: 41, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.1s, AutomataDifference: 17.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 9022 SdHoareTripleChecker+Valid, 5.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 9015 mSDsluCounter, 11684 SdHoareTripleChecker+Invalid, 4.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 3268 IncrementalHoareTripleChecker+Unchecked, 9762 mSDsCounter, 1119 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6925 IncrementalHoareTripleChecker+Invalid, 11312 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1119 mSolverCounterUnsat, 2149 mSDtfsCounter, 6925 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2597 GetRequests, 1395 SyntacticMatches, 131 SemanticMatches, 1071 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17691 ImplicationChecksByTransitivity, 77.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=541occurred in iteration=24, InterpolantAutomatonStates: 501, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 40 MinimizatonAttempts, 2014 StatesRemovedByMinimization, 37 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.4s SatisfiabilityAnalysisTime, 20.1s InterpolantComputationTime, 2033 NumberOfCodeBlocks, 2025 NumberOfCodeBlocksAsserted, 67 NumberOfCheckSat, 2116 ConstructedInterpolants, 270 QuantifiedInterpolants, 27629 SizeOfPredicates, 110 NumberOfNonLiveVariables, 5861 ConjunctsInSsa, 492 ConjunctsInUnsatCore, 72 InterpolantComputations, 17 PerfectInterpolantSequences, 529/1253 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: 2.0s, ICFG_INTERPRETER_ENTERED_PROCEDURES: 2, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 11, DAG_INTERPRETER_EARLY_EXITS: 0, TOOLS_POST_APPLICATIONS: 28, TOOLS_POST_TIME: 1.7s, TOOLS_POST_CALL_APPLICATIONS: 1, TOOLS_POST_CALL_TIME: 0.0s, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME: 0.0s, TOOLS_QUANTIFIERELIM_APPLICATIONS: 29, TOOLS_QUANTIFIERELIM_TIME: 1.7s, TOOLS_QUANTIFIERELIM_MAX_TIME: 0.3s, FLUID_QUERY_TIME: 0.0s, FLUID_QUERIES: 48, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 2, DOMAIN_JOIN_TIME: 0.0s, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME: 0.0s, DOMAIN_WIDEN_APPLICATIONS: 1, DOMAIN_WIDEN_TIME: 0.1s, DOMAIN_ISSUBSETEQ_APPLICATIONS: 2, DOMAIN_ISSUBSETEQ_TIME: 0.0s, DOMAIN_ISBOTTOM_APPLICATIONS: 11, DOMAIN_ISBOTTOM_TIME: 0.1s, LOOP_SUMMARIZER_APPLICATIONS: 1, LOOP_SUMMARIZER_CACHE_MISSES: 1, LOOP_SUMMARIZER_OVERALL_TIME: 1.0s, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME: 1.0s, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 2, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME: 0.0s, CALL_SUMMARIZER_NEW_COMPUTATION_TIME: 0.0s, 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: 104, DAG_COMPRESSION_RETAINED_NODES: 44, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-11-23 02:09:55,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/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_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6826aeecba49275836b6b398765a757158a4e84d2c6569399d77f2320562875e --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:09:57,703 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:09:57,705 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:09:57,742 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:09:57,743 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:09:57,748 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:09:57,750 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:09:57,755 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:09:57,759 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:09:57,766 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:09:57,768 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:09:57,770 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:09:57,771 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:09:57,774 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:09:57,776 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:09:57,781 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:09:57,783 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:09:57,785 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:09:57,792 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:09:57,800 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:09:57,803 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:09:57,804 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:09:57,807 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:09:57,810 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:09:57,819 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:09:57,819 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:09:57,820 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:09:57,822 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:09:57,823 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:09:57,824 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:09:57,825 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:09:57,826 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:09:57,829 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:09:57,830 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:09:57,831 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:09:57,832 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:09:57,833 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:09:57,833 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:09:57,834 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:09:57,836 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:09:57,836 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:09:57,842 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-23 02:09:57,875 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:09:57,875 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:09:57,876 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:09:57,876 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:09:57,877 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:09:57,877 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:09:57,877 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:09:57,878 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:09:57,878 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:09:57,878 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:09:57,878 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:09:57,879 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:09:57,879 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 02:09:57,880 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 02:09:57,880 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:09:57,880 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:09:57,880 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 02:09:57,881 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:09:57,881 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:09:57,881 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:09:57,881 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 02:09:57,882 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 02:09:57,882 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 02:09:57,882 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:09:57,882 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 02:09:57,883 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 02:09:57,883 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 02:09:57,883 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:09:57,883 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:09:57,884 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:09:57,884 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 02:09:57,884 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:09:57,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:09:57,885 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:09:57,885 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:09:57,885 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 02:09:57,886 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 02:09:57,886 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:09:57,886 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:09:57,886 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_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6826aeecba49275836b6b398765a757158a4e84d2c6569399d77f2320562875e [2021-11-23 02:09:58,296 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:09:58,323 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:09:58,326 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:09:58,327 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:09:58,328 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:09:58,330 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i [2021-11-23 02:09:58,415 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/data/b394fa9b3/3e7d7772365f47e3bba510d37b970a26/FLAGe8e00ab2b [2021-11-23 02:09:59,134 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:09:59,135 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/sv-benchmarks/c/memsafety-bftpd/bftpd_3.i [2021-11-23 02:09:59,158 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/data/b394fa9b3/3e7d7772365f47e3bba510d37b970a26/FLAGe8e00ab2b [2021-11-23 02:09:59,380 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/data/b394fa9b3/3e7d7772365f47e3bba510d37b970a26 [2021-11-23 02:09:59,382 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:09:59,384 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:09:59,386 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:09:59,386 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:09:59,390 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:09:59,391 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:09:59" (1/1) ... [2021-11-23 02:09:59,392 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ad75941 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:59, skipping insertion in model container [2021-11-23 02:09:59,392 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:09:59" (1/1) ... [2021-11-23 02:09:59,400 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:09:59,458 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:09:59,828 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:09:59,841 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:09:59,913 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:09:59,969 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:09:59,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:59 WrapperNode [2021-11-23 02:09:59,970 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:09:59,972 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:09:59,972 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:09:59,973 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:09:59,980 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:59" (1/1) ... [2021-11-23 02:10:00,020 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:59" (1/1) ... [2021-11-23 02:10:00,061 INFO L137 Inliner]: procedures = 169, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 96 [2021-11-23 02:10:00,062 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:10:00,063 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:10:00,063 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:10:00,064 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:10:00,073 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:59" (1/1) ... [2021-11-23 02:10:00,073 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:59" (1/1) ... [2021-11-23 02:10:00,092 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:59" (1/1) ... [2021-11-23 02:10:00,093 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:59" (1/1) ... [2021-11-23 02:10:00,102 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:59" (1/1) ... [2021-11-23 02:10:00,130 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:59" (1/1) ... [2021-11-23 02:10:00,132 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:59" (1/1) ... [2021-11-23 02:10:00,136 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:10:00,137 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:10:00,137 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:10:00,137 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:10:00,138 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:59" (1/1) ... [2021-11-23 02:10:00,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:10:00,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:10:00,169 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:10:00,201 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:10:00,220 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-23 02:10:00,220 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2021-11-23 02:10:00,220 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2021-11-23 02:10:00,221 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:10:00,222 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:10:00,222 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:10:00,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:10:00,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:10:00,223 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 02:10:00,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:10:00,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:10:00,398 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:10:00,400 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:10:00,779 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:10:00,786 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:10:00,789 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 02:10:00,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:10:00 BoogieIcfgContainer [2021-11-23 02:10:00,793 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:10:00,794 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:10:00,796 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:10:00,799 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:10:00,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:09:59" (1/3) ... [2021-11-23 02:10:00,800 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@528c357b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:10:00, skipping insertion in model container [2021-11-23 02:10:00,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:09:59" (2/3) ... [2021-11-23 02:10:00,801 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@528c357b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:10:00, skipping insertion in model container [2021-11-23 02:10:00,801 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:10:00" (3/3) ... [2021-11-23 02:10:00,803 INFO L111 eAbstractionObserver]: Analyzing ICFG bftpd_3.i [2021-11-23 02:10:00,812 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:10:00,813 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2021-11-23 02:10:00,871 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:10:00,890 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:10:00,901 INFO L340 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2021-11-23 02:10:00,923 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) [2021-11-23 02:10:00,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 02:10:00,931 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:00,932 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 02:10:00,934 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)] === [2021-11-23 02:10:00,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:00,940 INFO L85 PathProgramCache]: Analyzing trace with hash -772449407, now seen corresponding path program 1 times [2021-11-23 02:10:00,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:10:00,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1257904243] [2021-11-23 02:10:00,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:00,957 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:10:00,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:10:00,964 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:10:01,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 02:10:01,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:01,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:10:01,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:10:01,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:01,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:10:01,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:01,330 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:10:01,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1257904243] [2021-11-23 02:10:01,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1257904243] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:10:01,332 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:10:01,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-11-23 02:10:01,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529489064] [2021-11-23 02:10:01,337 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:10:01,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:10:01,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:10:01,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:10:01,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:10:01,381 INFO L87 Difference]: Start difference. First operand has 61 states, 36 states have (on average 1.7777777777777777) internal successors, (64), 56 states have internal predecessors, (64), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:10:01,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:10:01,687 INFO L93 Difference]: Finished difference Result 120 states and 141 transitions. [2021-11-23 02:10:01,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:10:01,691 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 02:10:01,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:10:01,702 INFO L225 Difference]: With dead ends: 120 [2021-11-23 02:10:01,702 INFO L226 Difference]: Without dead ends: 114 [2021-11-23 02:10:01,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:10:01,708 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 100 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:10:01,709 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 118 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:10:01,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-23 02:10:01,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2021-11-23 02:10:01,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 60 states have (on average 1.65) internal successors, (99), 77 states have internal predecessors, (99), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-11-23 02:10:01,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 117 transitions. [2021-11-23 02:10:01,763 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 117 transitions. Word has length 6 [2021-11-23 02:10:01,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:10:01,764 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 117 transitions. [2021-11-23 02:10:01,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:10:01,765 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 117 transitions. [2021-11-23 02:10:01,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-23 02:10:01,766 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:01,766 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-23 02:10:01,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:10:01,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:10:01,978 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)] === [2021-11-23 02:10:01,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:01,979 INFO L85 PathProgramCache]: Analyzing trace with hash -772449406, now seen corresponding path program 1 times [2021-11-23 02:10:01,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:10:01,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1408694513] [2021-11-23 02:10:01,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:01,981 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:10:01,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:10:01,983 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:10:01,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 02:10:02,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:02,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:10:02,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:10:02,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:02,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:10:02,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:02,565 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:10:02,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1408694513] [2021-11-23 02:10:02,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1408694513] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:10:02,565 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:10:02,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 4 [2021-11-23 02:10:02,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483639703] [2021-11-23 02:10:02,566 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:10:02,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:10:02,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:10:02,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:10:02,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:10:02,569 INFO L87 Difference]: Start difference. First operand 87 states and 117 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:10:03,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:10:03,201 INFO L93 Difference]: Finished difference Result 223 states and 301 transitions. [2021-11-23 02:10:03,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:10:03,203 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-23 02:10:03,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:10:03,206 INFO L225 Difference]: With dead ends: 223 [2021-11-23 02:10:03,206 INFO L226 Difference]: Without dead ends: 223 [2021-11-23 02:10:03,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:10:03,208 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 223 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:10:03,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [223 Valid, 209 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:10:03,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-11-23 02:10:03,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 168. [2021-11-23 02:10:03,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 133 states have (on average 1.6466165413533835) internal successors, (219), 151 states have internal predecessors, (219), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2021-11-23 02:10:03,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 256 transitions. [2021-11-23 02:10:03,238 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 256 transitions. Word has length 6 [2021-11-23 02:10:03,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:10:03,239 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 256 transitions. [2021-11-23 02:10:03,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:10:03,239 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 256 transitions. [2021-11-23 02:10:03,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-23 02:10:03,240 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:03,240 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:10:03,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:10:03,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:10:03,453 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)] === [2021-11-23 02:10:03,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:03,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1823872140, now seen corresponding path program 1 times [2021-11-23 02:10:03,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:10:03,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [108232477] [2021-11-23 02:10:03,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:03,456 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:10:03,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:10:03,457 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:10:03,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 02:10:03,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:03,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 02:10:03,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:10:03,740 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 [2021-11-23 02:10:03,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:03,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:10:03,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:03,845 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:10:03,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [108232477] [2021-11-23 02:10:03,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [108232477] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:10:03,846 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:10:03,846 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-11-23 02:10:03,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557398980] [2021-11-23 02:10:03,846 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:10:03,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:10:03,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:10:03,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:10:03,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:10:03,848 INFO L87 Difference]: Start difference. First operand 168 states and 256 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:10:04,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:10:04,302 INFO L93 Difference]: Finished difference Result 246 states and 351 transitions. [2021-11-23 02:10:04,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:10:04,303 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-23 02:10:04,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:10:04,307 INFO L225 Difference]: With dead ends: 246 [2021-11-23 02:10:04,307 INFO L226 Difference]: Without dead ends: 246 [2021-11-23 02:10:04,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:10:04,309 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 145 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:10:04,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 272 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:10:04,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-11-23 02:10:04,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 171. [2021-11-23 02:10:04,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 136 states have (on average 1.6323529411764706) internal successors, (222), 154 states have internal predecessors, (222), 10 states have call successors, (10), 6 states have call predecessors, (10), 7 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2021-11-23 02:10:04,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 259 transitions. [2021-11-23 02:10:04,345 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 259 transitions. Word has length 7 [2021-11-23 02:10:04,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:10:04,345 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 259 transitions. [2021-11-23 02:10:04,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:10:04,346 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 259 transitions. [2021-11-23 02:10:04,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 02:10:04,346 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:04,346 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:10:04,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:10:04,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:10:04,561 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)] === [2021-11-23 02:10:04,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:04,561 INFO L85 PathProgramCache]: Analyzing trace with hash 705461537, now seen corresponding path program 1 times [2021-11-23 02:10:04,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:10:04,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [563677698] [2021-11-23 02:10:04,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:04,562 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:10:04,562 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:10:04,563 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:10:04,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 02:10:04,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:04,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 02:10:04,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:10:04,778 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 29 treesize of output 21 [2021-11-23 02:10:04,784 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 [2021-11-23 02:10:04,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:04,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:10:04,920 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:04,920 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:10:04,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [563677698] [2021-11-23 02:10:04,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [563677698] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:10:04,921 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:10:04,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-11-23 02:10:04,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704823180] [2021-11-23 02:10:04,921 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:10:04,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:10:04,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:10:04,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:10:04,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:10:04,923 INFO L87 Difference]: Start difference. First operand 171 states and 259 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:10:05,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:10:05,651 INFO L93 Difference]: Finished difference Result 352 states and 461 transitions. [2021-11-23 02:10:05,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 02:10:05,652 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-23 02:10:05,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:10:05,656 INFO L225 Difference]: With dead ends: 352 [2021-11-23 02:10:05,656 INFO L226 Difference]: Without dead ends: 352 [2021-11-23 02:10:05,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-11-23 02:10:05,658 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 286 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:10:05,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 324 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:10:05,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2021-11-23 02:10:05,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 240. [2021-11-23 02:10:05,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 199 states have (on average 1.5979899497487438) internal successors, (318), 221 states have internal predecessors, (318), 11 states have call successors, (11), 7 states have call predecessors, (11), 12 states have return successors, (40), 11 states have call predecessors, (40), 11 states have call successors, (40) [2021-11-23 02:10:05,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 369 transitions. [2021-11-23 02:10:05,683 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 369 transitions. Word has length 8 [2021-11-23 02:10:05,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:10:05,684 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 369 transitions. [2021-11-23 02:10:05,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:10:05,684 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 369 transitions. [2021-11-23 02:10:05,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 02:10:05,685 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:05,685 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:10:05,696 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-23 02:10:05,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:10:05,896 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)] === [2021-11-23 02:10:05,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:05,897 INFO L85 PathProgramCache]: Analyzing trace with hash 394471214, now seen corresponding path program 1 times [2021-11-23 02:10:05,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:10:05,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [224088179] [2021-11-23 02:10:05,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:05,898 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:10:05,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:10:05,903 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:10:05,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 02:10:05,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:05,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:10:05,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:10:06,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:06,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:10:06,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:06,058 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:10:06,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [224088179] [2021-11-23 02:10:06,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [224088179] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:10:06,059 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:10:06,059 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-11-23 02:10:06,059 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339807575] [2021-11-23 02:10:06,059 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:10:06,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:10:06,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:10:06,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:10:06,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:10:06,066 INFO L87 Difference]: Start difference. First operand 240 states and 369 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:10:06,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:10:06,350 INFO L93 Difference]: Finished difference Result 344 states and 478 transitions. [2021-11-23 02:10:06,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:10:06,352 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-23 02:10:06,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:10:06,355 INFO L225 Difference]: With dead ends: 344 [2021-11-23 02:10:06,355 INFO L226 Difference]: Without dead ends: 344 [2021-11-23 02:10:06,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:10:06,356 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 286 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:10:06,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 232 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:10:06,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-11-23 02:10:06,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 282. [2021-11-23 02:10:06,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 238 states have (on average 1.5630252100840336) internal successors, (372), 262 states have internal predecessors, (372), 11 states have call successors, (11), 8 states have call predecessors, (11), 15 states have return successors, (39), 11 states have call predecessors, (39), 11 states have call successors, (39) [2021-11-23 02:10:06,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 422 transitions. [2021-11-23 02:10:06,385 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 422 transitions. Word has length 9 [2021-11-23 02:10:06,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:10:06,386 INFO L470 AbstractCegarLoop]: Abstraction has 282 states and 422 transitions. [2021-11-23 02:10:06,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:10:06,386 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 422 transitions. [2021-11-23 02:10:06,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 02:10:06,387 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:06,387 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:10:06,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:10:06,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:10:06,598 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)] === [2021-11-23 02:10:06,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:06,599 INFO L85 PathProgramCache]: Analyzing trace with hash -656294205, now seen corresponding path program 1 times [2021-11-23 02:10:06,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:10:06,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1235818784] [2021-11-23 02:10:06,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:06,600 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:10:06,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:10:06,601 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:10:06,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 02:10:06,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:06,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 02:10:06,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:10:06,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:06,755 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:10:06,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:06,825 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:10:06,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1235818784] [2021-11-23 02:10:06,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1235818784] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:10:06,825 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:10:06,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-11-23 02:10:06,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716534536] [2021-11-23 02:10:06,826 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:10:06,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:10:06,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:10:06,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:10:06,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:10:06,828 INFO L87 Difference]: Start difference. First operand 282 states and 422 transitions. Second operand has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:10:07,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:10:07,292 INFO L93 Difference]: Finished difference Result 343 states and 450 transitions. [2021-11-23 02:10:07,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:10:07,293 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-23 02:10:07,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:10:07,295 INFO L225 Difference]: With dead ends: 343 [2021-11-23 02:10:07,296 INFO L226 Difference]: Without dead ends: 343 [2021-11-23 02:10:07,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:10:07,297 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 345 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:10:07,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 266 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:10:07,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-11-23 02:10:07,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 283. [2021-11-23 02:10:07,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 239 states have (on average 1.5606694560669456) internal successors, (373), 263 states have internal predecessors, (373), 11 states have call successors, (11), 8 states have call predecessors, (11), 15 states have return successors, (32), 11 states have call predecessors, (32), 11 states have call successors, (32) [2021-11-23 02:10:07,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 416 transitions. [2021-11-23 02:10:07,314 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 416 transitions. Word has length 10 [2021-11-23 02:10:07,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:10:07,315 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 416 transitions. [2021-11-23 02:10:07,315 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:10:07,315 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 416 transitions. [2021-11-23 02:10:07,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-23 02:10:07,316 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:07,316 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:10:07,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:10:07,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:10:07,528 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:10:07,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:07,529 INFO L85 PathProgramCache]: Analyzing trace with hash 396669285, now seen corresponding path program 1 times [2021-11-23 02:10:07,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:10:07,529 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1260796522] [2021-11-23 02:10:07,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:07,530 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:10:07,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:10:07,531 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:10:07,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 02:10:07,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:07,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:10:07,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:10:07,862 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 [2021-11-23 02:10:07,874 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:07,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:10:08,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:08,039 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:10:08,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1260796522] [2021-11-23 02:10:08,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1260796522] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:10:08,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [26074735] [2021-11-23 02:10:08,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:08,040 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:10:08,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:10:08,043 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:10:08,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-23 02:10:08,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:08,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 02:10:08,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:10:08,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-11-23 02:10:08,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:08,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:10:08,703 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:08,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [26074735] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:10:08,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752642790] [2021-11-23 02:10:08,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:08,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:10:08,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:10:08,705 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:10:08,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 02:10:08,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:08,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 02:10:08,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:10:09,210 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 [2021-11-23 02:10:09,219 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:09,220 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:10:09,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:09,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752642790] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:10:09,719 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:10:09,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 18 [2021-11-23 02:10:09,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597859832] [2021-11-23 02:10:09,720 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:10:09,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 02:10:09,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:10:09,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 02:10:09,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-11-23 02:10:09,722 INFO L87 Difference]: Start difference. First operand 283 states and 416 transitions. Second operand has 20 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 19 states have internal predecessors, (68), 5 states have call successors, (5), 5 states have call predecessors, (5), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:10:12,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:10:12,050 INFO L93 Difference]: Finished difference Result 681 states and 929 transitions. [2021-11-23 02:10:12,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-23 02:10:12,051 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 [2021-11-23 02:10:12,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:10:12,056 INFO L225 Difference]: With dead ends: 681 [2021-11-23 02:10:12,056 INFO L226 Difference]: Without dead ends: 681 [2021-11-23 02:10:12,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=351, Invalid=1131, Unknown=0, NotChecked=0, Total=1482 [2021-11-23 02:10:12,060 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 1047 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1047 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:10:12,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1047 Valid, 730 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-23 02:10:12,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-11-23 02:10:12,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 350. [2021-11-23 02:10:12,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 305 states have (on average 1.5475409836065575) internal successors, (472), 330 states have internal predecessors, (472), 11 states have call successors, (11), 8 states have call predecessors, (11), 16 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2021-11-23 02:10:12,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 517 transitions. [2021-11-23 02:10:12,091 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 517 transitions. Word has length 15 [2021-11-23 02:10:12,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:10:12,092 INFO L470 AbstractCegarLoop]: Abstraction has 350 states and 517 transitions. [2021-11-23 02:10:12,092 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) [2021-11-23 02:10:12,092 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 517 transitions. [2021-11-23 02:10:12,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 02:10:12,093 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:12,094 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:10:12,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:10:12,326 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-23 02:10:12,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-23 02:10:12,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:10:12,706 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:10:12,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:12,707 INFO L85 PathProgramCache]: Analyzing trace with hash -588154008, now seen corresponding path program 1 times [2021-11-23 02:10:12,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:10:12,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1830956976] [2021-11-23 02:10:12,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:12,707 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:10:12,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:10:12,708 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:10:12,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 02:10:12,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:12,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 02:10:12,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:10:13,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-23 02:10:13,105 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 [2021-11-23 02:10:13,137 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:13,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:10:13,378 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:13,378 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:10:13,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1830956976] [2021-11-23 02:10:13,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1830956976] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:10:13,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1938757198] [2021-11-23 02:10:13,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:13,379 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:10:13,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:10:13,380 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:10:13,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-23 02:10:13,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:13,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 02:10:13,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:10:13,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-23 02:10:13,783 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 [2021-11-23 02:10:13,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:13,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:10:13,923 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:13,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1938757198] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:10:13,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551196102] [2021-11-23 02:10:13,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:13,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:10:13,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:10:13,925 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:10:13,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 02:10:14,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:14,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 02:10:14,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:10:14,480 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 [2021-11-23 02:10:14,486 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 [2021-11-23 02:10:14,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:14,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:10:15,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:15,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551196102] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:10:15,115 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:10:15,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 15 [2021-11-23 02:10:15,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765751636] [2021-11-23 02:10:15,115 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:10:15,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 02:10:15,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:10:15,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 02:10:15,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-11-23 02:10:15,117 INFO L87 Difference]: Start difference. First operand 350 states and 517 transitions. Second operand has 17 states, 16 states have (on average 3.625) internal successors, (58), 16 states have internal predecessors, (58), 4 states have call successors, (4), 4 states have call predecessors, (4), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:10:17,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:10:17,847 INFO L93 Difference]: Finished difference Result 764 states and 1025 transitions. [2021-11-23 02:10:17,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-23 02:10:17,849 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 [2021-11-23 02:10:17,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:10:17,854 INFO L225 Difference]: With dead ends: 764 [2021-11-23 02:10:17,854 INFO L226 Difference]: Without dead ends: 764 [2021-11-23 02:10:17,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2021-11-23 02:10:17,855 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 880 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 880 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:10:17,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [880 Valid, 935 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-23 02:10:17,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2021-11-23 02:10:17,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 383. [2021-11-23 02:10:17,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 338 states have (on average 1.532544378698225) internal successors, (518), 363 states have internal predecessors, (518), 11 states have call successors, (11), 8 states have call predecessors, (11), 16 states have return successors, (34), 11 states have call predecessors, (34), 11 states have call successors, (34) [2021-11-23 02:10:17,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 563 transitions. [2021-11-23 02:10:17,890 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 563 transitions. Word has length 16 [2021-11-23 02:10:17,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:10:17,891 INFO L470 AbstractCegarLoop]: Abstraction has 383 states and 563 transitions. [2021-11-23 02:10:17,891 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) [2021-11-23 02:10:17,891 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 563 transitions. [2021-11-23 02:10:17,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 02:10:17,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:17,893 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:10:17,899 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (12)] Ended with exit code 0 [2021-11-23 02:10:18,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 02:10:18,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 02:10:18,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:10:18,499 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:10:18,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:18,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1776199734, now seen corresponding path program 1 times [2021-11-23 02:10:18,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:10:18,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1085792438] [2021-11-23 02:10:18,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:18,500 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:10:18,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:10:18,502 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:10:18,533 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 02:10:18,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:18,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:10:18,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:10:18,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:18,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:10:18,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:18,670 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:10:18,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1085792438] [2021-11-23 02:10:18,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1085792438] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:10:18,671 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:10:18,671 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 1 [2021-11-23 02:10:18,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466423454] [2021-11-23 02:10:18,671 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:10:18,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:10:18,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:10:18,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:10:18,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:10:18,672 INFO L87 Difference]: Start difference. First operand 383 states and 563 transitions. Second operand has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:10:18,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:10:18,698 INFO L93 Difference]: Finished difference Result 527 states and 771 transitions. [2021-11-23 02:10:18,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:10:18,699 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-23 02:10:18,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:10:18,705 INFO L225 Difference]: With dead ends: 527 [2021-11-23 02:10:18,705 INFO L226 Difference]: Without dead ends: 527 [2021-11-23 02:10:18,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:10:18,709 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 47 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:10:18,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 108 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:10:18,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-11-23 02:10:18,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 510. [2021-11-23 02:10:18,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 453 states have (on average 1.5253863134657837) internal successors, (691), 483 states have internal predecessors, (691), 15 states have call successors, (15), 11 states have call predecessors, (15), 24 states have return successors, (57), 15 states have call predecessors, (57), 15 states have call successors, (57) [2021-11-23 02:10:18,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 763 transitions. [2021-11-23 02:10:18,740 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 763 transitions. Word has length 18 [2021-11-23 02:10:18,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:10:18,741 INFO L470 AbstractCegarLoop]: Abstraction has 510 states and 763 transitions. [2021-11-23 02:10:18,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.5) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:10:18,741 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 763 transitions. [2021-11-23 02:10:18,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 02:10:18,742 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:18,742 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:10:18,763 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 02:10:18,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:10:18,963 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:10:18,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:18,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1776199478, now seen corresponding path program 1 times [2021-11-23 02:10:18,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:10:18,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [407456569] [2021-11-23 02:10:18,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:18,965 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:10:18,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:10:18,966 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:10:19,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 02:10:19,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:19,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:10:19,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:10:19,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:19,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:10:19,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:19,212 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:10:19,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [407456569] [2021-11-23 02:10:19,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [407456569] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:10:19,212 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:10:19,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-23 02:10:19,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193191599] [2021-11-23 02:10:19,213 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:10:19,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:10:19,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:10:19,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:10:19,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:10:19,214 INFO L87 Difference]: Start difference. First operand 510 states and 763 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:10:19,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:10:19,253 INFO L93 Difference]: Finished difference Result 560 states and 804 transitions. [2021-11-23 02:10:19,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:10:19,254 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 [2021-11-23 02:10:19,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:10:19,258 INFO L225 Difference]: With dead ends: 560 [2021-11-23 02:10:19,259 INFO L226 Difference]: Without dead ends: 560 [2021-11-23 02:10:19,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:10:19,260 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 32 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:10:19,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 108 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:10:19,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-11-23 02:10:19,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 542. [2021-11-23 02:10:19,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 482 states have (on average 1.495850622406639) internal successors, (721), 513 states have internal predecessors, (721), 16 states have call successors, (16), 12 states have call predecessors, (16), 26 states have return successors, (59), 16 states have call predecessors, (59), 16 states have call successors, (59) [2021-11-23 02:10:19,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 796 transitions. [2021-11-23 02:10:19,282 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 796 transitions. Word has length 18 [2021-11-23 02:10:19,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:10:19,284 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 796 transitions. [2021-11-23 02:10:19,284 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) [2021-11-23 02:10:19,284 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 796 transitions. [2021-11-23 02:10:19,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 02:10:19,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:19,285 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:10:19,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 02:10:19,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:10:19,496 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:10:19,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:19,497 INFO L85 PathProgramCache]: Analyzing trace with hash 772383166, now seen corresponding path program 1 times [2021-11-23 02:10:19,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:10:19,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [442607620] [2021-11-23 02:10:19,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:19,498 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:10:19,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:10:19,499 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:10:19,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 02:10:19,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:19,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:10:19,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:10:19,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:19,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:10:19,723 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:19,723 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:10:19,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [442607620] [2021-11-23 02:10:19,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [442607620] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:10:19,724 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:10:19,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1, 1] imperfect sequences [] total 2 [2021-11-23 02:10:19,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708988392] [2021-11-23 02:10:19,724 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:10:19,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:10:19,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:10:19,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:10:19,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:10:19,725 INFO L87 Difference]: Start difference. First operand 542 states and 796 transitions. Second operand has 4 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:10:19,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:10:19,825 INFO L93 Difference]: Finished difference Result 574 states and 804 transitions. [2021-11-23 02:10:19,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:10:19,826 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-23 02:10:19,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:10:19,830 INFO L225 Difference]: With dead ends: 574 [2021-11-23 02:10:19,830 INFO L226 Difference]: Without dead ends: 574 [2021-11-23 02:10:19,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:10:19,831 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 92 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:10:19,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 149 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:10:19,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2021-11-23 02:10:19,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 544. [2021-11-23 02:10:19,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 484 states have (on average 1.4834710743801653) internal successors, (718), 515 states have internal predecessors, (718), 16 states have call successors, (16), 12 states have call predecessors, (16), 26 states have return successors, (59), 16 states have call predecessors, (59), 16 states have call successors, (59) [2021-11-23 02:10:19,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 793 transitions. [2021-11-23 02:10:19,855 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 793 transitions. Word has length 19 [2021-11-23 02:10:19,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:10:19,857 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 793 transitions. [2021-11-23 02:10:19,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:10:19,857 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 793 transitions. [2021-11-23 02:10:19,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 02:10:19,861 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:19,861 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2021-11-23 02:10:19,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 02:10:20,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:10:20,073 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)] === [2021-11-23 02:10:20,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:20,073 INFO L85 PathProgramCache]: Analyzing trace with hash 323759248, now seen corresponding path program 1 times [2021-11-23 02:10:20,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:10:20,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [597449016] [2021-11-23 02:10:20,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:20,074 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:10:20,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:10:20,075 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:10:20,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 02:10:20,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:20,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:10:20,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:10:20,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:20,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:10:20,302 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:20,302 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:10:20,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [597449016] [2021-11-23 02:10:20,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [597449016] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:10:20,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [30548175] [2021-11-23 02:10:20,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:20,303 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:10:20,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:10:20,304 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:10:20,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-11-23 02:10:20,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:20,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:10:20,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:10:20,513 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:20,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:10:20,576 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:20,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [30548175] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:10:20,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248222263] [2021-11-23 02:10:20,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:20,577 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:10:20,577 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:10:20,578 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:10:20,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-23 02:10:20,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:20,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:10:20,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:10:20,699 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:20,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:10:20,760 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:20,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248222263] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:10:20,760 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:10:20,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 8 [2021-11-23 02:10:20,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715406809] [2021-11-23 02:10:20,765 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:10:20,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:10:20,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:10:20,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:10:20,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:10:20,767 INFO L87 Difference]: Start difference. First operand 544 states and 793 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:10:20,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:10:20,884 INFO L93 Difference]: Finished difference Result 630 states and 861 transitions. [2021-11-23 02:10:20,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:10:20,885 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-23 02:10:20,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:10:20,889 INFO L225 Difference]: With dead ends: 630 [2021-11-23 02:10:20,890 INFO L226 Difference]: Without dead ends: 630 [2021-11-23 02:10:20,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:10:20,891 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 182 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:10:20,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 374 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:10:20,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-11-23 02:10:20,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 460. [2021-11-23 02:10:20,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 401 states have (on average 1.3865336658354115) internal successors, (556), 431 states have internal predecessors, (556), 16 states have call successors, (16), 12 states have call predecessors, (16), 25 states have return successors, (60), 16 states have call predecessors, (60), 16 states have call successors, (60) [2021-11-23 02:10:20,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 632 transitions. [2021-11-23 02:10:20,916 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 632 transitions. Word has length 22 [2021-11-23 02:10:20,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:10:20,917 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 632 transitions. [2021-11-23 02:10:20,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:10:20,918 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 632 transitions. [2021-11-23 02:10:20,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 02:10:20,923 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:20,923 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] [2021-11-23 02:10:20,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-23 02:10:21,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-11-23 02:10:21,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-23 02:10:21,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:10:21,538 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)] === [2021-11-23 02:10:21,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:21,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1243788554, now seen corresponding path program 1 times [2021-11-23 02:10:21,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:10:21,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [115349567] [2021-11-23 02:10:21,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:21,539 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:10:21,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:10:21,540 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:10:21,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 02:10:21,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:21,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:10:21,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:10:21,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:21,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:10:21,709 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:21,709 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:10:21,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [115349567] [2021-11-23 02:10:21,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [115349567] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:10:21,710 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:10:21,710 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-23 02:10:21,710 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969519185] [2021-11-23 02:10:21,710 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:10:21,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:10:21,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:10:21,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:10:21,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:10:21,712 INFO L87 Difference]: Start difference. First operand 460 states and 632 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:10:21,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:10:21,718 INFO L93 Difference]: Finished difference Result 333 states and 440 transitions. [2021-11-23 02:10:21,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:10:21,719 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 [2021-11-23 02:10:21,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:10:21,721 INFO L225 Difference]: With dead ends: 333 [2021-11-23 02:10:21,721 INFO L226 Difference]: Without dead ends: 333 [2021-11-23 02:10:21,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:10:21,722 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 7 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:10:21,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 127 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:10:21,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2021-11-23 02:10:21,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 332. [2021-11-23 02:10:21,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 286 states have (on average 1.367132867132867) internal successors, (391), 312 states have internal predecessors, (391), 11 states have call successors, (11), 8 states have call predecessors, (11), 17 states have return successors, (37), 11 states have call predecessors, (37), 11 states have call successors, (37) [2021-11-23 02:10:21,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 439 transitions. [2021-11-23 02:10:21,734 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 439 transitions. Word has length 25 [2021-11-23 02:10:21,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:10:21,734 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 439 transitions. [2021-11-23 02:10:21,735 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) [2021-11-23 02:10:21,735 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 439 transitions. [2021-11-23 02:10:21,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 02:10:21,736 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:21,736 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] [2021-11-23 02:10:21,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-23 02:10:21,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:10:21,947 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:10:21,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:21,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1125506638, now seen corresponding path program 1 times [2021-11-23 02:10:21,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:10:21,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2134223177] [2021-11-23 02:10:21,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:21,948 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:10:21,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:10:21,949 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:10:21,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-11-23 02:10:22,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:22,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 02:10:22,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:10:22,461 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:10:22,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-11-23 02:10:22,469 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:10:22,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-11-23 02:10:22,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:22,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:10:35,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:35,891 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:10:35,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2134223177] [2021-11-23 02:10:35,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2134223177] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:10:35,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [521951285] [2021-11-23 02:10:35,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:35,892 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:10:35,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:10:35,897 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:10:35,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-11-23 02:10:36,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:36,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 02:10:36,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:10:36,518 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:10:36,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-11-23 02:10:36,529 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:10:36,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-11-23 02:10:36,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:36,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:10:43,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:43,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [521951285] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:10:43,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700701354] [2021-11-23 02:10:43,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:43,559 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:10:43,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:10:43,560 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:10:43,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-23 02:10:43,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:43,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 02:10:43,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:10:44,007 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:10:44,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-11-23 02:10:44,014 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:10:44,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-11-23 02:10:44,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:44,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:10:52,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:52,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700701354] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:10:52,403 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:10:52,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 10 [2021-11-23 02:10:52,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690715820] [2021-11-23 02:10:52,403 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:10:52,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 02:10:52,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:10:52,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 02:10:52,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=93, Unknown=4, NotChecked=0, Total=132 [2021-11-23 02:10:52,405 INFO L87 Difference]: Start difference. First operand 332 states and 439 transitions. Second operand has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 9 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:10:53,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:10:53,172 INFO L93 Difference]: Finished difference Result 339 states and 446 transitions. [2021-11-23 02:10:53,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:10:53,172 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 9 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 27 [2021-11-23 02:10:53,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:10:53,175 INFO L225 Difference]: With dead ends: 339 [2021-11-23 02:10:53,175 INFO L226 Difference]: Without dead ends: 339 [2021-11-23 02:10:53,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 141 SyntacticMatches, 6 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=42, Invalid=110, Unknown=4, NotChecked=0, Total=156 [2021-11-23 02:10:53,176 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 103 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:10:53,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 308 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 74 Invalid, 0 Unknown, 173 Unchecked, 0.6s Time] [2021-11-23 02:10:53,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2021-11-23 02:10:53,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 335. [2021-11-23 02:10:53,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 289 states have (on average 1.3633217993079585) internal successors, (394), 314 states have internal predecessors, (394), 11 states have call successors, (11), 9 states have call predecessors, (11), 17 states have return successors, (37), 11 states have call predecessors, (37), 11 states have call successors, (37) [2021-11-23 02:10:53,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 442 transitions. [2021-11-23 02:10:53,189 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 442 transitions. Word has length 27 [2021-11-23 02:10:53,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:10:53,191 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 442 transitions. [2021-11-23 02:10:53,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.363636363636363) internal successors, (48), 9 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:10:53,192 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 442 transitions. [2021-11-23 02:10:53,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 02:10:53,195 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:53,195 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:10:53,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-11-23 02:10:53,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-23 02:10:53,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (22)] Forceful destruction successful, exit code 0 [2021-11-23 02:10:53,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:10:53,799 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:10:53,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:53,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1031478775, now seen corresponding path program 1 times [2021-11-23 02:10:53,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:10:53,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [796218513] [2021-11-23 02:10:53,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:53,800 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:10:53,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:10:53,801 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:10:53,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-23 02:10:53,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:53,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:10:53,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:10:54,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:54,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:10:54,565 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:54,565 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:10:54,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [796218513] [2021-11-23 02:10:54,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [796218513] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:10:54,565 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:10:54,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 7] imperfect sequences [] total 11 [2021-11-23 02:10:54,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140831297] [2021-11-23 02:10:54,566 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:10:54,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 02:10:54,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:10:54,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 02:10:54,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:10:54,568 INFO L87 Difference]: Start difference. First operand 335 states and 442 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:10:54,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:10:54,946 INFO L93 Difference]: Finished difference Result 382 states and 490 transitions. [2021-11-23 02:10:54,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:10:54,947 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2021-11-23 02:10:54,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:10:54,949 INFO L225 Difference]: With dead ends: 382 [2021-11-23 02:10:54,949 INFO L226 Difference]: Without dead ends: 382 [2021-11-23 02:10:54,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-11-23 02:10:54,950 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 140 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:10:54,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 285 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:10:54,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-11-23 02:10:54,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 336. [2021-11-23 02:10:54,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 291 states have (on average 1.3608247422680413) internal successors, (396), 315 states have internal predecessors, (396), 11 states have call successors, (11), 9 states have call predecessors, (11), 16 states have return successors, (32), 11 states have call predecessors, (32), 11 states have call successors, (32) [2021-11-23 02:10:54,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 439 transitions. [2021-11-23 02:10:54,963 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 439 transitions. Word has length 28 [2021-11-23 02:10:54,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:10:54,963 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 439 transitions. [2021-11-23 02:10:54,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:10:54,964 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 439 transitions. [2021-11-23 02:10:54,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-23 02:10:54,965 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:54,965 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:10:54,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-23 02:10:55,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:10:55,177 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:10:55,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:55,178 INFO L85 PathProgramCache]: Analyzing trace with hash -253201523, now seen corresponding path program 1 times [2021-11-23 02:10:55,179 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:10:55,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [641724926] [2021-11-23 02:10:55,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:55,179 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:10:55,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:10:55,180 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:10:55,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-23 02:10:55,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:55,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 02:10:55,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:10:55,455 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:10:55,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:10:55,731 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:10:55,731 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:10:55,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [641724926] [2021-11-23 02:10:55,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [641724926] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:10:55,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [582650801] [2021-11-23 02:10:55,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:55,731 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:10:55,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:10:55,733 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:10:55,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-23 02:10:55,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:55,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:10:55,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:10:56,082 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:10:56,082 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:10:56,270 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:10:56,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [582650801] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:10:56,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876105549] [2021-11-23 02:10:56,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:56,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:10:56,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:10:56,271 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:10:56,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-23 02:10:56,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:56,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 02:10:56,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:10:56,463 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:10:56,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:10:56,684 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:10:56,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876105549] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:10:56,685 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:10:56,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 10 [2021-11-23 02:10:56,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583990633] [2021-11-23 02:10:56,685 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:10:56,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 02:10:56,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:10:56,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 02:10:56,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-23 02:10:56,687 INFO L87 Difference]: Start difference. First operand 336 states and 439 transitions. Second operand has 12 states, 11 states have (on average 4.0) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:10:57,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:10:57,401 INFO L93 Difference]: Finished difference Result 452 states and 557 transitions. [2021-11-23 02:10:57,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-23 02:10:57,402 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.0) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-11-23 02:10:57,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:10:57,404 INFO L225 Difference]: With dead ends: 452 [2021-11-23 02:10:57,405 INFO L226 Difference]: Without dead ends: 452 [2021-11-23 02:10:57,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 158 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2021-11-23 02:10:57,406 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 418 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:10:57,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 372 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:10:57,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-11-23 02:10:57,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 405. [2021-11-23 02:10:57,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 357 states have (on average 1.3361344537815125) internal successors, (477), 383 states have internal predecessors, (477), 11 states have call successors, (11), 10 states have call predecessors, (11), 19 states have return successors, (31), 11 states have call predecessors, (31), 11 states have call successors, (31) [2021-11-23 02:10:57,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 519 transitions. [2021-11-23 02:10:57,420 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 519 transitions. Word has length 30 [2021-11-23 02:10:57,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:10:57,420 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 519 transitions. [2021-11-23 02:10:57,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.0) internal successors, (44), 8 states have internal predecessors, (44), 2 states have call successors, (6), 5 states have call predecessors, (6), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 02:10:57,421 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 519 transitions. [2021-11-23 02:10:57,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-23 02:10:57,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:57,421 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:10:57,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-23 02:10:57,630 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-23 02:10:57,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-23 02:10:58,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:10:58,024 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)] === [2021-11-23 02:10:58,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:58,024 INFO L85 PathProgramCache]: Analyzing trace with hash 740687428, now seen corresponding path program 1 times [2021-11-23 02:10:58,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:10:58,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1878275647] [2021-11-23 02:10:58,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:58,025 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:10:58,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:10:58,026 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:10:58,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-23 02:10:58,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:58,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 02:10:58,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:10:58,297 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:10:58,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:10:58,542 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:10:58,542 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:10:58,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1878275647] [2021-11-23 02:10:58,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1878275647] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:10:58,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [43837133] [2021-11-23 02:10:58,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:58,543 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:10:58,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:10:58,544 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:10:58,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-23 02:10:58,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:58,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 02:10:58,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:10:58,844 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:10:58,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:10:59,022 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:10:59,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [43837133] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:10:59,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088262650] [2021-11-23 02:10:59,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:59,022 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:10:59,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:10:59,023 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:10:59,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-23 02:10:59,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:59,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 02:10:59,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:10:59,274 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:10:59,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:10:59,472 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:10:59,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088262650] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:10:59,473 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:10:59,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 8 [2021-11-23 02:10:59,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880936001] [2021-11-23 02:10:59,473 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:10:59,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 02:10:59,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:10:59,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 02:10:59,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:10:59,478 INFO L87 Difference]: Start difference. First operand 405 states and 519 transitions. Second operand has 10 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 2 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:11:00,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:00,038 INFO L93 Difference]: Finished difference Result 500 states and 602 transitions. [2021-11-23 02:11:00,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 02:11:00,039 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 [2021-11-23 02:11:00,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:00,042 INFO L225 Difference]: With dead ends: 500 [2021-11-23 02:11:00,042 INFO L226 Difference]: Without dead ends: 500 [2021-11-23 02:11:00,043 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 [2021-11-23 02:11:00,043 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 448 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:00,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [448 Valid, 223 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:11:00,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-11-23 02:11:00,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 464. [2021-11-23 02:11:00,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 414 states have (on average 1.3309178743961352) internal successors, (551), 441 states have internal predecessors, (551), 11 states have call successors, (11), 11 states have call predecessors, (11), 21 states have return successors, (26), 11 states have call predecessors, (26), 11 states have call successors, (26) [2021-11-23 02:11:00,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 588 transitions. [2021-11-23 02:11:00,058 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 588 transitions. Word has length 31 [2021-11-23 02:11:00,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:00,058 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 588 transitions. [2021-11-23 02:11:00,059 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) [2021-11-23 02:11:00,059 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 588 transitions. [2021-11-23 02:11:00,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-23 02:11:00,059 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:00,060 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:11:00,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-23 02:11:00,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-23 02:11:00,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-23 02:11:00,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:11:00,684 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting parse_inputErr7REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:11:00,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:00,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1377524307, now seen corresponding path program 1 times [2021-11-23 02:11:00,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:11:00,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [956040649] [2021-11-23 02:11:00,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:00,685 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:11:00,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:11:00,686 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:11:00,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (31)] Waiting until timeout for monitored process [2021-11-23 02:11:00,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:00,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 02:11:00,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:11:01,185 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:11:01,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-11-23 02:11:01,200 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:11:01,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 02:11:01,475 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:11:01,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:11:24,523 WARN L227 SmtUtils]: Spent 6.10s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:11:25,740 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:11:25,740 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:11:25,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [956040649] [2021-11-23 02:11:25,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [956040649] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:11:25,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2084250092] [2021-11-23 02:11:25,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:25,741 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:11:25,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:11:25,741 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:11:25,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (32)] Waiting until timeout for monitored process [2021-11-23 02:11:25,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:25,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 02:11:25,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:11:26,314 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:11:26,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2021-11-23 02:11:26,327 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:11:26,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-11-23 02:11:26,544 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:11:26,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:11:40,008 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:11:40,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2084250092] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:11:40,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788006112] [2021-11-23 02:11:40,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:40,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:11:40,009 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:11:40,010 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:11:40,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-23 02:11:40,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:40,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 02:11:40,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:11:40,524 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:11:40,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 28 [2021-11-23 02:11:40,532 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:11:40,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 21 [2021-11-23 02:11:40,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:11:40,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:11:53,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:11:53,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788006112] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:11:53,525 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:11:53,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 10 [2021-11-23 02:11:53,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454870526] [2021-11-23 02:11:53,526 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:11:53,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 02:11:53,527 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:11:53,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 02:11:53,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=92, Unknown=5, NotChecked=0, Total=132 [2021-11-23 02:11:53,528 INFO L87 Difference]: Start difference. First operand 464 states and 588 transitions. Second operand has 12 states, 11 states have (on average 5.454545454545454) internal successors, (60), 9 states have internal predecessors, (60), 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) [2021-11-23 02:11:54,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:54,098 INFO L93 Difference]: Finished difference Result 509 states and 638 transitions. [2021-11-23 02:11:54,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:11:54,101 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 5.454545454545454) internal successors, (60), 9 states have internal predecessors, (60), 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 33 [2021-11-23 02:11:54,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:54,103 INFO L225 Difference]: With dead ends: 509 [2021-11-23 02:11:54,103 INFO L226 Difference]: Without dead ends: 509 [2021-11-23 02:11:54,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 177 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 43.7s TimeCoverageRelationStatistics Valid=59, Invalid=146, Unknown=5, NotChecked=0, Total=210 [2021-11-23 02:11:54,104 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 86 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:54,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 223 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 151 Unchecked, 0.3s Time] [2021-11-23 02:11:54,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-11-23 02:11:54,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 481. [2021-11-23 02:11:54,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 429 states have (on average 1.3216783216783217) internal successors, (567), 456 states have internal predecessors, (567), 12 states have call successors, (12), 12 states have call predecessors, (12), 22 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) [2021-11-23 02:11:54,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 609 transitions. [2021-11-23 02:11:54,119 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 609 transitions. Word has length 33 [2021-11-23 02:11:54,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:54,121 INFO L470 AbstractCegarLoop]: Abstraction has 481 states and 609 transitions. [2021-11-23 02:11:54,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 5.454545454545454) internal successors, (60), 9 states have internal predecessors, (60), 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) [2021-11-23 02:11:54,121 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 609 transitions. [2021-11-23 02:11:54,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-23 02:11:54,122 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:54,122 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] [2021-11-23 02:11:54,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (31)] Forceful destruction successful, exit code 0 [2021-11-23 02:11:54,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-23 02:11:54,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (32)] Forceful destruction successful, exit code 0 [2021-11-23 02:11:54,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:11:54,734 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:11:54,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:54,734 INFO L85 PathProgramCache]: Analyzing trace with hash 952776277, now seen corresponding path program 1 times [2021-11-23 02:11:54,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:11:54,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2143748396] [2021-11-23 02:11:54,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:54,735 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:11:54,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:11:54,736 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:11:54,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (34)] Waiting until timeout for monitored process [2021-11-23 02:11:54,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:54,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 02:11:54,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:11:55,280 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:11:55,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-23 02:11:55,286 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:11:55,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-11-23 02:11:55,582 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:11:55,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:12:11,257 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:12:11,257 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:12:11,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2143748396] [2021-11-23 02:12:11,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2143748396] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:12:11,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1856144469] [2021-11-23 02:12:11,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:11,258 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:12:11,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:12:11,259 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:12:11,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (35)] Waiting until timeout for monitored process [2021-11-23 02:12:11,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:11,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 02:12:11,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:12:11,787 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:12:11,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-11-23 02:12:11,793 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:12:11,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-11-23 02:12:11,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:12:11,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:12:22,909 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:12:22,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1856144469] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:12:22,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941683264] [2021-11-23 02:12:22,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:22,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:12:22,910 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:12:22,911 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:12:22,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-23 02:12:22,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:22,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 02:12:22,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:12:23,313 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:12:23,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-11-23 02:12:23,320 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:12:23,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-11-23 02:12:23,514 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:12:23,514 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:12:35,977 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:12:35,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1941683264] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:12:35,977 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:12:35,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 12 [2021-11-23 02:12:35,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046267944] [2021-11-23 02:12:35,978 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:12:35,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 02:12:35,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:12:35,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 02:12:35,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=134, Unknown=4, NotChecked=0, Total=182 [2021-11-23 02:12:35,979 INFO L87 Difference]: Start difference. First operand 481 states and 609 transitions. Second operand has 14 states, 13 states have (on average 4.923076923076923) internal successors, (64), 11 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:12:36,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:12:36,120 INFO L93 Difference]: Finished difference Result 484 states and 612 transitions. [2021-11-23 02:12:36,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:12:36,121 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.923076923076923) internal successors, (64), 11 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2021-11-23 02:12:36,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:12:36,123 INFO L225 Difference]: With dead ends: 484 [2021-11-23 02:12:36,123 INFO L226 Difference]: Without dead ends: 484 [2021-11-23 02:12:36,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 186 SyntacticMatches, 6 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 33.0s TimeCoverageRelationStatistics Valid=44, Invalid=134, Unknown=4, NotChecked=0, Total=182 [2021-11-23 02:12:36,125 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 21 mSDsluCounter, 404 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:12:36,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 464 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 174 Unchecked, 0.1s Time] [2021-11-23 02:12:36,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-11-23 02:12:36,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 484. [2021-11-23 02:12:36,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 432 states have (on average 1.3194444444444444) internal successors, (570), 459 states have internal predecessors, (570), 12 states have call successors, (12), 12 states have call predecessors, (12), 22 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) [2021-11-23 02:12:36,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 612 transitions. [2021-11-23 02:12:36,139 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 612 transitions. Word has length 35 [2021-11-23 02:12:36,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:12:36,139 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 612 transitions. [2021-11-23 02:12:36,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.923076923076923) internal successors, (64), 11 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:12:36,140 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 612 transitions. [2021-11-23 02:12:36,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-23 02:12:36,140 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:12:36,140 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:12:36,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (35)] Forceful destruction successful, exit code 0 [2021-11-23 02:12:36,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-23 02:12:36,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (34)] Forceful destruction successful, exit code 0 [2021-11-23 02:12:36,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:12:36,760 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr9REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:12:36,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:12:36,760 INFO L85 PathProgramCache]: Analyzing trace with hash 950930836, now seen corresponding path program 1 times [2021-11-23 02:12:36,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:12:36,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1058970014] [2021-11-23 02:12:36,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:36,761 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:12:36,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:12:36,761 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:12:36,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-23 02:12:36,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:36,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:12:36,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:12:37,011 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:12:37,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:12:37,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 32 [2021-11-23 02:12:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:12:38,103 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:12:38,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1058970014] [2021-11-23 02:12:38,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1058970014] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:12:38,104 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:12:38,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [] total 7 [2021-11-23 02:12:38,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337483586] [2021-11-23 02:12:38,105 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:12:38,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:12:38,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:12:38,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:12:38,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:12:38,106 INFO L87 Difference]: Start difference. First operand 484 states and 612 transitions. Second operand has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 8 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:12:38,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:12:38,901 INFO L93 Difference]: Finished difference Result 567 states and 693 transitions. [2021-11-23 02:12:38,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:12:38,903 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 8 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 35 [2021-11-23 02:12:38,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:12:38,906 INFO L225 Difference]: With dead ends: 567 [2021-11-23 02:12:38,906 INFO L226 Difference]: Without dead ends: 567 [2021-11-23 02:12:38,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:12:38,907 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 193 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:12:38,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 175 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 02:12:38,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2021-11-23 02:12:38,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 483. [2021-11-23 02:12:38,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 432 states have (on average 1.3009259259259258) internal successors, (562), 458 states have internal predecessors, (562), 12 states have call successors, (12), 12 states have call predecessors, (12), 22 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) [2021-11-23 02:12:38,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 604 transitions. [2021-11-23 02:12:38,923 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 604 transitions. Word has length 35 [2021-11-23 02:12:38,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:12:38,923 INFO L470 AbstractCegarLoop]: Abstraction has 483 states and 604 transitions. [2021-11-23 02:12:38,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 9.142857142857142) internal successors, (64), 8 states have internal predecessors, (64), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 02:12:38,924 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 604 transitions. [2021-11-23 02:12:38,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-23 02:12:38,924 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:12:38,925 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:12:38,945 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-23 02:12:39,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:12:39,136 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr0REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:12:39,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:12:39,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1567291088, now seen corresponding path program 1 times [2021-11-23 02:12:39,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:12:39,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [218854474] [2021-11-23 02:12:39,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:39,137 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:12:39,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:12:39,138 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:12:39,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (38)] Waiting until timeout for monitored process [2021-11-23 02:12:39,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:39,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:12:39,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:12:39,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-23 02:12:39,947 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:12:39,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:12:40,702 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:12:40,702 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:12:40,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [218854474] [2021-11-23 02:12:40,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [218854474] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:12:40,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2069214660] [2021-11-23 02:12:40,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:40,703 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:12:40,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:12:40,705 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:12:40,706 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (39)] Waiting until timeout for monitored process [2021-11-23 02:12:40,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:40,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:12:40,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:12:41,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 29 [2021-11-23 02:12:41,492 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 02:12:41,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:12:41,990 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 02:12:41,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2069214660] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:12:41,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453065874] [2021-11-23 02:12:41,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:41,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:12:41,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:12:41,991 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:12:41,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-23 02:12:42,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:42,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 02:12:42,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:12:43,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2021-11-23 02:12:43,713 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:12:43,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:12:47,122 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:12:47,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453065874] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:12:47,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:12:47,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 4, 4, 9, 9] total 37 [2021-11-23 02:12:47,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093737730] [2021-11-23 02:12:47,123 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:12:47,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-23 02:12:47,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:12:47,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-23 02:12:47,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1198, Unknown=0, NotChecked=0, Total=1406 [2021-11-23 02:12:47,125 INFO L87 Difference]: Start difference. First operand 483 states and 604 transitions. Second operand has 38 states, 38 states have (on average 4.657894736842105) internal successors, (177), 33 states have internal predecessors, (177), 9 states have call successors, (9), 9 states have call predecessors, (9), 6 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 02:12:59,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:12:59,308 INFO L93 Difference]: Finished difference Result 386 states and 449 transitions. [2021-11-23 02:12:59,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-23 02:12:59,310 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 4.657894736842105) internal successors, (177), 33 states have internal predecessors, (177), 9 states have call successors, (9), 9 states have call predecessors, (9), 6 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) Word has length 36 [2021-11-23 02:12:59,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:12:59,312 INFO L225 Difference]: With dead ends: 386 [2021-11-23 02:12:59,313 INFO L226 Difference]: Without dead ends: 386 [2021-11-23 02:12:59,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1408 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=921, Invalid=4049, Unknown=0, NotChecked=0, Total=4970 [2021-11-23 02:12:59,316 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 1088 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 1023 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1088 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 1247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 1023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:12:59,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1088 Valid, 437 Invalid, 1247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 1023 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-11-23 02:12:59,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-11-23 02:12:59,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 319. [2021-11-23 02:12:59,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 282 states have (on average 1.322695035460993) internal successors, (373), 304 states have internal predecessors, (373), 7 states have call successors, (7), 7 states have call predecessors, (7), 13 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2021-11-23 02:12:59,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 395 transitions. [2021-11-23 02:12:59,326 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 395 transitions. Word has length 36 [2021-11-23 02:12:59,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:12:59,326 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 395 transitions. [2021-11-23 02:12:59,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 4.657894736842105) internal successors, (177), 33 states have internal predecessors, (177), 9 states have call successors, (9), 9 states have call predecessors, (9), 6 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2021-11-23 02:12:59,327 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 395 transitions. [2021-11-23 02:12:59,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-23 02:12:59,327 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:12:59,328 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:12:59,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-23 02:12:59,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (38)] Forceful destruction successful, exit code 0 [2021-11-23 02:12:59,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (39)] Forceful destruction successful, exit code 0 [2021-11-23 02:12:59,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:12:59,950 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)] === [2021-11-23 02:12:59,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:12:59,950 INFO L85 PathProgramCache]: Analyzing trace with hash -981900328, now seen corresponding path program 1 times [2021-11-23 02:12:59,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:12:59,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1348588591] [2021-11-23 02:12:59,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:59,951 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:12:59,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:12:59,952 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:12:59,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (41)] Waiting until timeout for monitored process [2021-11-23 02:13:00,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:13:00,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:13:00,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:13:00,481 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 [2021-11-23 02:13:00,542 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:13:00,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:13:00,873 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 [2021-11-23 02:13:01,399 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:13:01,399 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 27 treesize of output 27 [2021-11-23 02:13:02,418 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:13:02,418 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:13:02,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1348588591] [2021-11-23 02:13:02,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1348588591] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:13:02,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1820090268] [2021-11-23 02:13:02,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:13:02,419 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:13:02,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:13:02,420 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:13:02,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (42)] Waiting until timeout for monitored process [2021-11-23 02:13:02,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:13:02,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:13:02,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:13:03,100 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 [2021-11-23 02:13:03,162 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:13:03,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:13:03,457 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:13:03,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1820090268] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:13:03,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:13:03,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10, 10, 5] total 26 [2021-11-23 02:13:03,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056303068] [2021-11-23 02:13:03,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:13:03,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:13:03,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:13:03,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:13:03,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2021-11-23 02:13:03,459 INFO L87 Difference]: Start difference. First operand 319 states and 395 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:13:03,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:13:03,981 INFO L93 Difference]: Finished difference Result 397 states and 475 transitions. [2021-11-23 02:13:03,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:13:03,983 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 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 37 [2021-11-23 02:13:03,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:13:03,985 INFO L225 Difference]: With dead ends: 397 [2021-11-23 02:13:03,985 INFO L226 Difference]: Without dead ends: 397 [2021-11-23 02:13:03,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=165, Invalid=647, Unknown=0, NotChecked=0, Total=812 [2021-11-23 02:13:03,986 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 282 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:13:03,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 182 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:13:03,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-11-23 02:13:03,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 352. [2021-11-23 02:13:03,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 312 states have (on average 1.314102564102564) internal successors, (410), 335 states have internal predecessors, (410), 8 states have call successors, (8), 8 states have call predecessors, (8), 15 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2021-11-23 02:13:03,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 437 transitions. [2021-11-23 02:13:03,998 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 437 transitions. Word has length 37 [2021-11-23 02:13:03,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:13:03,998 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 437 transitions. [2021-11-23 02:13:03,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:13:03,999 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 437 transitions. [2021-11-23 02:13:03,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-23 02:13:03,999 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:13:03,999 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:13:04,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (41)] Forceful destruction successful, exit code 0 [2021-11-23 02:13:04,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (42)] Forceful destruction successful, exit code 0 [2021-11-23 02:13:04,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:13:04,411 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting parse_inputErr7REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:13:04,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:13:04,411 INFO L85 PathProgramCache]: Analyzing trace with hash -948350694, now seen corresponding path program 1 times [2021-11-23 02:13:04,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:13:04,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [639899817] [2021-11-23 02:13:04,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:13:04,411 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:13:04,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:13:04,413 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:13:04,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (43)] Waiting until timeout for monitored process [2021-11-23 02:13:04,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:13:04,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 02:13:04,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:13:04,920 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:13:04,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-11-23 02:13:04,926 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:13:04,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-11-23 02:13:05,348 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:13:05,348 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:13:10,785 WARN L860 $PredicateComparison]: unable to prove that (or (let ((.cse0 (bvadd (_ bv18 32) |c_~#commands~0.offset|))) (and (bvule .cse0 (select |c_#length| |c_~#commands~0.base|)) (bvule (bvadd (_ bv17 32) |c_~#commands~0.offset|) .cse0))) (exists ((|v_parse_input_c1_~x~0#1.base_58| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_parse_input_c1_~x~0#1.base_58|)))) (let ((.cse1 (bvadd (_ bv18 32) |c_~#commands~0.offset|))) (or (not (bvule (bvadd (_ bv17 32) |c_~#commands~0.offset|) .cse1)) (not (bvule .cse1 (select (store |c_old(#length)| |v_parse_input_c1_~x~0#1.base_58| (_ bv1 32)) |c_~#commands~0.base|)))))))) is different from true [2021-11-23 02:13:17,942 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:13:17,942 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:13:17,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [639899817] [2021-11-23 02:13:17,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [639899817] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:13:17,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [119697094] [2021-11-23 02:13:17,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:13:17,942 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:13:17,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:13:17,943 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:13:17,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (44)] Waiting until timeout for monitored process [2021-11-23 02:13:18,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:13:18,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 02:13:18,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:13:18,525 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:13:18,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-11-23 02:13:18,532 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:13:18,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-11-23 02:13:18,860 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:13:18,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:13:40,034 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:13:40,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [119697094] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:13:40,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787137698] [2021-11-23 02:13:40,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:13:40,035 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:13:40,035 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:13:40,035 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:13:40,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-23 02:13:40,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:13:40,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 02:13:40,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:13:40,464 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:13:40,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-11-23 02:13:40,470 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:13:40,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-11-23 02:13:40,870 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:13:40,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:13:49,887 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:13:49,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787137698] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:13:49,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:13:49,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 14 [2021-11-23 02:13:49,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532664782] [2021-11-23 02:13:49,888 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:13:49,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 02:13:49,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:13:49,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 02:13:49,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=151, Unknown=10, NotChecked=26, Total=240 [2021-11-23 02:13:49,890 INFO L87 Difference]: Start difference. First operand 352 states and 437 transitions. Second operand has 16 states, 15 states have (on average 6.4) internal successors, (96), 13 states have internal predecessors, (96), 4 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) [2021-11-23 02:13:50,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:13:50,977 INFO L93 Difference]: Finished difference Result 377 states and 452 transitions. [2021-11-23 02:13:50,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 02:13:50,979 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 6.4) internal successors, (96), 13 states have internal predecessors, (96), 4 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 41 [2021-11-23 02:13:50,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:13:50,982 INFO L225 Difference]: With dead ends: 377 [2021-11-23 02:13:50,983 INFO L226 Difference]: Without dead ends: 377 [2021-11-23 02:13:50,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 223 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 1 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 36.5s TimeCoverageRelationStatistics Valid=80, Invalid=220, Unknown=10, NotChecked=32, Total=342 [2021-11-23 02:13:50,989 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 136 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 332 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:13:50,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 351 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 72 Invalid, 0 Unknown, 332 Unchecked, 0.5s Time] [2021-11-23 02:13:50,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-11-23 02:13:50,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 355. [2021-11-23 02:13:51,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 314 states have (on average 1.3089171974522293) internal successors, (411), 338 states have internal predecessors, (411), 8 states have call successors, (8), 8 states have call predecessors, (8), 16 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2021-11-23 02:13:51,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 439 transitions. [2021-11-23 02:13:51,003 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 439 transitions. Word has length 41 [2021-11-23 02:13:51,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:13:51,004 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 439 transitions. [2021-11-23 02:13:51,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 6.4) internal successors, (96), 13 states have internal predecessors, (96), 4 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) [2021-11-23 02:13:51,004 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 439 transitions. [2021-11-23 02:13:51,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-23 02:13:51,005 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:13:51,006 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] [2021-11-23 02:13:51,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (43)] Forceful destruction successful, exit code 0 [2021-11-23 02:13:51,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (44)] Forceful destruction successful, exit code 0 [2021-11-23 02:13:51,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-23 02:13:51,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:13:51,618 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)] === [2021-11-23 02:13:51,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:13:51,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1419217069, now seen corresponding path program 1 times [2021-11-23 02:13:51,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:13:51,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1769704593] [2021-11-23 02:13:51,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:13:51,619 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:13:51,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:13:51,619 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:13:51,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (46)] Waiting until timeout for monitored process [2021-11-23 02:13:51,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:13:51,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 02:13:51,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:13:52,522 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:13:52,522 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 37 treesize of output 39 [2021-11-23 02:13:52,538 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-23 02:13:52,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 34 [2021-11-23 02:13:52,707 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 02:13:52,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:14:12,415 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 11 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 02:14:12,416 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:14:12,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1769704593] [2021-11-23 02:14:12,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1769704593] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:14:12,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [696753683] [2021-11-23 02:14:12,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:12,416 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:14:12,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:14:12,417 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:14:12,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (47)] Waiting until timeout for monitored process [2021-11-23 02:14:12,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:12,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 02:14:12,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:14:13,368 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:14:13,368 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-11-23 02:14:13,373 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:14:13,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-11-23 02:14:13,548 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 02:14:13,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:14:25,128 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 02:14:25,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [696753683] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:14:25,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834829272] [2021-11-23 02:14:25,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:25,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:14:25,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:14:25,129 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:14:25,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-23 02:14:25,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:25,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 02:14:25,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:14:25,906 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:14:25,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-11-23 02:14:25,914 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:14:25,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-11-23 02:14:25,998 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 02:14:25,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:14:39,994 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 02:14:39,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834829272] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:14:39,994 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:14:39,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 5, 5, 5, 5] total 14 [2021-11-23 02:14:39,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122870679] [2021-11-23 02:14:39,995 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:14:39,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 02:14:39,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:14:39,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 02:14:39,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=173, Unknown=4, NotChecked=0, Total=240 [2021-11-23 02:14:39,996 INFO L87 Difference]: Start difference. First operand 355 states and 439 transitions. Second operand has 16 states, 15 states have (on average 4.933333333333334) internal successors, (74), 12 states have internal predecessors, (74), 6 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-23 02:14:40,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:14:40,729 INFO L93 Difference]: Finished difference Result 369 states and 449 transitions. [2021-11-23 02:14:40,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 02:14:40,729 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 4.933333333333334) internal successors, (74), 12 states have internal predecessors, (74), 6 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) Word has length 48 [2021-11-23 02:14:40,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:14:40,731 INFO L225 Difference]: With dead ends: 369 [2021-11-23 02:14:40,731 INFO L226 Difference]: Without dead ends: 369 [2021-11-23 02:14:40,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 259 SyntacticMatches, 10 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 35.8s TimeCoverageRelationStatistics Valid=106, Invalid=270, Unknown=4, NotChecked=0, Total=380 [2021-11-23 02:14:40,732 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 104 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 272 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:14:40,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 371 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 99 Invalid, 0 Unknown, 272 Unchecked, 0.4s Time] [2021-11-23 02:14:40,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2021-11-23 02:14:40,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 359. [2021-11-23 02:14:40,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 317 states have (on average 1.3028391167192428) internal successors, (413), 340 states have internal predecessors, (413), 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) [2021-11-23 02:14:40,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 445 transitions. [2021-11-23 02:14:40,742 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 445 transitions. Word has length 48 [2021-11-23 02:14:40,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:14:40,743 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 445 transitions. [2021-11-23 02:14:40,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 4.933333333333334) internal successors, (74), 12 states have internal predecessors, (74), 6 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (6), 6 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-23 02:14:40,743 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 445 transitions. [2021-11-23 02:14:40,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-23 02:14:40,744 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:40,744 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] [2021-11-23 02:14:40,755 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (47)] Forceful destruction successful, exit code 0 [2021-11-23 02:14:40,954 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (46)] Forceful destruction successful, exit code 0 [2021-11-23 02:14:41,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-23 02:14:41,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:14:41,347 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:14:41,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:41,347 INFO L85 PathProgramCache]: Analyzing trace with hash -455995401, now seen corresponding path program 2 times [2021-11-23 02:14:41,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:14:41,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [737572055] [2021-11-23 02:14:41,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:14:41,347 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:14:41,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:14:41,348 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:14:41,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (49)] Waiting until timeout for monitored process [2021-11-23 02:14:41,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:14:41,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:14:41,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 02:14:41,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:14:41,880 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:14:41,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:14:42,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-23 02:14:42,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-23 02:14:43,165 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:14:43,165 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:14:43,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [737572055] [2021-11-23 02:14:43,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [737572055] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:14:43,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [422887560] [2021-11-23 02:14:43,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:14:43,166 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:14:43,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:14:43,179 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:14:43,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (50)] Waiting until timeout for monitored process [2021-11-23 02:14:43,380 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 02:14:43,381 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050959261] [2021-11-23 02:14:43,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 02:14:43,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:14:43,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:14:43,385 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:14:43,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (50)] Forceful destruction successful, exit code 1 [2021-11-23 02:14:43,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-23 02:14:43,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 02:14:43,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:14:43,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 02:14:43,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:14:43,770 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:14:43,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:14:43,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-11-23 02:14:44,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-23 02:14:44,719 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:14:44,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050959261] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:14:44,719 INFO L186 FreeRefinementEngine]: Found 0 perfect and 4 imperfect interpolant sequences. [2021-11-23 02:14:44,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 5, 7] total 12 [2021-11-23 02:14:44,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167191726] [2021-11-23 02:14:44,720 INFO L85 oduleStraightlineAll]: Using 4 imperfect interpolants to construct interpolant automaton [2021-11-23 02:14:44,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-23 02:14:44,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:14:44,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-23 02:14:44,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-11-23 02:14:44,721 INFO L87 Difference]: Start difference. First operand 359 states and 445 transitions. Second operand has 13 states, 12 states have (on average 7.166666666666667) internal successors, (86), 12 states have internal predecessors, (86), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 02:14:45,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:14:45,409 INFO L93 Difference]: Finished difference Result 410 states and 493 transitions. [2021-11-23 02:14:45,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 02:14:45,410 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 7.166666666666667) internal successors, (86), 12 states have internal predecessors, (86), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2021-11-23 02:14:45,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:14:45,412 INFO L225 Difference]: With dead ends: 410 [2021-11-23 02:14:45,412 INFO L226 Difference]: Without dead ends: 410 [2021-11-23 02:14:45,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-11-23 02:14:45,412 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 447 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 452 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:14:45,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [452 Valid, 218 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:14:45,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-11-23 02:14:45,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 368. [2021-11-23 02:14:45,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 326 states have (on average 1.2791411042944785) internal successors, (417), 349 states have internal predecessors, (417), 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) [2021-11-23 02:14:45,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 449 transitions. [2021-11-23 02:14:45,423 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 449 transitions. Word has length 48 [2021-11-23 02:14:45,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:14:45,423 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 449 transitions. [2021-11-23 02:14:45,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 7.166666666666667) internal successors, (86), 12 states have internal predecessors, (86), 4 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2021-11-23 02:14:45,424 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 449 transitions. [2021-11-23 02:14:45,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-23 02:14:45,425 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:45,425 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] [2021-11-23 02:14:45,471 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-11-23 02:14:45,648 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (49)] Forceful destruction successful, exit code 0 [2021-11-23 02:14:45,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:14:45,841 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:14:45,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:45,842 INFO L85 PathProgramCache]: Analyzing trace with hash -2005037539, now seen corresponding path program 1 times [2021-11-23 02:14:45,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:14:45,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1018302563] [2021-11-23 02:14:45,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:45,842 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:14:45,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:14:45,843 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:14:45,845 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (52)] Waiting until timeout for monitored process [2021-11-23 02:14:45,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:45,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 02:14:45,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:14:46,045 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 02:14:46,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:14:46,177 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 02:14:46,177 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:14:46,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1018302563] [2021-11-23 02:14:46,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1018302563] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:14:46,177 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:14:46,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-23 02:14:46,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967283143] [2021-11-23 02:14:46,178 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:14:46,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:14:46,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:14:46,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:14:46,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:14:46,179 INFO L87 Difference]: Start difference. First operand 368 states and 449 transitions. Second operand has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:14:46,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:14:46,211 INFO L93 Difference]: Finished difference Result 368 states and 445 transitions. [2021-11-23 02:14:46,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:14:46,212 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-11-23 02:14:46,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:14:46,214 INFO L225 Difference]: With dead ends: 368 [2021-11-23 02:14:46,214 INFO L226 Difference]: Without dead ends: 368 [2021-11-23 02:14:46,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:14:46,214 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 42 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:14:46,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 111 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:14:46,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2021-11-23 02:14:46,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 366. [2021-11-23 02:14:46,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 326 states have (on average 1.2607361963190185) internal successors, (411), 347 states have internal predecessors, (411), 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) [2021-11-23 02:14:46,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 443 transitions. [2021-11-23 02:14:46,224 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 443 transitions. Word has length 47 [2021-11-23 02:14:46,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:14:46,225 INFO L470 AbstractCegarLoop]: Abstraction has 366 states and 443 transitions. [2021-11-23 02:14:46,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 12.666666666666666) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:14:46,225 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 443 transitions. [2021-11-23 02:14:46,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-23 02:14:46,226 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:46,226 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] [2021-11-23 02:14:46,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (52)] Forceful destruction successful, exit code 0 [2021-11-23 02:14:46,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:14:46,437 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:14:46,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:46,437 INFO L85 PathProgramCache]: Analyzing trace with hash -2005037283, now seen corresponding path program 1 times [2021-11-23 02:14:46,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:14:46,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1893280451] [2021-11-23 02:14:46,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:46,438 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:14:46,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:14:46,439 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:14:46,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (53)] Waiting until timeout for monitored process [2021-11-23 02:14:46,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:46,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:14:46,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:14:46,577 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-23 02:14:46,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:14:46,629 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-23 02:14:46,629 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:14:46,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1893280451] [2021-11-23 02:14:46,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1893280451] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:14:46,630 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:14:46,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-23 02:14:46,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943279097] [2021-11-23 02:14:46,630 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:14:46,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:14:46,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:14:46,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:14:46,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:14:46,631 INFO L87 Difference]: Start difference. First operand 366 states and 443 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) [2021-11-23 02:14:46,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:14:46,634 INFO L93 Difference]: Finished difference Result 302 states and 346 transitions. [2021-11-23 02:14:46,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:14:46,634 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 [2021-11-23 02:14:46,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:14:46,635 INFO L225 Difference]: With dead ends: 302 [2021-11-23 02:14:46,636 INFO L226 Difference]: Without dead ends: 302 [2021-11-23 02:14:46,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:14:46,636 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 9 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:14:46,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 95 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 02:14:46,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-11-23 02:14:46,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 293. [2021-11-23 02:14:46,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 263 states have (on average 1.1901140684410647) internal successors, (313), 276 states have internal predecessors, (313), 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) [2021-11-23 02:14:46,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 336 transitions. [2021-11-23 02:14:46,644 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 336 transitions. Word has length 47 [2021-11-23 02:14:46,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:14:46,644 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 336 transitions. [2021-11-23 02:14:46,645 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) [2021-11-23 02:14:46,645 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 336 transitions. [2021-11-23 02:14:46,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-23 02:14:46,645 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:46,646 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, 1] [2021-11-23 02:14:46,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (53)] Forceful destruction successful, exit code 0 [2021-11-23 02:14:46,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:14:46,857 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:14:46,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:46,857 INFO L85 PathProgramCache]: Analyzing trace with hash -2026621493, now seen corresponding path program 1 times [2021-11-23 02:14:46,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:14:46,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1778105230] [2021-11-23 02:14:46,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:46,858 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:14:46,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:14:46,860 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:14:46,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (54)] Waiting until timeout for monitored process [2021-11-23 02:14:46,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:46,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:14:46,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:14:47,308 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 02:14:47,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:14:47,514 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 02:14:47,514 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:14:47,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1778105230] [2021-11-23 02:14:47,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1778105230] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:14:47,514 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:14:47,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-11-23 02:14:47,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135464967] [2021-11-23 02:14:47,515 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:14:47,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:14:47,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:14:47,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:14:47,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:14:47,515 INFO L87 Difference]: Start difference. First operand 293 states and 336 transitions. Second operand has 7 states, 6 states have (on average 13.0) internal successors, (78), 7 states have internal predecessors, (78), 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) [2021-11-23 02:14:47,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:14:47,697 INFO L93 Difference]: Finished difference Result 301 states and 337 transitions. [2021-11-23 02:14:47,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:14:47,701 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.0) internal successors, (78), 7 states have internal predecessors, (78), 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 48 [2021-11-23 02:14:47,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:14:47,703 INFO L225 Difference]: With dead ends: 301 [2021-11-23 02:14:47,703 INFO L226 Difference]: Without dead ends: 301 [2021-11-23 02:14:47,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:14:47,704 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 45 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:14:47,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 191 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:14:47,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-11-23 02:14:47,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 292. [2021-11-23 02:14:47,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 263 states have (on average 1.167300380228137) internal successors, (307), 275 states have internal predecessors, (307), 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) [2021-11-23 02:14:47,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 330 transitions. [2021-11-23 02:14:47,712 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 330 transitions. Word has length 48 [2021-11-23 02:14:47,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:14:47,713 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 330 transitions. [2021-11-23 02:14:47,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 13.0) internal successors, (78), 7 states have internal predecessors, (78), 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) [2021-11-23 02:14:47,713 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 330 transitions. [2021-11-23 02:14:47,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-23 02:14:47,714 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:47,714 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, 1, 1] [2021-11-23 02:14:47,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (54)] Forceful destruction successful, exit code 0 [2021-11-23 02:14:47,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:14:47,925 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting parse_inputErr12ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:14:47,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:47,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1599243231, now seen corresponding path program 1 times [2021-11-23 02:14:47,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:14:47,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [57915305] [2021-11-23 02:14:47,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:47,927 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:14:47,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:14:47,928 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:14:47,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (55)] Waiting until timeout for monitored process [2021-11-23 02:14:48,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:48,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 02:14:48,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:14:48,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-23 02:14:48,218 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 02:14:48,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:14:48,370 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 02:14:48,370 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:14:48,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [57915305] [2021-11-23 02:14:48,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [57915305] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 02:14:48,370 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:14:48,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-23 02:14:48,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327364421] [2021-11-23 02:14:48,371 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 02:14:48,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:14:48,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:14:48,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:14:48,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:14:48,372 INFO L87 Difference]: Start difference. First operand 292 states and 330 transitions. Second operand has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:14:48,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:14:48,540 INFO L93 Difference]: Finished difference Result 306 states and 339 transitions. [2021-11-23 02:14:48,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:14:48,540 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 4 states have internal predecessors, (40), 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 49 [2021-11-23 02:14:48,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:14:48,542 INFO L225 Difference]: With dead ends: 306 [2021-11-23 02:14:48,542 INFO L226 Difference]: Without dead ends: 306 [2021-11-23 02:14:48,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:14:48,543 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 19 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:14:48,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 133 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:14:48,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2021-11-23 02:14:48,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 292. [2021-11-23 02:14:48,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 263 states have (on average 1.155893536121673) internal successors, (304), 275 states have internal predecessors, (304), 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) [2021-11-23 02:14:48,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 327 transitions. [2021-11-23 02:14:48,551 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 327 transitions. Word has length 49 [2021-11-23 02:14:48,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:14:48,552 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 327 transitions. [2021-11-23 02:14:48,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 13.333333333333334) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:14:48,552 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 327 transitions. [2021-11-23 02:14:48,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-23 02:14:48,553 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:48,553 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] [2021-11-23 02:14:48,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (55)] Forceful destruction successful, exit code 0 [2021-11-23 02:14:48,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:14:48,764 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:14:48,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:48,764 INFO L85 PathProgramCache]: Analyzing trace with hash 429224355, now seen corresponding path program 1 times [2021-11-23 02:14:48,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:14:48,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1704558976] [2021-11-23 02:14:48,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:48,765 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:14:48,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:14:48,766 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:14:48,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (56)] Waiting until timeout for monitored process [2021-11-23 02:14:48,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:48,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 02:14:48,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:14:49,511 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:14:49,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-11-23 02:14:49,517 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:14:49,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-11-23 02:14:49,992 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-23 02:14:49,992 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 30 treesize of output 30 [2021-11-23 02:14:50,329 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-23 02:14:50,329 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 29 treesize of output 34 [2021-11-23 02:14:50,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-23 02:14:50,610 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 [2021-11-23 02:14:50,700 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:14:50,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:14:51,007 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-11-23 02:14:51,008 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 42 [2021-11-23 02:14:53,560 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 02:14:53,560 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 38 treesize of output 37 [2021-11-23 02:15:25,306 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 20 refuted. 9 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:15:25,306 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:15:25,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1704558976] [2021-11-23 02:15:25,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1704558976] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:15:25,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [154748028] [2021-11-23 02:15:25,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:15:25,307 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:15:25,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:15:25,310 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:15:25,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (57)] Waiting until timeout for monitored process [2021-11-23 02:15:25,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:15:25,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-23 02:15:25,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:15:26,105 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:15:26,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2021-11-23 02:15:26,113 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:15:26,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 24 [2021-11-23 02:15:26,403 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-23 02:15:26,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 29 [2021-11-23 02:15:30,684 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-23 02:15:30,684 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 25 treesize of output 30 [2021-11-23 02:15:30,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-23 02:15:30,901 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 [2021-11-23 02:15:31,007 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:15:31,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:15:31,165 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-11-23 02:15:31,165 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 41 treesize of output 40 [2021-11-23 02:15:39,830 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 02:15:39,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-23 02:16:17,046 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 18 refuted. 11 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:16:17,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [154748028] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:16:17,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240565118] [2021-11-23 02:16:17,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:17,046 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:16:17,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:16:17,048 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:16:17,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-23 02:16:17,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:17,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 02:16:17,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:16:17,910 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-23 02:16:17,910 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 38 treesize of output 38 [2021-11-23 02:16:17,934 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-23 02:16:17,934 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 25 treesize of output 27 [2021-11-23 02:16:18,423 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 45 treesize of output 33 [2021-11-23 02:16:18,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 22 [2021-11-23 02:16:18,593 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:16:18,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:16:18,792 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 46 treesize of output 34 [2021-11-23 02:16:18,798 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 47 treesize of output 43 [2021-11-23 02:16:18,816 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 02:16:18,816 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 42 [2021-11-23 02:16:23,366 INFO L354 Elim1Store]: treesize reduction 5, result has 58.3 percent of original size [2021-11-23 02:16:23,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 50 [2021-11-23 02:16:23,589 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 02:16:23,590 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 25 treesize of output 24 [2021-11-23 02:16:23,752 INFO L354 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2021-11-23 02:16:23,752 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 [2021-11-23 02:16:23,913 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 25 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 02:16:23,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240565118] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:16:23,913 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:16:23,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 12, 10, 8, 10] total 44 [2021-11-23 02:16:23,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45052553] [2021-11-23 02:16:23,914 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:16:23,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-23 02:16:23,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:16:23,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-23 02:16:23,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1586, Unknown=29, NotChecked=0, Total=1980 [2021-11-23 02:16:23,915 INFO L87 Difference]: Start difference. First operand 292 states and 327 transitions. Second operand has 45 states, 44 states have (on average 4.613636363636363) internal successors, (203), 41 states have internal predecessors, (203), 8 states have call successors, (12), 10 states have call predecessors, (12), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-23 02:16:44,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:44,602 INFO L93 Difference]: Finished difference Result 423 states and 458 transitions. [2021-11-23 02:16:44,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-23 02:16:44,603 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 4.613636363636363) internal successors, (203), 41 states have internal predecessors, (203), 8 states have call successors, (12), 10 states have call predecessors, (12), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 50 [2021-11-23 02:16:44,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:44,606 INFO L225 Difference]: With dead ends: 423 [2021-11-23 02:16:44,606 INFO L226 Difference]: Without dead ends: 423 [2021-11-23 02:16:44,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 259 SyntacticMatches, 24 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2251 ImplicationChecksByTransitivity, 108.4s TimeCoverageRelationStatistics Valid=1158, Invalid=4062, Unknown=36, NotChecked=0, Total=5256 [2021-11-23 02:16:44,609 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 614 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 614 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 1022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 697 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:44,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [614 Valid, 928 Invalid, 1022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 295 Invalid, 0 Unknown, 697 Unchecked, 0.9s Time] [2021-11-23 02:16:44,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-11-23 02:16:44,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 369. [2021-11-23 02:16:44,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 336 states have (on average 1.1607142857142858) internal successors, (390), 350 states have internal predecessors, (390), 9 states have call successors, (9), 9 states have call predecessors, (9), 15 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) [2021-11-23 02:16:44,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 415 transitions. [2021-11-23 02:16:44,620 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 415 transitions. Word has length 50 [2021-11-23 02:16:44,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:44,621 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 415 transitions. [2021-11-23 02:16:44,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 4.613636363636363) internal successors, (203), 41 states have internal predecessors, (203), 8 states have call successors, (12), 10 states have call predecessors, (12), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-11-23 02:16:44,621 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 415 transitions. [2021-11-23 02:16:44,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-23 02:16:44,622 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:44,622 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:16:44,670 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-11-23 02:16:44,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (57)] Forceful destruction successful, exit code 0 [2021-11-23 02:16:45,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (56)] Forceful destruction successful, exit code 0 [2021-11-23 02:16:45,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 02:16:45,242 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:16:45,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:45,242 INFO L85 PathProgramCache]: Analyzing trace with hash -167943901, now seen corresponding path program 1 times [2021-11-23 02:16:45,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:16:45,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [223703917] [2021-11-23 02:16:45,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:45,243 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:16:45,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:16:45,244 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:16:45,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (59)] Waiting until timeout for monitored process [2021-11-23 02:16:45,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:45,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:16:45,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:16:45,659 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 02:16:45,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:16:46,122 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 02:16:46,122 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:16:46,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [223703917] [2021-11-23 02:16:46,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [223703917] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:16:46,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1410417232] [2021-11-23 02:16:46,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:46,123 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:16:46,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:16:46,124 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:16:46,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (60)] Waiting until timeout for monitored process [2021-11-23 02:16:46,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:46,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:16:46,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:16:46,662 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 02:16:46,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:16:47,119 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 02:16:47,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1410417232] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:16:47,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745292402] [2021-11-23 02:16:47,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:47,120 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:16:47,120 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:16:47,121 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:16:47,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-23 02:16:47,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:47,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 02:16:47,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:16:47,458 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 02:16:47,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:16:47,869 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-23 02:16:47,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745292402] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:16:47,869 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:16:47,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 8 [2021-11-23 02:16:47,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485928120] [2021-11-23 02:16:47,869 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:16:47,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 02:16:47,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:16:47,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 02:16:47,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:16:47,871 INFO L87 Difference]: Start difference. First operand 369 states and 415 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) [2021-11-23 02:16:48,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:48,626 INFO L93 Difference]: Finished difference Result 382 states and 422 transitions. [2021-11-23 02:16:48,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 02:16:48,626 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 [2021-11-23 02:16:48,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:48,628 INFO L225 Difference]: With dead ends: 382 [2021-11-23 02:16:48,629 INFO L226 Difference]: Without dead ends: 382 [2021-11-23 02:16:48,629 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 [2021-11-23 02:16:48,630 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 247 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:48,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [247 Valid, 281 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:16:48,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-11-23 02:16:48,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 368. [2021-11-23 02:16:48,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 336 states have (on average 1.1428571428571428) internal successors, (384), 349 states have internal predecessors, (384), 9 states have call successors, (9), 9 states have call predecessors, (9), 15 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) [2021-11-23 02:16:48,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 409 transitions. [2021-11-23 02:16:48,641 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 409 transitions. Word has length 52 [2021-11-23 02:16:48,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:48,641 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 409 transitions. [2021-11-23 02:16:48,641 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) [2021-11-23 02:16:48,642 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 409 transitions. [2021-11-23 02:16:48,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 02:16:48,643 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:48,643 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:16:48,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-11-23 02:16:48,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (59)] Forceful destruction successful, exit code 0 [2021-11-23 02:16:49,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (60)] Forceful destruction successful, exit code 0 [2021-11-23 02:16:49,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 02:16:49,270 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting parse_inputErr7REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:16:49,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:49,270 INFO L85 PathProgramCache]: Analyzing trace with hash 61178226, now seen corresponding path program 1 times [2021-11-23 02:16:49,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:16:49,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1045640176] [2021-11-23 02:16:49,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:49,271 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:16:49,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:16:49,272 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:16:49,278 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (62)] Waiting until timeout for monitored process [2021-11-23 02:16:49,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:49,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 02:16:49,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:16:50,273 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:16:50,273 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 40 treesize of output 42 [2021-11-23 02:16:50,291 INFO L354 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2021-11-23 02:16:50,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 37 [2021-11-23 02:16:50,615 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 02:16:50,615 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:17:15,613 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 02:17:15,613 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:17:15,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1045640176] [2021-11-23 02:17:15,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1045640176] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:17:15,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [919004819] [2021-11-23 02:17:15,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:15,613 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:17:15,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:17:15,616 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:17:15,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (63)] Waiting until timeout for monitored process [2021-11-23 02:17:15,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:15,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 02:17:15,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:17:16,780 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:17:16,780 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 32 treesize of output 34 [2021-11-23 02:17:16,788 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:17:16,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 27 [2021-11-23 02:17:21,083 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 02:17:21,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:17:43,097 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 02:17:43,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [919004819] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:17:43,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263993727] [2021-11-23 02:17:43,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:43,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:17:43,098 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:17:43,098 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:17:43,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-11-23 02:17:43,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:43,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-23 02:17:43,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:17:44,076 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:17:44,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-11-23 02:17:44,085 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:17:44,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-11-23 02:17:44,319 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 02:17:44,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:17:49,064 WARN L860 $PredicateComparison]: unable to prove that (or (exists ((|v_parse_input_c1_~x~0#1.base_128| (_ BitVec 32))) (and (let ((.cse0 (bvadd |c_~#commands~0.offset| (_ bv9 32)))) (or (not (bvule .cse0 (select (store |c_old(#length)| |v_parse_input_c1_~x~0#1.base_128| (_ bv1 32)) |c_~#commands~0.base|))) (not (bvule (bvadd (_ bv8 32) |c_~#commands~0.offset|) .cse0)))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_parse_input_c1_~x~0#1.base_128|))))) (let ((.cse1 (bvadd |c_~#commands~0.offset| (_ bv9 32)))) (and (bvule (bvadd (_ bv8 32) |c_~#commands~0.offset|) .cse1) (bvule .cse1 (select |c_#length| |c_~#commands~0.base|))))) is different from true [2021-11-23 02:18:00,479 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 26 trivial. 2 not checked. [2021-11-23 02:18:00,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263993727] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:18:00,479 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:18:00,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 14 [2021-11-23 02:18:00,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132069885] [2021-11-23 02:18:00,480 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:18:00,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-23 02:18:00,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:18:00,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-23 02:18:00,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=151, Unknown=6, NotChecked=26, Total=240 [2021-11-23 02:18:00,481 INFO L87 Difference]: Start difference. First operand 368 states and 409 transitions. Second operand has 16 states, 15 states have (on average 5.733333333333333) internal successors, (86), 12 states have internal predecessors, (86), 6 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-23 02:18:02,805 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 (let ((.cse3 (bvadd |c_~#commands~0.offset| (_ bv9 32)))) (and (bvule (bvadd (_ bv8 32) |c_~#commands~0.offset|) .cse3) (bvule .cse3 (select |c_#length| |c_~#commands~0.base|)))))) (and (or (exists ((|v_parse_input_c1_~x~0#1.base_128| (_ BitVec 32))) (and (let ((.cse0 (bvadd |c_~#commands~0.offset| (_ bv9 32)))) (or (not (bvule .cse0 (select (store |c_old(#length)| |v_parse_input_c1_~x~0#1.base_128| (_ bv1 32)) |c_~#commands~0.base|))) (not (bvule (bvadd (_ bv8 32) |c_~#commands~0.offset|) .cse0)))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_parse_input_c1_~x~0#1.base_128|))))) .cse1) (or (exists ((|v_parse_input_c1_~x~0#1.base_128| (_ BitVec 32))) (and (let ((.cse2 (bvadd |c_~#commands~0.offset| (_ bv9 32)))) (or (not (bvule .cse2 (select (store |c_old(#length)| |v_parse_input_c1_~x~0#1.base_128| (_ bv1 32)) |c_~#commands~0.base|))) (not (bvule (bvadd (_ bv8 32) |c_~#commands~0.offset|) .cse2)))) (= (_ bv0 1) (bvneg (bvneg (select |c_old(#valid)| |v_parse_input_c1_~x~0#1.base_128|)))))) .cse1))) is different from true [2021-11-23 02:18:02,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:18:02,914 INFO L93 Difference]: Finished difference Result 373 states and 412 transitions. [2021-11-23 02:18:02,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 02:18:02,915 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 5.733333333333333) internal successors, (86), 12 states have internal predecessors, (86), 6 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) Word has length 54 [2021-11-23 02:18:02,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:18:02,917 INFO L225 Difference]: With dead ends: 373 [2021-11-23 02:18:02,917 INFO L226 Difference]: Without dead ends: 373 [2021-11-23 02:18:02,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 291 SyntacticMatches, 14 SemanticMatches, 18 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 55.1s TimeCoverageRelationStatistics Valid=89, Invalid=218, Unknown=7, NotChecked=66, Total=380 [2021-11-23 02:18:02,918 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 61 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 240 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:18:02,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 238 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 240 Unchecked, 0.2s Time] [2021-11-23 02:18:02,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-11-23 02:18:02,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 368. [2021-11-23 02:18:02,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 336 states have (on average 1.1398809523809523) internal successors, (383), 349 states have internal predecessors, (383), 9 states have call successors, (9), 9 states have call predecessors, (9), 15 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) [2021-11-23 02:18:02,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 408 transitions. [2021-11-23 02:18:02,928 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 408 transitions. Word has length 54 [2021-11-23 02:18:02,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:18:02,929 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 408 transitions. [2021-11-23 02:18:02,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 5.733333333333333) internal successors, (86), 12 states have internal predecessors, (86), 6 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-23 02:18:02,929 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 408 transitions. [2021-11-23 02:18:02,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 02:18:02,930 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:18:02,930 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-23 02:18:02,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (62)] Forceful destruction successful, exit code 0 [2021-11-23 02:18:03,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (63)] Forceful destruction successful, exit code 0 [2021-11-23 02:18:03,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-11-23 02:18:03,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:18:03,544 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting parse_inputErr7REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:18:03,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:18:03,544 INFO L85 PathProgramCache]: Analyzing trace with hash -2004614135, now seen corresponding path program 1 times [2021-11-23 02:18:03,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:18:03,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1375381645] [2021-11-23 02:18:03,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:18:03,545 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:18:03,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:18:03,546 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:18:03,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (65)] Waiting until timeout for monitored process [2021-11-23 02:18:03,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:18:03,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 02:18:03,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:18:04,292 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:18:04,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-11-23 02:18:04,298 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:18:04,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2021-11-23 02:18:04,655 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:18:04,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 28 [2021-11-23 02:18:04,937 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-23 02:18:04,937 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 3 case distinctions, treesize of input 21 treesize of output 26 [2021-11-23 02:18:05,221 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:18:05,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:18:05,892 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 02:18:05,892 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 40 treesize of output 39 [2021-11-23 02:18:08,414 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 02:18:08,415 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 29 treesize of output 28 [2021-11-23 02:18:24,359 WARN L860 $PredicateComparison]: unable to prove that (or (forall ((|v_parse_input_c1_~x~0#1.base_146| (_ BitVec 32))) (or (let ((.cse0 (bvadd |c_~#commands~0.offset| (_ bv9 32)))) (and (bvule .cse0 (select (store |c_#length| |v_parse_input_c1_~x~0#1.base_146| (_ bv1 32)) |c_~#commands~0.base|)) (bvule (bvadd (_ bv8 32) |c_~#commands~0.offset|) .cse0))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_parse_input_c1_~x~0#1.base_146|)))))) (exists ((|v_parse_input_c1_~x~0#1.base_145| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_parse_input_c1_~x~0#1.base_145|))))) (let ((.cse1 (bvadd |c_~#commands~0.offset| (_ bv9 32)))) (or (not (bvule (bvadd (_ bv8 32) |c_~#commands~0.offset|) .cse1)) (not (bvule .cse1 (select (store |c_old(#length)| |v_parse_input_c1_~x~0#1.base_145| (_ bv1 32)) |c_~#commands~0.base|)))))))) is different from true [2021-11-23 02:18:25,778 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 22 not checked. [2021-11-23 02:18:25,778 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 02:18:25,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1375381645] [2021-11-23 02:18:25,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1375381645] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:18:25,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1532307483] [2021-11-23 02:18:25,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:18:25,778 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 02:18:25,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 02:18:25,779 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 02:18:25,780 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (66)] Waiting until timeout for monitored process [2021-11-23 02:18:26,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:18:26,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 02:18:26,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:18:26,469 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:18:26,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-11-23 02:18:26,478 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:18:26,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-11-23 02:18:26,698 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:18:26,698 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 [2021-11-23 02:18:26,920 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-23 02:18:26,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 26 [2021-11-23 02:18:27,144 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:18:27,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:18:27,659 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 02:18:27,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-11-23 02:18:30,110 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 02:18:30,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-11-23 02:18:53,335 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 35 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:18:53,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1532307483] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:18:53,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325021246] [2021-11-23 02:18:53,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:18:53,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:18:53,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:18:53,336 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:18:53,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-11-23 02:18:53,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:18:53,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 02:18:53,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:18:53,778 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:18:53,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2021-11-23 02:18:53,784 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:18:53,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-11-23 02:18:54,028 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 02:18:54,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2021-11-23 02:18:54,211 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-23 02:18:54,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 26 [2021-11-23 02:18:54,412 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:18:54,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:18:54,859 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 02:18:54,859 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 36 treesize of output 35 [2021-11-23 02:18:57,418 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-23 02:18:57,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2021-11-23 02:19:18,894 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 1 proven. 27 refuted. 10 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:19:18,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325021246] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:19:18,895 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 02:19:18,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 8, 7, 8, 7] total 16 [2021-11-23 02:19:18,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365804000] [2021-11-23 02:19:18,895 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 02:19:18,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 02:19:18,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 02:19:18,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 02:19:18,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=203, Unknown=13, NotChecked=30, Total=306 [2021-11-23 02:19:18,896 INFO L87 Difference]: Start difference. First operand 368 states and 408 transitions. Second operand has 18 states, 17 states have (on average 7.588235294117647) internal successors, (129), 15 states have internal predecessors, (129), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 02:19:25,343 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 (bvmul |c_parse_input_~i~0#1| (_ bv9 32)))) (let ((.cse0 (bvadd .cse1 |c_~#commands~0.offset| (_ bv9 32)))) (and (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (select |c_#valid| |c_~#commands~0.base|))))) (= |c_old(#valid)| |c_#valid|) (bvule .cse0 (select |c_#length| |c_~#commands~0.base|)) (= |c_#length| |c_old(#length)|) (= (_ bv0 32) |c_~#commands~0.offset|) (= (_ bv6 32) |c_~#commands~0.base|) (bvule (bvadd (_ bv8 32) .cse1 |c_~#commands~0.offset|) .cse0) (or (forall ((|v_parse_input_c1_~x~0#1.base_146| (_ BitVec 32))) (or (let ((.cse2 (bvadd |c_~#commands~0.offset| (_ bv9 32)))) (and (bvule .cse2 (select (store |c_#length| |v_parse_input_c1_~x~0#1.base_146| (_ bv1 32)) |c_~#commands~0.base|)) (bvule (bvadd (_ bv8 32) |c_~#commands~0.offset|) .cse2))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_parse_input_c1_~x~0#1.base_146|)))))) (exists ((|v_parse_input_c1_~x~0#1.base_145| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_parse_input_c1_~x~0#1.base_145|))))) (let ((.cse3 (bvadd |c_~#commands~0.offset| (_ bv9 32)))) (or (not (bvule (bvadd (_ bv8 32) |c_~#commands~0.offset|) .cse3)) (not (bvule .cse3 (select (store |c_old(#length)| |v_parse_input_c1_~x~0#1.base_145| (_ bv1 32)) |c_~#commands~0.base|))))))))))) is different from false [2021-11-23 02:19:39,777 WARN L227 SmtUtils]: Spent 6.09s on a formula simplification that was a NOOP. DAG size: 28 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:19:45,972 WARN L227 SmtUtils]: Spent 6.04s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:20:00,111 WARN L227 SmtUtils]: Spent 14.08s on a formula simplification. DAG size of input: 42 DAG size of output: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:20:12,863 WARN L227 SmtUtils]: Spent 6.16s on a formula simplification that was a NOOP. DAG size: 35 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:20:14,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:20:14,997 INFO L93 Difference]: Finished difference Result 394 states and 434 transitions. [2021-11-23 02:20:14,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 02:20:14,998 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 7.588235294117647) internal successors, (129), 15 states have internal predecessors, (129), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) Word has length 54 [2021-11-23 02:20:14,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:20:15,000 INFO L225 Difference]: With dead ends: 394 [2021-11-23 02:20:15,000 INFO L226 Difference]: Without dead ends: 394 [2021-11-23 02:20:15,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 288 SyntacticMatches, 18 SemanticMatches, 29 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 118.6s TimeCoverageRelationStatistics Valid=178, Invalid=620, Unknown=22, NotChecked=110, Total=930 [2021-11-23 02:20:15,001 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 69 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 340 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:20:15,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 326 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 71 Invalid, 0 Unknown, 340 Unchecked, 0.3s Time] [2021-11-23 02:20:15,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-11-23 02:20:15,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 367. [2021-11-23 02:20:15,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 335 states have (on average 1.1343283582089552) internal successors, (380), 348 states have internal predecessors, (380), 9 states have call successors, (9), 9 states have call predecessors, (9), 15 states have return successors, (16), 9 states have call predecessors, (16), 9 states have call successors, (16) [2021-11-23 02:20:15,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 405 transitions. [2021-11-23 02:20:15,011 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 405 transitions. Word has length 54 [2021-11-23 02:20:15,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:20:15,011 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 405 transitions. [2021-11-23 02:20:15,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 7.588235294117647) internal successors, (129), 15 states have internal predecessors, (129), 4 states have call successors, (7), 7 states have call predecessors, (7), 4 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-23 02:20:15,012 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 405 transitions. [2021-11-23 02:20:15,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-23 02:20:15,012 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:20:15,013 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] [2021-11-23 02:20:15,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (65)] Forceful destruction successful, exit code 0 [2021-11-23 02:20:15,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (66)] Forceful destruction successful, exit code 0 [2021-11-23 02:20:15,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-11-23 02:20:15,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:20:15,626 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting parse_inputErr1REQUIRES_VIOLATION === [parse_inputErr0REQUIRES_VIOLATION, parse_inputErr1REQUIRES_VIOLATION, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2021-11-23 02:20:15,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:20:15,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1335422540, now seen corresponding path program 3 times [2021-11-23 02:20:15,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 02:20:15,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [868607687] [2021-11-23 02:20:15,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:20:15,627 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 02:20:15,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 02:20:15,628 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 02:20:15,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12c0a455-9838-4293-8c49-6e46d1354aba/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (68)] Waiting until timeout for monitored process [2021-11-23 02:20:15,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 02:20:15,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:20:15,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-23 02:20:15,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:20:16,477 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 02:20:16,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-11-23 02:20:16,482 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-23 02:20:16,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 22 [2021-11-23 02:20:16,819 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 02:20:16,819 INFO L328 TraceCheckSpWp]: Computing backward predicates...