./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--gpu--drm--ast--ast.ko-main.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8769721-b810-45e9-99f0-23abad4a68ed/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8769721-b810-45e9-99f0-23abad4a68ed/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_f8769721-b810-45e9-99f0-23abad4a68ed/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8769721-b810-45e9-99f0-23abad4a68ed/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--gpu--drm--ast--ast.ko-main.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8769721-b810-45e9-99f0-23abad4a68ed/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8769721-b810-45e9-99f0-23abad4a68ed/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash e37e45521ffb127b83b9baab443e42b7c078cf8a8451cb2a1813ac325e01717d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:36:54,818 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:36:54,820 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:36:54,855 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:36:54,855 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:36:54,857 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:36:54,859 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:36:54,861 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:36:54,864 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:36:54,865 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:36:54,866 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:36:54,868 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:36:54,869 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:36:54,870 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:36:54,872 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:36:54,874 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:36:54,875 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:36:54,876 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:36:54,878 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:36:54,881 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:36:54,883 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:36:54,885 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:36:54,886 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:36:54,887 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:36:54,891 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:36:54,892 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:36:54,892 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:36:54,894 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:36:54,894 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:36:54,895 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:36:54,896 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:36:54,897 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:36:54,898 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:36:54,899 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:36:54,901 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:36:54,901 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:36:54,902 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:36:54,902 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:36:54,902 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:36:54,903 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:36:54,904 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:36:54,905 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8769721-b810-45e9-99f0-23abad4a68ed/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 03:36:54,933 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:36:54,933 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:36:54,933 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:36:54,934 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:36:54,934 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:36:54,935 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:36:54,935 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:36:54,935 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:36:54,935 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:36:54,936 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:36:54,936 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:36:54,936 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:36:54,936 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:36:54,937 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:36:54,937 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:36:54,937 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:36:54,937 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:36:54,938 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:36:54,938 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:36:54,939 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:36:54,939 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:36:54,939 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:36:54,939 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:36:54,940 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:36:54,940 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:36:54,940 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:36:54,940 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:36:54,941 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:36:54,941 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:36:54,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:36:54,941 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:36:54,942 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:36:54,942 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:36:54,942 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:36:54,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:36:54,942 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:36:54,943 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:36:54,943 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:36:54,943 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_f8769721-b810-45e9-99f0-23abad4a68ed/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8769721-b810-45e9-99f0-23abad4a68ed/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e37e45521ffb127b83b9baab443e42b7c078cf8a8451cb2a1813ac325e01717d [2021-11-23 03:36:55,173 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:36:55,200 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:36:55,203 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:36:55,204 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:36:55,205 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:36:55,206 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8769721-b810-45e9-99f0-23abad4a68ed/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--gpu--drm--ast--ast.ko-main.cil.out.i [2021-11-23 03:36:55,275 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8769721-b810-45e9-99f0-23abad4a68ed/bin/utaipan-EQgc7hIp5V/data/ff6fe3e79/46c6563b01204fb38ed0802a8443efd6/FLAGed9fa5036 [2021-11-23 03:36:56,418 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:36:56,419 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8769721-b810-45e9-99f0-23abad4a68ed/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--gpu--drm--ast--ast.ko-main.cil.out.i [2021-11-23 03:36:56,479 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8769721-b810-45e9-99f0-23abad4a68ed/bin/utaipan-EQgc7hIp5V/data/ff6fe3e79/46c6563b01204fb38ed0802a8443efd6/FLAGed9fa5036 [2021-11-23 03:36:56,725 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8769721-b810-45e9-99f0-23abad4a68ed/bin/utaipan-EQgc7hIp5V/data/ff6fe3e79/46c6563b01204fb38ed0802a8443efd6 [2021-11-23 03:36:56,727 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:36:56,729 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:36:56,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:36:56,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:36:56,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:36:56,735 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:36:56" (1/1) ... [2021-11-23 03:36:56,736 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34544b0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:36:56, skipping insertion in model container [2021-11-23 03:36:56,736 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:36:56" (1/1) ... [2021-11-23 03:36:56,743 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:36:56,927 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:37:00,559 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8769721-b810-45e9-99f0-23abad4a68ed/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--gpu--drm--ast--ast.ko-main.cil.out.i[353005,353018] [2021-11-23 03:37:00,826 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:37:00,912 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:37:01,381 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8769721-b810-45e9-99f0-23abad4a68ed/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--gpu--drm--ast--ast.ko-main.cil.out.i[353005,353018] [2021-11-23 03:37:01,445 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:37:01,796 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:37:01,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:01 WrapperNode [2021-11-23 03:37:01,797 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:37:01,798 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:37:01,798 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:37:01,799 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:37:01,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:01" (1/1) ... [2021-11-23 03:37:01,982 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:01" (1/1) ... [2021-11-23 03:37:02,296 INFO L137 Inliner]: procedures = 511, calls = 3849, calls flagged for inlining = 265, calls inlined = 264, statements flattened = 9561 [2021-11-23 03:37:02,297 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:37:02,298 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:37:02,298 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:37:02,298 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:37:02,307 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:01" (1/1) ... [2021-11-23 03:37:02,307 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:01" (1/1) ... [2021-11-23 03:37:02,348 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:01" (1/1) ... [2021-11-23 03:37:02,348 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:01" (1/1) ... [2021-11-23 03:37:02,622 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:01" (1/1) ... [2021-11-23 03:37:02,663 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:01" (1/1) ... [2021-11-23 03:37:02,715 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:01" (1/1) ... [2021-11-23 03:37:02,774 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:37:02,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:37:02,777 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:37:02,778 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:37:02,778 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:01" (1/1) ... [2021-11-23 03:37:02,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:37:02,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8769721-b810-45e9-99f0-23abad4a68ed/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:37:02,817 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8769721-b810-45e9-99f0-23abad4a68ed/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:37:02,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8769721-b810-45e9-99f0-23abad4a68ed/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:37:02,867 INFO L130 BoogieDeclarations]: Found specification of procedure drm_global_item_ref [2021-11-23 03:37:02,868 INFO L138 BoogieDeclarations]: Found implementation of procedure drm_global_item_ref [2021-11-23 03:37:02,868 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 03:37:02,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 03:37:02,868 INFO L130 BoogieDeclarations]: Found specification of procedure ast_drm_freeze [2021-11-23 03:37:02,868 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_drm_freeze [2021-11-23 03:37:02,868 INFO L130 BoogieDeclarations]: Found specification of procedure drm_helper_probe_single_connector_modes [2021-11-23 03:37:02,869 INFO L138 BoogieDeclarations]: Found implementation of procedure drm_helper_probe_single_connector_modes [2021-11-23 03:37:02,869 INFO L130 BoogieDeclarations]: Found specification of procedure ast_crtc_dpms [2021-11-23 03:37:02,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_crtc_dpms [2021-11-23 03:37:02,869 INFO L130 BoogieDeclarations]: Found specification of procedure ast_bo_pin [2021-11-23 03:37:02,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_bo_pin [2021-11-23 03:37:02,869 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_struct_mutex_of_drm_device [2021-11-23 03:37:02,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_struct_mutex_of_drm_device [2021-11-23 03:37:02,870 INFO L130 BoogieDeclarations]: Found specification of procedure ast_read32 [2021-11-23 03:37:02,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_read32 [2021-11-23 03:37:02,870 INFO L130 BoogieDeclarations]: Found specification of procedure pci_get_drvdata [2021-11-23 03:37:02,870 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_get_drvdata [2021-11-23 03:37:02,870 INFO L130 BoogieDeclarations]: Found specification of procedure cbr_dll2 [2021-11-23 03:37:02,870 INFO L138 BoogieDeclarations]: Found implementation of procedure cbr_dll2 [2021-11-23 03:37:02,871 INFO L130 BoogieDeclarations]: Found specification of procedure ast_crtc_mode_fixup [2021-11-23 03:37:02,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_crtc_mode_fixup [2021-11-23 03:37:02,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:37:02,871 INFO L130 BoogieDeclarations]: Found specification of procedure moutdwm [2021-11-23 03:37:02,871 INFO L138 BoogieDeclarations]: Found implementation of procedure moutdwm [2021-11-23 03:37:02,871 INFO L130 BoogieDeclarations]: Found specification of procedure ast_drm_thaw [2021-11-23 03:37:02,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_drm_thaw [2021-11-23 03:37:02,872 INFO L130 BoogieDeclarations]: Found specification of procedure ast_dirty_update [2021-11-23 03:37:02,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_dirty_update [2021-11-23 03:37:02,872 INFO L130 BoogieDeclarations]: Found specification of procedure ast_set_index_reg_mask [2021-11-23 03:37:02,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_set_index_reg_mask [2021-11-23 03:37:02,872 INFO L130 BoogieDeclarations]: Found specification of procedure ttm_bo_kmap [2021-11-23 03:37:02,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ttm_bo_kmap [2021-11-23 03:37:02,873 INFO L130 BoogieDeclarations]: Found specification of procedure ast_ttm_placement [2021-11-23 03:37:02,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_ttm_placement [2021-11-23 03:37:02,873 INFO L130 BoogieDeclarations]: Found specification of procedure ast_crtc_load_lut [2021-11-23 03:37:02,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_crtc_load_lut [2021-11-23 03:37:02,874 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-23 03:37:02,874 INFO L130 BoogieDeclarations]: Found specification of procedure ttm_bo_kunmap [2021-11-23 03:37:02,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ttm_bo_kunmap [2021-11-23 03:37:02,874 INFO L130 BoogieDeclarations]: Found specification of procedure drm_global_item_unref [2021-11-23 03:37:02,874 INFO L138 BoogieDeclarations]: Found implementation of procedure drm_global_item_unref [2021-11-23 03:37:02,875 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 03:37:02,875 INFO L130 BoogieDeclarations]: Found specification of procedure ast_user_framebuffer_destroy [2021-11-23 03:37:02,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_user_framebuffer_destroy [2021-11-23 03:37:02,875 INFO L130 BoogieDeclarations]: Found specification of procedure ast_crtc_disable [2021-11-23 03:37:02,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_crtc_disable [2021-11-23 03:37:02,876 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 03:37:02,876 INFO L130 BoogieDeclarations]: Found specification of procedure ast_crtc_mode_set_base [2021-11-23 03:37:02,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_crtc_mode_set_base [2021-11-23 03:37:02,877 INFO L130 BoogieDeclarations]: Found specification of procedure pci_iomap [2021-11-23 03:37:02,878 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_iomap [2021-11-23 03:37:02,878 INFO L130 BoogieDeclarations]: Found specification of procedure mindwm [2021-11-23 03:37:02,878 INFO L138 BoogieDeclarations]: Found implementation of procedure mindwm [2021-11-23 03:37:02,878 INFO L130 BoogieDeclarations]: Found specification of procedure ast_io_read8 [2021-11-23 03:37:02,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_io_read8 [2021-11-23 03:37:02,878 INFO L130 BoogieDeclarations]: Found specification of procedure kref_put [2021-11-23 03:37:02,878 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_put [2021-11-23 03:37:02,879 INFO L130 BoogieDeclarations]: Found specification of procedure ast_user_framebuffer_create_handle [2021-11-23 03:37:02,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_user_framebuffer_create_handle [2021-11-23 03:37:02,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 03:37:02,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:37:02,880 INFO L130 BoogieDeclarations]: Found specification of procedure ast_crtc_gamma_set [2021-11-23 03:37:02,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_crtc_gamma_set [2021-11-23 03:37:02,880 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-23 03:37:02,881 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-23 03:37:02,881 INFO L130 BoogieDeclarations]: Found specification of procedure ast_fbdev_set_suspend [2021-11-23 03:37:02,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_fbdev_set_suspend [2021-11-23 03:37:02,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 03:37:02,881 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 03:37:02,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-23 03:37:02,882 INFO L130 BoogieDeclarations]: Found specification of procedure ast_framebuffer_init [2021-11-23 03:37:02,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_framebuffer_init [2021-11-23 03:37:02,883 INFO L130 BoogieDeclarations]: Found specification of procedure ast_cursor_set [2021-11-23 03:37:02,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_cursor_set [2021-11-23 03:37:02,883 INFO L130 BoogieDeclarations]: Found specification of procedure ast_open_key [2021-11-23 03:37:02,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_open_key [2021-11-23 03:37:02,883 INFO L130 BoogieDeclarations]: Found specification of procedure ttm_bo_validate [2021-11-23 03:37:02,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ttm_bo_validate [2021-11-23 03:37:02,884 INFO L130 BoogieDeclarations]: Found specification of procedure mmc_test_burst2 [2021-11-23 03:37:02,884 INFO L138 BoogieDeclarations]: Found implementation of procedure mmc_test_burst2 [2021-11-23 03:37:02,884 INFO L130 BoogieDeclarations]: Found specification of procedure ast_bo_unreserve [2021-11-23 03:37:02,884 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_bo_unreserve [2021-11-23 03:37:02,947 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2021-11-23 03:37:02,947 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2021-11-23 03:37:02,947 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:37:02,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:37:02,948 INFO L130 BoogieDeclarations]: Found specification of procedure kref_sub [2021-11-23 03:37:02,948 INFO L138 BoogieDeclarations]: Found implementation of procedure kref_sub [2021-11-23 03:37:02,948 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-23 03:37:02,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 03:37:02,948 INFO L130 BoogieDeclarations]: Found specification of procedure ast_connector_detect [2021-11-23 03:37:02,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_connector_detect [2021-11-23 03:37:02,948 INFO L130 BoogieDeclarations]: Found specification of procedure ast_encoder_prepare [2021-11-23 03:37:02,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_encoder_prepare [2021-11-23 03:37:02,948 INFO L130 BoogieDeclarations]: Found specification of procedure ast_get_index_reg_mask [2021-11-23 03:37:02,948 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_get_index_reg_mask [2021-11-23 03:37:02,949 INFO L130 BoogieDeclarations]: Found specification of procedure ast_gem_create [2021-11-23 03:37:02,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_gem_create [2021-11-23 03:37:02,949 INFO L130 BoogieDeclarations]: Found specification of procedure ast_crtc_prepare [2021-11-23 03:37:02,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_crtc_prepare [2021-11-23 03:37:02,949 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-23 03:37:02,949 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-23 03:37:02,949 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-23 03:37:02,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-23 03:37:02,949 INFO L130 BoogieDeclarations]: Found specification of procedure ast_bo_reserve [2021-11-23 03:37:02,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_bo_reserve [2021-11-23 03:37:02,950 INFO L130 BoogieDeclarations]: Found specification of procedure drm_gem_object_unreference_unlocked [2021-11-23 03:37:02,950 INFO L138 BoogieDeclarations]: Found implementation of procedure drm_gem_object_unreference_unlocked [2021-11-23 03:37:02,950 INFO L130 BoogieDeclarations]: Found specification of procedure ast_mmap [2021-11-23 03:37:02,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_mmap [2021-11-23 03:37:02,950 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-11-23 03:37:02,950 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-11-23 03:37:02,950 INFO L130 BoogieDeclarations]: Found specification of procedure ERR_PTR [2021-11-23 03:37:02,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ERR_PTR [2021-11-23 03:37:02,950 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 03:37:02,950 INFO L130 BoogieDeclarations]: Found specification of procedure drm_gem_object_free [2021-11-23 03:37:02,950 INFO L130 BoogieDeclarations]: Found specification of procedure ttm_bo_global_release [2021-11-23 03:37:02,951 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_struct_mutex_of_drm_device [2021-11-23 03:37:02,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_struct_mutex_of_drm_device [2021-11-23 03:37:02,951 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 03:37:02,951 INFO L130 BoogieDeclarations]: Found specification of procedure ast_connector_destroy [2021-11-23 03:37:02,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_connector_destroy [2021-11-23 03:37:02,951 INFO L130 BoogieDeclarations]: Found specification of procedure ast_crtc_commit [2021-11-23 03:37:02,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_crtc_commit [2021-11-23 03:37:02,951 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 03:37:02,951 INFO L130 BoogieDeclarations]: Found specification of procedure ast_pm_resume [2021-11-23 03:37:02,951 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_pm_resume [2021-11-23 03:37:02,951 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-23 03:37:02,952 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-23 03:37:02,952 INFO L130 BoogieDeclarations]: Found specification of procedure ast_io_write8 [2021-11-23 03:37:02,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_io_write8 [2021-11-23 03:37:02,952 INFO L130 BoogieDeclarations]: Found specification of procedure ttm_kmap_obj_virtual [2021-11-23 03:37:02,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ttm_kmap_obj_virtual [2021-11-23 03:37:02,952 INFO L130 BoogieDeclarations]: Found specification of procedure ast_encoder_destroy [2021-11-23 03:37:02,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_encoder_destroy [2021-11-23 03:37:02,952 INFO L130 BoogieDeclarations]: Found specification of procedure ast_bo_gpu_offset [2021-11-23 03:37:02,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_bo_gpu_offset [2021-11-23 03:37:02,952 INFO L130 BoogieDeclarations]: Found specification of procedure ast_write32 [2021-11-23 03:37:02,952 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_write32 [2021-11-23 03:37:02,953 INFO L130 BoogieDeclarations]: Found specification of procedure ast_crtc_reset [2021-11-23 03:37:02,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_crtc_reset [2021-11-23 03:37:02,953 INFO L130 BoogieDeclarations]: Found specification of procedure ast_gem_free_object [2021-11-23 03:37:02,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_gem_free_object [2021-11-23 03:37:02,953 INFO L130 BoogieDeclarations]: Found specification of procedure drm_gem_object_unreference_unlocked___0 [2021-11-23 03:37:02,953 INFO L138 BoogieDeclarations]: Found implementation of procedure drm_gem_object_unreference_unlocked___0 [2021-11-23 03:37:02,953 INFO L130 BoogieDeclarations]: Found specification of procedure ast_ttm_backend_destroy [2021-11-23 03:37:02,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_ttm_backend_destroy [2021-11-23 03:37:02,953 INFO L130 BoogieDeclarations]: Found specification of procedure ast_pci_remove [2021-11-23 03:37:02,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_pci_remove [2021-11-23 03:37:02,953 INFO L130 BoogieDeclarations]: Found specification of procedure drm_helper_connector_dpms [2021-11-23 03:37:02,954 INFO L138 BoogieDeclarations]: Found implementation of procedure drm_helper_connector_dpms [2021-11-23 03:37:02,954 INFO L130 BoogieDeclarations]: Found specification of procedure ast_crtc_mode_set [2021-11-23 03:37:02,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_crtc_mode_set [2021-11-23 03:37:02,954 INFO L130 BoogieDeclarations]: Found specification of procedure mmc_test_single2 [2021-11-23 03:37:02,954 INFO L138 BoogieDeclarations]: Found implementation of procedure mmc_test_single2 [2021-11-23 03:37:02,954 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-23 03:37:02,954 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-23 03:37:02,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 03:37:02,954 INFO L130 BoogieDeclarations]: Found specification of procedure ast_set_index_reg [2021-11-23 03:37:02,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_set_index_reg [2021-11-23 03:37:02,954 INFO L130 BoogieDeclarations]: Found specification of procedure cbrdlli_ast2150 [2021-11-23 03:37:02,955 INFO L138 BoogieDeclarations]: Found implementation of procedure cbrdlli_ast2150 [2021-11-23 03:37:02,955 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-23 03:37:02,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-23 03:37:02,955 INFO L130 BoogieDeclarations]: Found specification of procedure drm_fasync [2021-11-23 03:37:02,955 INFO L138 BoogieDeclarations]: Found implementation of procedure drm_fasync [2021-11-23 03:37:02,955 INFO L130 BoogieDeclarations]: Found specification of procedure drm_framebuffer_cleanup [2021-11-23 03:37:02,955 INFO L138 BoogieDeclarations]: Found implementation of procedure drm_framebuffer_cleanup [2021-11-23 03:37:02,955 INFO L130 BoogieDeclarations]: Found specification of procedure ast_encoder_commit [2021-11-23 03:37:02,955 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_encoder_commit [2021-11-23 03:37:02,955 INFO L130 BoogieDeclarations]: Found specification of procedure drm_crtc_helper_set_config [2021-11-23 03:37:02,956 INFO L138 BoogieDeclarations]: Found implementation of procedure drm_crtc_helper_set_config [2021-11-23 03:37:02,956 INFO L130 BoogieDeclarations]: Found specification of procedure console_lock [2021-11-23 03:37:02,956 INFO L138 BoogieDeclarations]: Found implementation of procedure console_lock [2021-11-23 03:37:02,956 INFO L130 BoogieDeclarations]: Found specification of procedure ast_cursor_move [2021-11-23 03:37:02,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_cursor_move [2021-11-23 03:37:02,956 INFO L130 BoogieDeclarations]: Found specification of procedure console_unlock [2021-11-23 03:37:02,956 INFO L138 BoogieDeclarations]: Found implementation of procedure console_unlock [2021-11-23 03:37:02,956 INFO L130 BoogieDeclarations]: Found specification of procedure drm_poll [2021-11-23 03:37:02,956 INFO L138 BoogieDeclarations]: Found implementation of procedure drm_poll [2021-11-23 03:37:02,956 INFO L130 BoogieDeclarations]: Found specification of procedure drm_mode_connector_update_edid_property [2021-11-23 03:37:02,957 INFO L138 BoogieDeclarations]: Found implementation of procedure drm_mode_connector_update_edid_property [2021-11-23 03:37:02,957 INFO L130 BoogieDeclarations]: Found specification of procedure cbr_scan2 [2021-11-23 03:37:02,957 INFO L138 BoogieDeclarations]: Found implementation of procedure cbr_scan2 [2021-11-23 03:37:02,957 INFO L130 BoogieDeclarations]: Found specification of procedure pci_iounmap [2021-11-23 03:37:02,957 INFO L138 BoogieDeclarations]: Found implementation of procedure pci_iounmap [2021-11-23 03:37:02,957 INFO L130 BoogieDeclarations]: Found specification of procedure ast_ttm_tt_unpopulate [2021-11-23 03:37:02,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_ttm_tt_unpopulate [2021-11-23 03:37:02,957 INFO L130 BoogieDeclarations]: Found specification of procedure drm_gem_object_lookup [2021-11-23 03:37:02,957 INFO L138 BoogieDeclarations]: Found implementation of procedure drm_gem_object_lookup [2021-11-23 03:37:02,957 INFO L130 BoogieDeclarations]: Found specification of procedure ast_crtc_destroy [2021-11-23 03:37:02,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ast_crtc_destroy [2021-11-23 03:37:02,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 03:37:03,962 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:37:03,979 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:37:18,230 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ast_gem_init_object_returnLabel#1: main_#t~ret94#1 := ast_gem_init_object_#res#1;assume { :end_inline_ast_gem_init_object } true;assume -2147483648 <= main_#t~ret94#1 && main_#t~ret94#1 <= 2147483647;havoc main_#t~ret94#1;~ldv_state_variable_13~0 := 1; [2021-11-23 03:37:18,309 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:37:21,903 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:37:21,904 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 03:37:21,912 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:37:21 BoogieIcfgContainer [2021-11-23 03:37:21,913 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:37:21,917 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:37:21,917 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:37:21,920 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:37:21,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:36:56" (1/3) ... [2021-11-23 03:37:21,921 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50e510b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:37:21, skipping insertion in model container [2021-11-23 03:37:21,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:37:01" (2/3) ... [2021-11-23 03:37:21,922 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50e510b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:37:21, skipping insertion in model container [2021-11-23 03:37:21,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:37:21" (3/3) ... [2021-11-23 03:37:21,923 INFO L111 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--gpu--drm--ast--ast.ko-main.cil.out.i [2021-11-23 03:37:21,929 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:37:21,929 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 03:37:21,998 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:37:22,010 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:37:22,010 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 03:37:22,085 INFO L276 IsEmpty]: Start isEmpty. Operand has 1802 states, 1065 states have (on average 1.4272300469483568) internal successors, (1520), 1123 states have internal predecessors, (1520), 647 states have call successors, (647), 88 states have call predecessors, (647), 88 states have return successors, (647), 627 states have call predecessors, (647), 647 states have call successors, (647) [2021-11-23 03:37:22,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 03:37:22,096 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:37:22,097 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:37:22,097 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:37:22,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:37:22,107 INFO L85 PathProgramCache]: Analyzing trace with hash -173732282, now seen corresponding path program 1 times [2021-11-23 03:37:22,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:37:22,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849215565] [2021-11-23 03:37:22,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:37:22,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:37:22,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:37:23,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:37:23,013 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:37:23,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849215565] [2021-11-23 03:37:23,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849215565] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:37:23,014 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:37:23,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:37:23,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962095750] [2021-11-23 03:37:23,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:37:23,022 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:37:23,022 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:37:23,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:37:23,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:37:23,071 INFO L87 Difference]: Start difference. First operand has 1802 states, 1065 states have (on average 1.4272300469483568) internal successors, (1520), 1123 states have internal predecessors, (1520), 647 states have call successors, (647), 88 states have call predecessors, (647), 88 states have return successors, (647), 627 states have call predecessors, (647), 647 states have call successors, (647) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:37:26,454 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:37:28,321 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:37:30,453 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:37:35,069 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:37:37,105 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:37:39,131 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:37:41,176 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:37:41,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:37:41,793 INFO L93 Difference]: Finished difference Result 5384 states and 8468 transitions. [2021-11-23 03:37:41,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:37:41,796 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-23 03:37:41,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:37:41,860 INFO L225 Difference]: With dead ends: 5384 [2021-11-23 03:37:41,860 INFO L226 Difference]: Without dead ends: 3579 [2021-11-23 03:37:41,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:37:41,888 INFO L933 BasicCegarLoop]: 3148 mSDtfsCounter, 2761 mSDsluCounter, 2791 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 2 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2763 SdHoareTripleChecker+Valid, 5655 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:37:41,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2763 Valid, 5655 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 578 Invalid, 4 Unknown, 0 Unchecked, 18.4s Time] [2021-11-23 03:37:41,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3579 states. [2021-11-23 03:37:42,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3579 to 3571. [2021-11-23 03:37:42,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3571 states, 2113 states have (on average 1.4221486038807383) internal successors, (3005), 2217 states have internal predecessors, (3005), 1283 states have call successors, (1283), 175 states have call predecessors, (1283), 174 states have return successors, (1274), 1230 states have call predecessors, (1274), 1272 states have call successors, (1274) [2021-11-23 03:37:42,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3571 states to 3571 states and 5562 transitions. [2021-11-23 03:37:42,460 INFO L78 Accepts]: Start accepts. Automaton has 3571 states and 5562 transitions. Word has length 14 [2021-11-23 03:37:42,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:37:42,460 INFO L470 AbstractCegarLoop]: Abstraction has 3571 states and 5562 transitions. [2021-11-23 03:37:42,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:37:42,461 INFO L276 IsEmpty]: Start isEmpty. Operand 3571 states and 5562 transitions. [2021-11-23 03:37:42,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 03:37:42,470 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:37:42,470 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:37:42,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 03:37:42,471 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:37:42,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:37:42,474 INFO L85 PathProgramCache]: Analyzing trace with hash 328606933, now seen corresponding path program 1 times [2021-11-23 03:37:42,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:37:42,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225300538] [2021-11-23 03:37:42,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:37:42,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:37:42,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:37:42,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:37:42,826 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:37:42,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225300538] [2021-11-23 03:37:42,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225300538] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:37:42,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:37:42,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:37:42,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322754377] [2021-11-23 03:37:42,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:37:42,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:37:42,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:37:42,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:37:42,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:37:42,829 INFO L87 Difference]: Start difference. First operand 3571 states and 5562 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:37:46,045 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:37:48,231 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:37:50,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:37:50,820 INFO L93 Difference]: Finished difference Result 3925 states and 6109 transitions. [2021-11-23 03:37:50,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:37:50,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-23 03:37:50,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:37:50,853 INFO L225 Difference]: With dead ends: 3925 [2021-11-23 03:37:50,854 INFO L226 Difference]: Without dead ends: 3922 [2021-11-23 03:37:50,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:37:50,864 INFO L933 BasicCegarLoop]: 2660 mSDtfsCounter, 2781 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2783 SdHoareTripleChecker+Valid, 3152 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:37:50,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2783 Valid, 3152 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 338 Invalid, 1 Unknown, 0 Unchecked, 7.8s Time] [2021-11-23 03:37:50,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3922 states. [2021-11-23 03:37:51,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3922 to 3916. [2021-11-23 03:37:51,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 2288 states have (on average 1.4134615384615385) internal successors, (3234), 2400 states have internal predecessors, (3234), 1436 states have call successors, (1436), 192 states have call predecessors, (1436), 191 states have return successors, (1428), 1383 states have call predecessors, (1428), 1426 states have call successors, (1428) [2021-11-23 03:37:51,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 6098 transitions. [2021-11-23 03:37:51,338 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 6098 transitions. Word has length 16 [2021-11-23 03:37:51,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:37:51,339 INFO L470 AbstractCegarLoop]: Abstraction has 3916 states and 6098 transitions. [2021-11-23 03:37:51,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:37:51,339 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 6098 transitions. [2021-11-23 03:37:51,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 03:37:51,341 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:37:51,341 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:37:51,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 03:37:51,342 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:37:51,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:37:51,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1595766691, now seen corresponding path program 1 times [2021-11-23 03:37:51,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:37:51,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214811120] [2021-11-23 03:37:51,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:37:51,343 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:37:51,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:37:51,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:37:51,715 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:37:51,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214811120] [2021-11-23 03:37:51,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214811120] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:37:51,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:37:51,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:37:51,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043107634] [2021-11-23 03:37:51,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:37:51,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:37:51,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:37:51,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:37:51,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:37:51,718 INFO L87 Difference]: Start difference. First operand 3916 states and 6098 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:37:54,499 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:37:56,513 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:37:58,725 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:38:00,760 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:38:02,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:38:02,219 INFO L93 Difference]: Finished difference Result 4632 states and 7175 transitions. [2021-11-23 03:38:02,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:38:02,219 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-23 03:38:02,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:38:02,258 INFO L225 Difference]: With dead ends: 4632 [2021-11-23 03:38:02,259 INFO L226 Difference]: Without dead ends: 4629 [2021-11-23 03:38:02,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:38:02,264 INFO L933 BasicCegarLoop]: 2811 mSDtfsCounter, 2747 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2752 SdHoareTripleChecker+Valid, 3561 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:38:02,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2752 Valid, 3561 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 390 Invalid, 2 Unknown, 0 Unchecked, 10.3s Time] [2021-11-23 03:38:02,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4629 states. [2021-11-23 03:38:02,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4629 to 4595. [2021-11-23 03:38:02,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4595 states, 2637 states have (on average 1.3959044368600682) internal successors, (3681), 2766 states have internal predecessors, (3681), 1728 states have call successors, (1728), 230 states have call predecessors, (1728), 229 states have return successors, (1721), 1670 states have call predecessors, (1721), 1719 states have call successors, (1721) [2021-11-23 03:38:02,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4595 states to 4595 states and 7130 transitions. [2021-11-23 03:38:02,911 INFO L78 Accepts]: Start accepts. Automaton has 4595 states and 7130 transitions. Word has length 17 [2021-11-23 03:38:02,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:38:02,912 INFO L470 AbstractCegarLoop]: Abstraction has 4595 states and 7130 transitions. [2021-11-23 03:38:02,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:38:02,913 INFO L276 IsEmpty]: Start isEmpty. Operand 4595 states and 7130 transitions. [2021-11-23 03:38:02,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 03:38:02,914 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:38:02,915 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 03:38:02,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 03:38:02,915 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:38:02,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:38:02,920 INFO L85 PathProgramCache]: Analyzing trace with hash -2071948904, now seen corresponding path program 1 times [2021-11-23 03:38:02,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:38:02,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710307770] [2021-11-23 03:38:02,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:38:02,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:38:03,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:38:03,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:38:03,257 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:38:03,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710307770] [2021-11-23 03:38:03,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710307770] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:38:03,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:38:03,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:38:03,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115881550] [2021-11-23 03:38:03,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:38:03,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:38:03,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:38:03,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:38:03,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:38:03,264 INFO L87 Difference]: Start difference. First operand 4595 states and 7130 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 03:38:06,510 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-23 03:38:08,268 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:38:10,611 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:38:18,825 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:38:21,052 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:38:22,763 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:38:24,798 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:38:26,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:38:26,104 INFO L93 Difference]: Finished difference Result 9139 states and 14179 transitions. [2021-11-23 03:38:26,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:38:26,104 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 03:38:26,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:38:26,184 INFO L225 Difference]: With dead ends: 9139 [2021-11-23 03:38:26,184 INFO L226 Difference]: Without dead ends: 9136 [2021-11-23 03:38:26,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:38:26,195 INFO L933 BasicCegarLoop]: 3914 mSDtfsCounter, 2740 mSDsluCounter, 2778 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 1 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2740 SdHoareTripleChecker+Valid, 6406 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:38:26,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2740 Valid, 6406 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 666 Invalid, 4 Unknown, 0 Unchecked, 22.5s Time] [2021-11-23 03:38:26,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9136 states. [2021-11-23 03:38:27,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9136 to 9130. [2021-11-23 03:38:27,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9130 states, 5234 states have (on average 1.3951089033244173) internal successors, (7302), 5484 states have internal predecessors, (7302), 3437 states have call successors, (3437), 459 states have call predecessors, (3437), 458 states have return successors, (3432), 3330 states have call predecessors, (3432), 3428 states have call successors, (3432) [2021-11-23 03:38:27,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9130 states to 9130 states and 14171 transitions. [2021-11-23 03:38:27,142 INFO L78 Accepts]: Start accepts. Automaton has 9130 states and 14171 transitions. Word has length 18 [2021-11-23 03:38:27,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:38:27,142 INFO L470 AbstractCegarLoop]: Abstraction has 9130 states and 14171 transitions. [2021-11-23 03:38:27,142 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 03:38:27,143 INFO L276 IsEmpty]: Start isEmpty. Operand 9130 states and 14171 transitions. [2021-11-23 03:38:27,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 03:38:27,146 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:38:27,146 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 03:38:27,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 03:38:27,146 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:38:27,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:38:27,147 INFO L85 PathProgramCache]: Analyzing trace with hash 192989510, now seen corresponding path program 1 times [2021-11-23 03:38:27,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:38:27,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864644613] [2021-11-23 03:38:27,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:38:27,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:38:27,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:38:27,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:38:27,403 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:38:27,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864644613] [2021-11-23 03:38:27,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864644613] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:38:27,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:38:27,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:38:27,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582598304] [2021-11-23 03:38:27,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:38:27,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:38:27,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:38:27,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:38:27,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:38:27,405 INFO L87 Difference]: Start difference. First operand 9130 states and 14171 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:38:31,930 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:38:33,182 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:38:33,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:38:33,991 INFO L93 Difference]: Finished difference Result 9184 states and 14233 transitions. [2021-11-23 03:38:33,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:38:33,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 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 19 [2021-11-23 03:38:33,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:38:34,150 INFO L225 Difference]: With dead ends: 9184 [2021-11-23 03:38:34,151 INFO L226 Difference]: Without dead ends: 9181 [2021-11-23 03:38:34,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:38:34,161 INFO L933 BasicCegarLoop]: 2656 mSDtfsCounter, 2774 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 338 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2776 SdHoareTripleChecker+Valid, 3148 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 338 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:38:34,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2776 Valid, 3148 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 338 Invalid, 1 Unknown, 0 Unchecked, 6.4s Time] [2021-11-23 03:38:34,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9181 states. [2021-11-23 03:38:34,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9181 to 9129. [2021-11-23 03:38:34,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9129 states, 5234 states have (on average 1.3949178448605273) internal successors, (7301), 5483 states have internal predecessors, (7301), 3436 states have call successors, (3436), 459 states have call predecessors, (3436), 458 states have return successors, (3432), 3330 states have call predecessors, (3432), 3428 states have call successors, (3432) [2021-11-23 03:38:34,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9129 states to 9129 states and 14169 transitions. [2021-11-23 03:38:34,981 INFO L78 Accepts]: Start accepts. Automaton has 9129 states and 14169 transitions. Word has length 19 [2021-11-23 03:38:34,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:38:34,981 INFO L470 AbstractCegarLoop]: Abstraction has 9129 states and 14169 transitions. [2021-11-23 03:38:34,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 2 states have internal predecessors, (18), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:38:34,983 INFO L276 IsEmpty]: Start isEmpty. Operand 9129 states and 14169 transitions. [2021-11-23 03:38:34,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 03:38:34,984 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:38:34,985 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:38:34,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 03:38:34,985 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:38:34,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:38:34,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1774351773, now seen corresponding path program 1 times [2021-11-23 03:38:34,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:38:34,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341963812] [2021-11-23 03:38:34,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:38:34,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:38:35,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:38:35,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:38:35,219 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:38:35,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341963812] [2021-11-23 03:38:35,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341963812] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:38:35,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:38:35,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:38:35,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026779339] [2021-11-23 03:38:35,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:38:35,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:38:35,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:38:35,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:38:35,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:38:35,222 INFO L87 Difference]: Start difference. First operand 9129 states and 14169 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 1 states have call successors, (2), 1 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 03:38:39,236 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:38:45,437 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:38:47,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:38:47,055 INFO L93 Difference]: Finished difference Result 22797 states and 35392 transitions. [2021-11-23 03:38:47,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:38:47,055 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 1 states have call successors, (2), 1 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 21 [2021-11-23 03:38:47,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:38:47,124 INFO L225 Difference]: With dead ends: 22797 [2021-11-23 03:38:47,124 INFO L226 Difference]: Without dead ends: 13669 [2021-11-23 03:38:47,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:38:47,192 INFO L933 BasicCegarLoop]: 3175 mSDtfsCounter, 2514 mSDsluCounter, 2770 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2514 SdHoareTripleChecker+Valid, 5662 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:38:47,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2514 Valid, 5662 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 11.4s Time] [2021-11-23 03:38:47,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13669 states. [2021-11-23 03:38:48,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13669 to 13647. [2021-11-23 03:38:48,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13647 states, 7727 states have (on average 1.3917432379966352) internal successors, (10754), 8108 states have internal predecessors, (10754), 5223 states have call successors, (5223), 697 states have call predecessors, (5223), 696 states have return successors, (5219), 5069 states have call predecessors, (5219), 5215 states have call successors, (5219) [2021-11-23 03:38:48,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13647 states to 13647 states and 21196 transitions. [2021-11-23 03:38:48,510 INFO L78 Accepts]: Start accepts. Automaton has 13647 states and 21196 transitions. Word has length 21 [2021-11-23 03:38:48,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:38:48,511 INFO L470 AbstractCegarLoop]: Abstraction has 13647 states and 21196 transitions. [2021-11-23 03:38:48,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 1 states have call successors, (2), 1 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 03:38:48,511 INFO L276 IsEmpty]: Start isEmpty. Operand 13647 states and 21196 transitions. [2021-11-23 03:38:48,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 03:38:48,515 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:38:48,515 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:38:48,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 03:38:48,516 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:38:48,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:38:48,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1686608475, now seen corresponding path program 1 times [2021-11-23 03:38:48,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:38:48,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501190778] [2021-11-23 03:38:48,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:38:48,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:38:48,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:38:48,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:38:48,769 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:38:48,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501190778] [2021-11-23 03:38:48,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501190778] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:38:48,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:38:48,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:38:48,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521806377] [2021-11-23 03:38:48,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:38:48,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:38:48,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:38:48,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:38:48,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:38:48,771 INFO L87 Difference]: Start difference. First operand 13647 states and 21196 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:38:51,051 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:38:53,618 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:38:55,417 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:38:55,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:38:55,796 INFO L93 Difference]: Finished difference Result 13663 states and 21204 transitions. [2021-11-23 03:38:55,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:38:55,796 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-23 03:38:55,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:38:55,865 INFO L225 Difference]: With dead ends: 13663 [2021-11-23 03:38:55,865 INFO L226 Difference]: Without dead ends: 13659 [2021-11-23 03:38:55,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:38:55,879 INFO L933 BasicCegarLoop]: 2497 mSDtfsCounter, 2762 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2762 SdHoareTripleChecker+Valid, 2501 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-11-23 03:38:55,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2762 Valid, 2501 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2021-11-23 03:38:55,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13659 states. [2021-11-23 03:38:57,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13659 to 13657. [2021-11-23 03:38:57,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13657 states, 7733 states have (on average 1.3900168110694426) internal successors, (10749), 8112 states have internal predecessors, (10749), 5221 states have call successors, (5221), 703 states have call predecessors, (5221), 702 states have return successors, (5219), 5069 states have call predecessors, (5219), 5215 states have call successors, (5219) [2021-11-23 03:38:57,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13657 states to 13657 states and 21189 transitions. [2021-11-23 03:38:57,228 INFO L78 Accepts]: Start accepts. Automaton has 13657 states and 21189 transitions. Word has length 20 [2021-11-23 03:38:57,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:38:57,228 INFO L470 AbstractCegarLoop]: Abstraction has 13657 states and 21189 transitions. [2021-11-23 03:38:57,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:38:57,229 INFO L276 IsEmpty]: Start isEmpty. Operand 13657 states and 21189 transitions. [2021-11-23 03:38:57,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 03:38:57,231 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:38:57,231 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:38:57,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 03:38:57,232 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:38:57,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:38:57,233 INFO L85 PathProgramCache]: Analyzing trace with hash 744161001, now seen corresponding path program 1 times [2021-11-23 03:38:57,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:38:57,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913476535] [2021-11-23 03:38:57,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:38:57,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:38:57,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:38:57,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:38:57,447 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:38:57,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913476535] [2021-11-23 03:38:57,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913476535] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:38:57,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:38:57,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:38:57,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831582400] [2021-11-23 03:38:57,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:38:57,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:38:57,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:38:57,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:38:57,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:38:57,449 INFO L87 Difference]: Start difference. First operand 13657 states and 21189 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:39:02,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:39:02,176 INFO L93 Difference]: Finished difference Result 27993 states and 43220 transitions. [2021-11-23 03:39:02,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:39:02,177 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 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 21 [2021-11-23 03:39:02,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:39:02,247 INFO L225 Difference]: With dead ends: 27993 [2021-11-23 03:39:02,247 INFO L226 Difference]: Without dead ends: 14337 [2021-11-23 03:39:02,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:39:02,329 INFO L933 BasicCegarLoop]: 2543 mSDtfsCounter, 2655 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2655 SdHoareTripleChecker+Valid, 2750 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:39:02,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2655 Valid, 2750 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2021-11-23 03:39:02,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14337 states. [2021-11-23 03:39:03,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14337 to 14298. [2021-11-23 03:39:03,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14298 states, 8065 states have (on average 1.3775573465592064) internal successors, (11110), 8448 states have internal predecessors, (11110), 5364 states have call successors, (5364), 858 states have call predecessors, (5364), 868 states have return successors, (5399), 5225 states have call predecessors, (5399), 5355 states have call successors, (5399) [2021-11-23 03:39:03,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14298 states to 14298 states and 21873 transitions. [2021-11-23 03:39:03,707 INFO L78 Accepts]: Start accepts. Automaton has 14298 states and 21873 transitions. Word has length 21 [2021-11-23 03:39:03,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:39:03,708 INFO L470 AbstractCegarLoop]: Abstraction has 14298 states and 21873 transitions. [2021-11-23 03:39:03,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:39:03,709 INFO L276 IsEmpty]: Start isEmpty. Operand 14298 states and 21873 transitions. [2021-11-23 03:39:03,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 03:39:03,711 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:39:03,712 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:39:03,712 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 03:39:03,712 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:39:03,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:39:03,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1593065246, now seen corresponding path program 1 times [2021-11-23 03:39:03,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:39:03,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310841480] [2021-11-23 03:39:03,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:39:03,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:39:03,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:39:03,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:39:03,916 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:39:03,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310841480] [2021-11-23 03:39:03,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310841480] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:39:03,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:39:03,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:39:03,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913388265] [2021-11-23 03:39:03,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:39:03,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:39:03,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:39:03,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:39:03,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:39:03,919 INFO L87 Difference]: Start difference. First operand 14298 states and 21873 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:39:08,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:39:08,822 INFO L93 Difference]: Finished difference Result 14300 states and 21874 transitions. [2021-11-23 03:39:08,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:39:08,823 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-23 03:39:08,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:39:08,888 INFO L225 Difference]: With dead ends: 14300 [2021-11-23 03:39:08,888 INFO L226 Difference]: Without dead ends: 14289 [2021-11-23 03:39:08,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:39:08,899 INFO L933 BasicCegarLoop]: 2495 mSDtfsCounter, 2764 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2764 SdHoareTripleChecker+Valid, 2495 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:39:08,900 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2764 Valid, 2495 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-11-23 03:39:08,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14289 states. [2021-11-23 03:39:09,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14289 to 14289. [2021-11-23 03:39:09,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14289 states, 8057 states have (on average 1.3774357701377684) internal successors, (11098), 8439 states have internal predecessors, (11098), 5363 states have call successors, (5363), 858 states have call predecessors, (5363), 868 states have return successors, (5399), 5225 states have call predecessors, (5399), 5355 states have call successors, (5399) [2021-11-23 03:39:10,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14289 states to 14289 states and 21860 transitions. [2021-11-23 03:39:10,010 INFO L78 Accepts]: Start accepts. Automaton has 14289 states and 21860 transitions. Word has length 22 [2021-11-23 03:39:10,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:39:10,011 INFO L470 AbstractCegarLoop]: Abstraction has 14289 states and 21860 transitions. [2021-11-23 03:39:10,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:39:10,011 INFO L276 IsEmpty]: Start isEmpty. Operand 14289 states and 21860 transitions. [2021-11-23 03:39:10,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-23 03:39:10,025 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:39:10,025 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:39:10,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 03:39:10,026 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:39:10,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:39:10,026 INFO L85 PathProgramCache]: Analyzing trace with hash 995686616, now seen corresponding path program 1 times [2021-11-23 03:39:10,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:39:10,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261675391] [2021-11-23 03:39:10,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:39:10,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:39:10,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:39:10,223 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:39:10,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261675391] [2021-11-23 03:39:10,224 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2021-11-23 03:39:10,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910103326] [2021-11-23 03:39:10,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:39:10,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:39:10,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8769721-b810-45e9-99f0-23abad4a68ed/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:39:10,232 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8769721-b810-45e9-99f0-23abad4a68ed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:39:10,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8769721-b810-45e9-99f0-23abad4a68ed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 03:39:11,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:39:11,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 4474 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 03:39:11,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:39:11,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:39:11,794 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:39:11,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910103326] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:39:11,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:39:11,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:39:11,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448646491] [2021-11-23 03:39:11,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:39:11,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:39:11,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:39:11,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:39:11,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:39:11,796 INFO L87 Difference]: Start difference. First operand 14289 states and 21860 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 2 states have internal predecessors, (42), 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 03:39:23,143 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:39:25,058 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:39:25,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:39:25,834 INFO L93 Difference]: Finished difference Result 37159 states and 56907 transitions. [2021-11-23 03:39:25,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:39:25,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 2 states have internal predecessors, (42), 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 45 [2021-11-23 03:39:25,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:39:25,928 INFO L225 Difference]: With dead ends: 37159 [2021-11-23 03:39:25,929 INFO L226 Difference]: Without dead ends: 22871 [2021-11-23 03:39:26,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:39:26,004 INFO L933 BasicCegarLoop]: 3528 mSDtfsCounter, 2719 mSDsluCounter, 2770 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2719 SdHoareTripleChecker+Valid, 6014 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:39:26,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2719 Valid, 6014 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 13.2s Time] [2021-11-23 03:39:26,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22871 states. [2021-11-23 03:39:27,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22871 to 22849. [2021-11-23 03:39:27,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22849 states, 12799 states have (on average 1.3743261192280647) internal successors, (17590), 13402 states have internal predecessors, (17590), 8688 states have call successors, (8688), 1345 states have call predecessors, (8688), 1361 states have return successors, (8744), 8485 states have call predecessors, (8744), 8680 states have call successors, (8744) [2021-11-23 03:39:27,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22849 states to 22849 states and 35022 transitions. [2021-11-23 03:39:27,645 INFO L78 Accepts]: Start accepts. Automaton has 22849 states and 35022 transitions. Word has length 45 [2021-11-23 03:39:27,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:39:27,645 INFO L470 AbstractCegarLoop]: Abstraction has 22849 states and 35022 transitions. [2021-11-23 03:39:27,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 2 states have internal predecessors, (42), 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 03:39:27,645 INFO L276 IsEmpty]: Start isEmpty. Operand 22849 states and 35022 transitions. [2021-11-23 03:39:27,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-23 03:39:27,655 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:39:27,655 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, 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 03:39:27,715 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8769721-b810-45e9-99f0-23abad4a68ed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-23 03:39:27,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8769721-b810-45e9-99f0-23abad4a68ed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 03:39:27,872 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:39:27,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:39:27,872 INFO L85 PathProgramCache]: Analyzing trace with hash 2104392341, now seen corresponding path program 1 times [2021-11-23 03:39:27,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:39:27,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540531039] [2021-11-23 03:39:27,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:39:27,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:39:27,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:39:28,119 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 03:39:28,120 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:39:28,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540531039] [2021-11-23 03:39:28,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540531039] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:39:28,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:39:28,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:39:28,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856659319] [2021-11-23 03:39:28,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:39:28,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:39:28,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:39:28,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:39:28,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:39:28,124 INFO L87 Difference]: Start difference. First operand 22849 states and 35022 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-23 03:39:32,572 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:39:41,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:39:41,566 INFO L93 Difference]: Finished difference Result 64905 states and 99625 transitions. [2021-11-23 03:39:41,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:39:41,566 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 59 [2021-11-23 03:39:41,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:39:41,734 INFO L225 Difference]: With dead ends: 64905 [2021-11-23 03:39:41,734 INFO L226 Difference]: Without dead ends: 42057 [2021-11-23 03:39:41,829 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 03:39:41,830 INFO L933 BasicCegarLoop]: 3487 mSDtfsCounter, 2704 mSDsluCounter, 2771 mSDsCounter, 0 mSdLazyCounter, 666 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2707 SdHoareTripleChecker+Valid, 5973 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 666 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:39:41,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2707 Valid, 5973 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 666 Invalid, 1 Unknown, 0 Unchecked, 11.5s Time] [2021-11-23 03:39:41,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42057 states. [2021-11-23 03:39:44,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42057 to 39400. [2021-11-23 03:39:44,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39400 states, 22237 states have (on average 1.3815262850204615) internal successors, (30721), 23284 states have internal predecessors, (30721), 14772 states have call successors, (14772), 2358 states have call predecessors, (14772), 2390 states have return successors, (14908), 14417 states have call predecessors, (14908), 14764 states have call successors, (14908) [2021-11-23 03:39:45,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39400 states to 39400 states and 60401 transitions. [2021-11-23 03:39:45,280 INFO L78 Accepts]: Start accepts. Automaton has 39400 states and 60401 transitions. Word has length 59 [2021-11-23 03:39:45,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:39:45,281 INFO L470 AbstractCegarLoop]: Abstraction has 39400 states and 60401 transitions. [2021-11-23 03:39:45,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-23 03:39:45,281 INFO L276 IsEmpty]: Start isEmpty. Operand 39400 states and 60401 transitions. [2021-11-23 03:39:45,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 03:39:45,298 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:39:45,298 INFO L514 BasicCegarLoop]: trace 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:39:45,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 03:39:45,299 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:39:45,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:39:45,299 INFO L85 PathProgramCache]: Analyzing trace with hash -361633195, now seen corresponding path program 1 times [2021-11-23 03:39:45,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:39:45,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507682514] [2021-11-23 03:39:45,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:39:45,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:39:45,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:39:45,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:39:45,549 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:39:45,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507682514] [2021-11-23 03:39:45,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507682514] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:39:45,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:39:45,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:39:45,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121892283] [2021-11-23 03:39:45,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:39:45,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:39:45,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:39:45,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:39:45,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:39:45,552 INFO L87 Difference]: Start difference. First operand 39400 states and 60401 transitions. Second operand has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 03:39:57,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:39:57,927 INFO L93 Difference]: Finished difference Result 116067 states and 177957 transitions. [2021-11-23 03:39:57,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:39:57,927 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 54 [2021-11-23 03:39:57,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:39:58,403 INFO L225 Difference]: With dead ends: 116067 [2021-11-23 03:39:58,404 INFO L226 Difference]: Without dead ends: 76668 [2021-11-23 03:39:58,571 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 03:39:58,572 INFO L933 BasicCegarLoop]: 3631 mSDtfsCounter, 2741 mSDsluCounter, 2765 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2741 SdHoareTripleChecker+Valid, 6111 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:39:58,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2741 Valid, 6111 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2021-11-23 03:39:58,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76668 states. [2021-11-23 03:40:04,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76668 to 76646. [2021-11-23 03:40:04,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76646 states, 43199 states have (on average 1.3805180675478599) internal successors, (59637), 45238 states have internal predecessors, (59637), 28805 states have call successors, (28805), 4555 states have call predecessors, (28805), 4641 states have return successors, (29077), 28144 states have call predecessors, (29077), 28797 states have call successors, (29077) [2021-11-23 03:40:04,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76646 states to 76646 states and 117519 transitions. [2021-11-23 03:40:04,766 INFO L78 Accepts]: Start accepts. Automaton has 76646 states and 117519 transitions. Word has length 54 [2021-11-23 03:40:04,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:04,767 INFO L470 AbstractCegarLoop]: Abstraction has 76646 states and 117519 transitions. [2021-11-23 03:40:04,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.333333333333334) internal successors, (37), 3 states have internal predecessors, (37), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 03:40:04,768 INFO L276 IsEmpty]: Start isEmpty. Operand 76646 states and 117519 transitions. [2021-11-23 03:40:04,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-23 03:40:04,786 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:04,787 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:40:04,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 03:40:04,787 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:40:04,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:04,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1859014767, now seen corresponding path program 1 times [2021-11-23 03:40:04,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:04,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380462448] [2021-11-23 03:40:04,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:04,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:04,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:05,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 03:40:05,330 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:05,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380462448] [2021-11-23 03:40:05,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380462448] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:40:05,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:40:05,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 03:40:05,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508081511] [2021-11-23 03:40:05,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:40:05,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:40:05,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:05,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:40:05,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:40:05,332 INFO L87 Difference]: Start difference. First operand 76646 states and 117519 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (6), 3 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 03:40:14,073 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:40:18,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:18,521 INFO L93 Difference]: Finished difference Result 82377 states and 124672 transitions. [2021-11-23 03:40:18,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:40:18,522 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (6), 3 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 51 [2021-11-23 03:40:18,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:18,821 INFO L225 Difference]: With dead ends: 82377 [2021-11-23 03:40:18,821 INFO L226 Difference]: Without dead ends: 76256 [2021-11-23 03:40:18,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:40:18,868 INFO L933 BasicCegarLoop]: 2566 mSDtfsCounter, 229 mSDsluCounter, 2640 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 4927 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:18,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 4927 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 10.4s Time] [2021-11-23 03:40:18,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76256 states. [2021-11-23 03:40:24,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76256 to 76158. [2021-11-23 03:40:24,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76158 states, 42932 states have (on average 1.3813472468089072) internal successors, (59304), 44971 states have internal predecessors, (59304), 28714 states have call successors, (28714), 4513 states have call predecessors, (28714), 4511 states have return successors, (28760), 27965 states have call predecessors, (28760), 28710 states have call successors, (28760) [2021-11-23 03:40:24,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76158 states to 76158 states and 116778 transitions. [2021-11-23 03:40:24,956 INFO L78 Accepts]: Start accepts. Automaton has 76158 states and 116778 transitions. Word has length 51 [2021-11-23 03:40:24,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:24,957 INFO L470 AbstractCegarLoop]: Abstraction has 76158 states and 116778 transitions. [2021-11-23 03:40:24,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (6), 3 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 03:40:24,957 INFO L276 IsEmpty]: Start isEmpty. Operand 76158 states and 116778 transitions. [2021-11-23 03:40:24,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 03:40:24,988 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:24,988 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:40:24,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 03:40:24,989 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:40:24,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:24,989 INFO L85 PathProgramCache]: Analyzing trace with hash -492956432, now seen corresponding path program 1 times [2021-11-23 03:40:24,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:24,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442497890] [2021-11-23 03:40:24,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:24,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:25,111 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-23 03:40:25,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1270541254] [2021-11-23 03:40:25,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:25,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:40:25,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8769721-b810-45e9-99f0-23abad4a68ed/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:40:25,113 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8769721-b810-45e9-99f0-23abad4a68ed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:40:25,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8769721-b810-45e9-99f0-23abad4a68ed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 03:40:26,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:26,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 4516 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:40:26,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:40:26,594 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 03:40:26,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:40:26,594 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:26,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442497890] [2021-11-23 03:40:26,594 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-23 03:40:26,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270541254] [2021-11-23 03:40:26,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270541254] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:40:26,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:40:26,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 03:40:26,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797729211] [2021-11-23 03:40:26,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:40:26,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:40:26,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:26,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:40:26,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:40:26,596 INFO L87 Difference]: Start difference. First operand 76158 states and 116778 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:40:33,272 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 03:40:34,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:40:34,904 INFO L93 Difference]: Finished difference Result 76160 states and 116779 transitions. [2021-11-23 03:40:34,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:40:34,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-11-23 03:40:34,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:40:35,166 INFO L225 Difference]: With dead ends: 76160 [2021-11-23 03:40:35,166 INFO L226 Difference]: Without dead ends: 76153 [2021-11-23 03:40:35,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:40:35,196 INFO L933 BasicCegarLoop]: 2487 mSDtfsCounter, 2736 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2736 SdHoareTripleChecker+Valid, 2487 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:40:35,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2736 Valid, 2487 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-11-23 03:40:35,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76153 states. [2021-11-23 03:40:40,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76153 to 76153. [2021-11-23 03:40:40,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76153 states, 42928 states have (on average 1.3809867685426762) internal successors, (59283), 44966 states have internal predecessors, (59283), 28713 states have call successors, (28713), 4513 states have call predecessors, (28713), 4511 states have return successors, (28760), 27965 states have call predecessors, (28760), 28710 states have call successors, (28760) [2021-11-23 03:40:41,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76153 states to 76153 states and 116756 transitions. [2021-11-23 03:40:41,041 INFO L78 Accepts]: Start accepts. Automaton has 76153 states and 116756 transitions. Word has length 54 [2021-11-23 03:40:41,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:40:41,050 INFO L470 AbstractCegarLoop]: Abstraction has 76153 states and 116756 transitions. [2021-11-23 03:40:41,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 03:40:41,050 INFO L276 IsEmpty]: Start isEmpty. Operand 76153 states and 116756 transitions. [2021-11-23 03:40:41,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-23 03:40:41,133 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:40:41,133 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:40:41,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8769721-b810-45e9-99f0-23abad4a68ed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:40:41,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8769721-b810-45e9-99f0-23abad4a68ed/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-23 03:40:41,355 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:40:41,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:40:41,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1316415905, now seen corresponding path program 1 times [2021-11-23 03:40:41,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:40:41,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575780109] [2021-11-23 03:40:41,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:40:41,356 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:40:41,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:40:41,599 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-23 03:40:41,600 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:40:41,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575780109] [2021-11-23 03:40:41,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575780109] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:40:41,600 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:40:41,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:40:41,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535019350] [2021-11-23 03:40:41,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:40:41,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:40:41,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:40:41,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:40:41,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:40:41,602 INFO L87 Difference]: Start difference. First operand 76153 states and 116756 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 1 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-23 03:40:46,093 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []