./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point_ldv-val-v0.8.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75515ace-87b1-4739-b358-ef3981af1ee7/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75515ace-87b1-4739-b358-ef3981af1ee7/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75515ace-87b1-4739-b358-ef3981af1ee7/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75515ace-87b1-4739-b358-ef3981af1ee7/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point_ldv-val-v0.8.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75515ace-87b1-4739-b358-ef3981af1ee7/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75515ace-87b1-4739-b358-ef3981af1ee7/bin/utaipan-TEXQjIfE4P --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 4b03525ec5447375a01688a728ac5f10add5f84664db60bd75967c00682bdc6d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:01:14,565 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:01:14,568 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:01:14,623 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:01:14,624 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:01:14,629 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:01:14,632 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:01:14,637 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:01:14,640 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:01:14,647 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:01:14,649 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:01:14,651 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:01:14,652 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:01:14,655 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:01:14,658 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:01:14,664 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:01:14,666 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:01:14,667 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:01:14,670 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:01:14,680 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:01:14,682 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:01:14,684 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:01:14,688 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:01:14,689 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:01:14,701 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:01:14,701 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:01:14,702 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:01:14,704 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:01:14,705 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:01:14,707 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:01:14,708 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:01:14,709 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:01:14,711 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:01:14,713 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:01:14,715 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:01:14,715 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:01:14,716 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:01:14,716 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:01:14,716 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:01:14,718 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:01:14,719 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:01:14,720 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75515ace-87b1-4739-b358-ef3981af1ee7/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 00:01:14,772 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:01:14,772 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:01:14,773 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:01:14,773 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:01:14,774 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:01:14,774 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:01:14,774 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:01:14,775 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:01:14,775 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:01:14,775 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:01:14,775 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:01:14,776 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:01:14,776 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:01:14,776 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:01:14,776 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:01:14,777 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:01:14,777 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:01:14,777 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:01:14,778 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:01:14,778 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:01:14,779 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:01:14,779 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:01:14,779 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:01:14,779 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:01:14,780 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:01:14,780 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:01:14,780 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:01:14,781 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:01:14,781 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:01:14,781 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:01:14,781 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:01:14,782 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:01:14,782 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:01:14,782 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:01:14,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:01:14,783 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:01:14,783 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:01:14,783 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:01:14,783 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_75515ace-87b1-4739-b358-ef3981af1ee7/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75515ace-87b1-4739-b358-ef3981af1ee7/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b03525ec5447375a01688a728ac5f10add5f84664db60bd75967c00682bdc6d [2021-11-21 00:01:15,086 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:01:15,115 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:01:15,117 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:01:15,119 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:01:15,119 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:01:15,120 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75515ace-87b1-4739-b358-ef3981af1ee7/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-21 00:01:15,190 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75515ace-87b1-4739-b358-ef3981af1ee7/bin/utaipan-TEXQjIfE4P/data/738dbb2ac/aff9336151d04ad3af34ab6fbd7d0236/FLAG7e8971153 [2021-11-21 00:01:16,153 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:01:16,153 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75515ace-87b1-4739-b358-ef3981af1ee7/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-21 00:01:16,206 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75515ace-87b1-4739-b358-ef3981af1ee7/bin/utaipan-TEXQjIfE4P/data/738dbb2ac/aff9336151d04ad3af34ab6fbd7d0236/FLAG7e8971153 [2021-11-21 00:01:16,538 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75515ace-87b1-4739-b358-ef3981af1ee7/bin/utaipan-TEXQjIfE4P/data/738dbb2ac/aff9336151d04ad3af34ab6fbd7d0236 [2021-11-21 00:01:16,541 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:01:16,544 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:01:16,549 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:01:16,550 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:01:16,554 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:01:16,556 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:01:16" (1/1) ... [2021-11-21 00:01:16,557 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13db801e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:01:16, skipping insertion in model container [2021-11-21 00:01:16,558 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:01:16" (1/1) ... [2021-11-21 00:01:16,566 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:01:16,741 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:01:18,897 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_75515ace-87b1-4739-b358-ef3981af1ee7/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point_ldv-val-v0.8.cil.out.i[212825,212838] [2021-11-21 00:01:19,034 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:01:19,069 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:01:19,494 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_75515ace-87b1-4739-b358-ef3981af1ee7/sv-benchmarks/c/ldv-validator-v0.8/linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point_ldv-val-v0.8.cil.out.i[212825,212838] [2021-11-21 00:01:19,518 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:01:19,661 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:01:19,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:01:19 WrapperNode [2021-11-21 00:01:19,662 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:01:19,663 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:01:19,663 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:01:19,663 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:01:19,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:01:19" (1/1) ... [2021-11-21 00:01:19,834 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:01:19" (1/1) ... [2021-11-21 00:01:20,002 INFO L137 Inliner]: procedures = 272, calls = 2460, calls flagged for inlining = 116, calls inlined = 95, statements flattened = 3935 [2021-11-21 00:01:20,002 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:01:20,003 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:01:20,004 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:01:20,004 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:01:20,015 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:01:19" (1/1) ... [2021-11-21 00:01:20,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:01:19" (1/1) ... [2021-11-21 00:01:20,049 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:01:19" (1/1) ... [2021-11-21 00:01:20,050 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:01:19" (1/1) ... [2021-11-21 00:01:20,190 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:01:19" (1/1) ... [2021-11-21 00:01:20,232 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:01:19" (1/1) ... [2021-11-21 00:01:20,255 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:01:19" (1/1) ... [2021-11-21 00:01:20,277 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:01:20,278 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:01:20,278 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:01:20,278 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:01:20,279 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:01:19" (1/1) ... [2021-11-21 00:01:20,287 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:01:20,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75515ace-87b1-4739-b358-ef3981af1ee7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:01:20,314 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75515ace-87b1-4739-b358-ef3981af1ee7/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:01:20,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75515ace-87b1-4739-b358-ef3981af1ee7/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:01:20,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2021-11-21 00:01:20,414 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2021-11-21 00:01:20,419 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_intfdata [2021-11-21 00:01:20,419 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_intfdata [2021-11-21 00:01:20,420 INFO L130 BoogieDeclarations]: Found specification of procedure usb_submit_urb [2021-11-21 00:01:20,420 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_submit_urb [2021-11-21 00:01:20,425 INFO L130 BoogieDeclarations]: Found specification of procedure __xchg_wrong_size [2021-11-21 00:01:20,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-21 00:01:20,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-21 00:01:20,425 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-21 00:01:20,426 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-21 00:01:20,426 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-21 00:01:20,426 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-21 00:01:20,426 INFO L130 BoogieDeclarations]: Found specification of procedure usb_get_dev [2021-11-21 00:01:20,426 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_get_dev [2021-11-21 00:01:20,427 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-11-21 00:01:20,427 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-11-21 00:01:20,427 INFO L130 BoogieDeclarations]: Found specification of procedure usb_make_path [2021-11-21 00:01:20,427 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_make_path [2021-11-21 00:01:20,427 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-21 00:01:20,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-21 00:01:20,428 INFO L130 BoogieDeclarations]: Found specification of procedure send_packet [2021-11-21 00:01:20,428 INFO L138 BoogieDeclarations]: Found implementation of procedure send_packet [2021-11-21 00:01:20,428 INFO L130 BoogieDeclarations]: Found specification of procedure strlcat [2021-11-21 00:01:20,428 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcat [2021-11-21 00:01:20,428 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-21 00:01:20,429 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-21 00:01:20,429 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-21 00:01:20,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-21 00:01:20,429 INFO L130 BoogieDeclarations]: Found specification of procedure imon_disconnect [2021-11-21 00:01:20,429 INFO L138 BoogieDeclarations]: Found implementation of procedure imon_disconnect [2021-11-21 00:01:20,429 INFO L130 BoogieDeclarations]: Found specification of procedure usb_deregister_dev [2021-11-21 00:01:20,430 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_deregister_dev [2021-11-21 00:01:20,430 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_lock_of_imon_context [2021-11-21 00:01:20,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_lock_of_imon_context [2021-11-21 00:01:20,430 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 00:01:20,430 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 00:01:20,431 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-11-21 00:01:20,431 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-11-21 00:01:20,431 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-21 00:01:20,431 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-21 00:01:20,431 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_driver_lock [2021-11-21 00:01:20,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_driver_lock [2021-11-21 00:01:20,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:01:20,432 INFO L130 BoogieDeclarations]: Found specification of procedure input_event [2021-11-21 00:01:20,432 INFO L138 BoogieDeclarations]: Found implementation of procedure input_event [2021-11-21 00:01:20,432 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 00:01:20,433 INFO L130 BoogieDeclarations]: Found specification of procedure input_allocate_device [2021-11-21 00:01:20,433 INFO L138 BoogieDeclarations]: Found implementation of procedure input_allocate_device [2021-11-21 00:01:20,434 INFO L130 BoogieDeclarations]: Found specification of procedure dev_set_drvdata [2021-11-21 00:01:20,435 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_set_drvdata [2021-11-21 00:01:20,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:01:20,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 00:01:20,436 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-21 00:01:20,436 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-21 00:01:20,436 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-21 00:01:20,436 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-21 00:01:20,437 INFO L130 BoogieDeclarations]: Found specification of procedure usb_set_intfdata [2021-11-21 00:01:20,437 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_set_intfdata [2021-11-21 00:01:20,438 INFO L130 BoogieDeclarations]: Found specification of procedure input_set_drvdata [2021-11-21 00:01:20,439 INFO L138 BoogieDeclarations]: Found implementation of procedure input_set_drvdata [2021-11-21 00:01:20,439 INFO L130 BoogieDeclarations]: Found specification of procedure input_report_key [2021-11-21 00:01:20,439 INFO L138 BoogieDeclarations]: Found implementation of procedure input_report_key [2021-11-21 00:01:20,439 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_urb [2021-11-21 00:01:20,439 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_urb [2021-11-21 00:01:20,439 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-21 00:01:20,440 INFO L130 BoogieDeclarations]: Found specification of procedure input_report_abs [2021-11-21 00:01:20,440 INFO L138 BoogieDeclarations]: Found implementation of procedure input_report_abs [2021-11-21 00:01:20,440 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2021-11-21 00:01:20,440 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2021-11-21 00:01:20,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-21 00:01:20,441 INFO L130 BoogieDeclarations]: Found specification of procedure input_free_device [2021-11-21 00:01:20,442 INFO L138 BoogieDeclarations]: Found implementation of procedure input_free_device [2021-11-21 00:01:20,442 INFO L130 BoogieDeclarations]: Found specification of procedure sysfs_create_group [2021-11-21 00:01:20,442 INFO L138 BoogieDeclarations]: Found implementation of procedure sysfs_create_group [2021-11-21 00:01:20,442 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 00:01:20,442 INFO L130 BoogieDeclarations]: Found specification of procedure del_timer_sync [2021-11-21 00:01:20,443 INFO L138 BoogieDeclarations]: Found implementation of procedure del_timer_sync [2021-11-21 00:01:20,443 INFO L130 BoogieDeclarations]: Found specification of procedure sysfs_remove_group [2021-11-21 00:01:20,443 INFO L138 BoogieDeclarations]: Found implementation of procedure sysfs_remove_group [2021-11-21 00:01:20,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-21 00:01:20,443 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-21 00:01:20,443 INFO L130 BoogieDeclarations]: Found specification of procedure lcd_write [2021-11-21 00:01:20,444 INFO L138 BoogieDeclarations]: Found implementation of procedure lcd_write [2021-11-21 00:01:20,445 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-21 00:01:20,445 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-21 00:01:20,445 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-21 00:01:20,445 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-21 00:01:20,445 INFO L130 BoogieDeclarations]: Found specification of procedure usb_fill_int_urb [2021-11-21 00:01:20,446 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_fill_int_urb [2021-11-21 00:01:20,447 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-21 00:01:20,447 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-21 00:01:20,447 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 00:01:20,448 INFO L130 BoogieDeclarations]: Found specification of procedure usb_to_input_id [2021-11-21 00:01:20,448 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_to_input_id [2021-11-21 00:01:20,448 INFO L130 BoogieDeclarations]: Found specification of procedure input_sync [2021-11-21 00:01:20,448 INFO L138 BoogieDeclarations]: Found implementation of procedure input_sync [2021-11-21 00:01:20,449 INFO L130 BoogieDeclarations]: Found specification of procedure noop_llseek [2021-11-21 00:01:20,449 INFO L138 BoogieDeclarations]: Found implementation of procedure noop_llseek [2021-11-21 00:01:20,449 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-21 00:01:20,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-21 00:01:20,449 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-21 00:01:20,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-21 00:01:20,450 INFO L130 BoogieDeclarations]: Found specification of procedure free_imon_context [2021-11-21 00:01:20,450 INFO L138 BoogieDeclarations]: Found implementation of procedure free_imon_context [2021-11-21 00:01:20,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 00:01:20,451 INFO L130 BoogieDeclarations]: Found specification of procedure disable_suitable_timer_1 [2021-11-21 00:01:20,451 INFO L138 BoogieDeclarations]: Found implementation of procedure disable_suitable_timer_1 [2021-11-21 00:01:20,451 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-21 00:01:20,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-21 00:01:20,452 INFO L130 BoogieDeclarations]: Found specification of procedure input_register_device [2021-11-21 00:01:20,453 INFO L138 BoogieDeclarations]: Found implementation of procedure input_register_device [2021-11-21 00:01:20,456 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_lock_of_imon_context [2021-11-21 00:01:20,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_lock_of_imon_context [2021-11-21 00:01:20,456 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2021-11-21 00:01:20,456 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2021-11-21 00:01:20,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:01:20,459 INFO L130 BoogieDeclarations]: Found specification of procedure vfd_write [2021-11-21 00:01:20,459 INFO L138 BoogieDeclarations]: Found implementation of procedure vfd_write [2021-11-21 00:01:20,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 00:01:20,460 INFO L130 BoogieDeclarations]: Found specification of procedure input_set_abs_params [2021-11-21 00:01:20,465 INFO L138 BoogieDeclarations]: Found implementation of procedure input_set_abs_params [2021-11-21 00:01:20,466 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-21 00:01:20,466 INFO L130 BoogieDeclarations]: Found specification of procedure reg_timer_1 [2021-11-21 00:01:20,466 INFO L138 BoogieDeclarations]: Found implementation of procedure reg_timer_1 [2021-11-21 00:01:20,466 INFO L130 BoogieDeclarations]: Found specification of procedure display_close [2021-11-21 00:01:20,466 INFO L138 BoogieDeclarations]: Found implementation of procedure display_close [2021-11-21 00:01:20,467 INFO L130 BoogieDeclarations]: Found specification of procedure usb_register_dev [2021-11-21 00:01:20,467 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_register_dev [2021-11-21 00:01:20,467 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_urb [2021-11-21 00:01:20,467 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_urb [2021-11-21 00:01:20,467 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_driver_lock [2021-11-21 00:01:20,467 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_driver_lock [2021-11-21 00:01:20,468 INFO L130 BoogieDeclarations]: Found specification of procedure input_unregister_device [2021-11-21 00:01:20,468 INFO L138 BoogieDeclarations]: Found implementation of procedure input_unregister_device [2021-11-21 00:01:20,468 INFO L130 BoogieDeclarations]: Found specification of procedure imon_find_endpoints [2021-11-21 00:01:20,468 INFO L138 BoogieDeclarations]: Found implementation of procedure imon_find_endpoints [2021-11-21 00:01:20,468 INFO L130 BoogieDeclarations]: Found specification of procedure display_open [2021-11-21 00:01:20,468 INFO L138 BoogieDeclarations]: Found implementation of procedure display_open [2021-11-21 00:01:20,469 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:01:20,469 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2021-11-21 00:01:20,469 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2021-11-21 00:01:20,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:01:20,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:01:21,258 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:01:21,263 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:01:21,838 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-21 00:01:27,920 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:01:28,791 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:01:28,791 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-21 00:01:28,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:01:28 BoogieIcfgContainer [2021-11-21 00:01:28,796 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:01:28,798 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:01:28,799 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:01:28,802 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:01:28,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:01:16" (1/3) ... [2021-11-21 00:01:28,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9f99538 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:01:28, skipping insertion in model container [2021-11-21 00:01:28,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:01:19" (2/3) ... [2021-11-21 00:01:28,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9f99538 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:01:28, skipping insertion in model container [2021-11-21 00:01:28,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:01:28" (3/3) ... [2021-11-21 00:01:28,806 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-a9e7fb5-1-32_7a-drivers--media--rc--imon.ko-entry_point_ldv-val-v0.8.cil.out.i [2021-11-21 00:01:28,812 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:01:28,812 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:01:28,874 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:01:28,881 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 [2021-11-21 00:01:28,882 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:01:28,978 INFO L276 IsEmpty]: Start isEmpty. Operand has 878 states, 533 states have (on average 1.3358348968105065) internal successors, (712), 555 states have internal predecessors, (712), 281 states have call successors, (281), 63 states have call predecessors, (281), 62 states have return successors, (274), 273 states have call predecessors, (274), 274 states have call successors, (274) [2021-11-21 00:01:29,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-21 00:01:29,005 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:01:29,007 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:01:29,007 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:01:29,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:01:29,014 INFO L85 PathProgramCache]: Analyzing trace with hash -805164949, now seen corresponding path program 1 times [2021-11-21 00:01:29,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:01:29,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165725289] [2021-11-21 00:01:29,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:29,027 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:01:29,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:30,168 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2021-11-21 00:01:30,169 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:01:30,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165725289] [2021-11-21 00:01:30,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165725289] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:01:30,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:01:30,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:01:30,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753416072] [2021-11-21 00:01:30,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:01:30,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:01:30,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:01:30,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:01:30,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:01:30,222 INFO L87 Difference]: Start difference. First operand has 878 states, 533 states have (on average 1.3358348968105065) internal successors, (712), 555 states have internal predecessors, (712), 281 states have call successors, (281), 63 states have call predecessors, (281), 62 states have return successors, (274), 273 states have call predecessors, (274), 274 states have call successors, (274) Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2021-11-21 00:01:32,314 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:01:35,006 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:01:38,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:01:38,100 INFO L93 Difference]: Finished difference Result 2489 states and 3683 transitions. [2021-11-21 00:01:38,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:01:38,112 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), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 167 [2021-11-21 00:01:38,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:01:38,149 INFO L225 Difference]: With dead ends: 2489 [2021-11-21 00:01:38,149 INFO L226 Difference]: Without dead ends: 1632 [2021-11-21 00:01:38,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:01:38,168 INFO L933 BasicCegarLoop]: 1409 mSDtfsCounter, 1095 mSDsluCounter, 1237 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1095 SdHoareTripleChecker+Valid, 2520 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:01:38,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1095 Valid, 2520 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 286 Invalid, 2 Unknown, 0 Unchecked, 7.6s Time] [2021-11-21 00:01:38,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1632 states. [2021-11-21 00:01:38,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1632 to 1618. [2021-11-21 00:01:38,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1618 states, 992 states have (on average 1.3175403225806452) internal successors, (1307), 1013 states have internal predecessors, (1307), 505 states have call successors, (505), 121 states have call predecessors, (505), 120 states have return successors, (498), 495 states have call predecessors, (498), 498 states have call successors, (498) [2021-11-21 00:01:38,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1618 states to 1618 states and 2310 transitions. [2021-11-21 00:01:38,436 INFO L78 Accepts]: Start accepts. Automaton has 1618 states and 2310 transitions. Word has length 167 [2021-11-21 00:01:38,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:01:38,438 INFO L470 AbstractCegarLoop]: Abstraction has 1618 states and 2310 transitions. [2021-11-21 00:01:38,438 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), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2021-11-21 00:01:38,439 INFO L276 IsEmpty]: Start isEmpty. Operand 1618 states and 2310 transitions. [2021-11-21 00:01:38,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-21 00:01:38,444 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:01:38,444 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:01:38,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:01:38,445 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:01:38,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:01:38,446 INFO L85 PathProgramCache]: Analyzing trace with hash -887926802, now seen corresponding path program 1 times [2021-11-21 00:01:38,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:01:38,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306106014] [2021-11-21 00:01:38,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:38,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:01:38,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:38,974 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2021-11-21 00:01:38,974 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:01:38,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306106014] [2021-11-21 00:01:38,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306106014] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:01:38,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:01:38,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:01:38,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127346449] [2021-11-21 00:01:38,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:01:38,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:01:38,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:01:38,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:01:38,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:01:38,986 INFO L87 Difference]: Start difference. First operand 1618 states and 2310 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, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2021-11-21 00:01:41,058 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:01:43,740 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:01:46,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:01:46,171 INFO L93 Difference]: Finished difference Result 3967 states and 5657 transitions. [2021-11-21 00:01:46,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:01:46,182 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, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 168 [2021-11-21 00:01:46,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:01:46,208 INFO L225 Difference]: With dead ends: 3967 [2021-11-21 00:01:46,209 INFO L226 Difference]: Without dead ends: 2389 [2021-11-21 00:01:46,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:01:46,220 INFO L933 BasicCegarLoop]: 1291 mSDtfsCounter, 594 mSDsluCounter, 1218 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 594 SdHoareTripleChecker+Valid, 2388 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:01:46,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [594 Valid, 2388 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 273 Invalid, 2 Unknown, 0 Unchecked, 7.0s Time] [2021-11-21 00:01:46,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2389 states. [2021-11-21 00:01:46,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2389 to 2376. [2021-11-21 00:01:46,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2376 states, 1487 states have (on average 1.335574983187626) internal successors, (1986), 1508 states have internal predecessors, (1986), 705 states have call successors, (705), 184 states have call predecessors, (705), 183 states have return successors, (698), 695 states have call predecessors, (698), 698 states have call successors, (698) [2021-11-21 00:01:46,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2376 states to 2376 states and 3389 transitions. [2021-11-21 00:01:46,396 INFO L78 Accepts]: Start accepts. Automaton has 2376 states and 3389 transitions. Word has length 168 [2021-11-21 00:01:46,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:01:46,397 INFO L470 AbstractCegarLoop]: Abstraction has 2376 states and 3389 transitions. [2021-11-21 00:01:46,397 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, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2021-11-21 00:01:46,398 INFO L276 IsEmpty]: Start isEmpty. Operand 2376 states and 3389 transitions. [2021-11-21 00:01:46,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-21 00:01:46,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:01:46,401 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:01:46,402 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:01:46,402 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:01:46,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:01:46,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1641378617, now seen corresponding path program 1 times [2021-11-21 00:01:46,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:01:46,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918427091] [2021-11-21 00:01:46,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:46,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:01:46,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:46,717 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2021-11-21 00:01:46,718 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:01:46,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918427091] [2021-11-21 00:01:46,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918427091] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:01:46,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:01:46,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:01:46,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588281686] [2021-11-21 00:01:46,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:01:46,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:01:46,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:01:46,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:01:46,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:01:46,722 INFO L87 Difference]: Start difference. First operand 2376 states and 3389 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, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2021-11-21 00:01:48,787 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:01:50,780 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:01:53,560 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:01:55,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:01:55,668 INFO L93 Difference]: Finished difference Result 7007 states and 9989 transitions. [2021-11-21 00:01:55,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:01:55,678 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, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 166 [2021-11-21 00:01:55,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:01:55,724 INFO L225 Difference]: With dead ends: 7007 [2021-11-21 00:01:55,724 INFO L226 Difference]: Without dead ends: 4671 [2021-11-21 00:01:55,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:01:55,740 INFO L933 BasicCegarLoop]: 1354 mSDtfsCounter, 1138 mSDsluCounter, 1227 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1138 SdHoareTripleChecker+Valid, 2456 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:01:55,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1138 Valid, 2456 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 264 Invalid, 2 Unknown, 0 Unchecked, 8.7s Time] [2021-11-21 00:01:55,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4671 states. [2021-11-21 00:01:56,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4671 to 4663. [2021-11-21 00:01:56,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4663 states, 2928 states have (on average 1.3346994535519126) internal successors, (3908), 2963 states have internal predecessors, (3908), 1369 states have call successors, (1369), 366 states have call predecessors, (1369), 365 states have return successors, (1362), 1357 states have call predecessors, (1362), 1362 states have call successors, (1362) [2021-11-21 00:01:56,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4663 states to 4663 states and 6639 transitions. [2021-11-21 00:01:56,068 INFO L78 Accepts]: Start accepts. Automaton has 4663 states and 6639 transitions. Word has length 166 [2021-11-21 00:01:56,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:01:56,070 INFO L470 AbstractCegarLoop]: Abstraction has 4663 states and 6639 transitions. [2021-11-21 00:01:56,070 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, (21), 2 states have call predecessors, (21), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2021-11-21 00:01:56,070 INFO L276 IsEmpty]: Start isEmpty. Operand 4663 states and 6639 transitions. [2021-11-21 00:01:56,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-21 00:01:56,075 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:01:56,076 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:01:56,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 00:01:56,076 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:01:56,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:01:56,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1984820609, now seen corresponding path program 1 times [2021-11-21 00:01:56,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:01:56,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40877043] [2021-11-21 00:01:56,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:01:56,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:01:56,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:01:56,484 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2021-11-21 00:01:56,485 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:01:56,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40877043] [2021-11-21 00:01:56,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40877043] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:01:56,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:01:56,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:01:56,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56774754] [2021-11-21 00:01:56,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:01:56,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:01:56,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:01:56,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:01:56,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:01:56,488 INFO L87 Difference]: Start difference. First operand 4663 states and 6639 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2021-11-21 00:01:58,261 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:02:04,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:02:04,124 INFO L93 Difference]: Finished difference Result 13245 states and 18810 transitions. [2021-11-21 00:02:04,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:02:04,133 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) Word has length 173 [2021-11-21 00:02:04,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:02:04,208 INFO L225 Difference]: With dead ends: 13245 [2021-11-21 00:02:04,208 INFO L226 Difference]: Without dead ends: 8622 [2021-11-21 00:02:04,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:02:04,233 INFO L933 BasicCegarLoop]: 1342 mSDtfsCounter, 1138 mSDsluCounter, 1165 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1138 SdHoareTripleChecker+Valid, 2382 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:02:04,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1138 Valid, 2382 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 273 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2021-11-21 00:02:04,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8622 states. [2021-11-21 00:02:04,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8622 to 8609. [2021-11-21 00:02:04,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8609 states, 5416 states have (on average 1.3316100443131462) internal successors, (7212), 5479 states have internal predecessors, (7212), 2501 states have call successors, (2501), 692 states have call predecessors, (2501), 691 states have return successors, (2494), 2485 states have call predecessors, (2494), 2494 states have call successors, (2494) [2021-11-21 00:02:04,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8609 states to 8609 states and 12207 transitions. [2021-11-21 00:02:04,964 INFO L78 Accepts]: Start accepts. Automaton has 8609 states and 12207 transitions. Word has length 173 [2021-11-21 00:02:04,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:02:04,965 INFO L470 AbstractCegarLoop]: Abstraction has 8609 states and 12207 transitions. [2021-11-21 00:02:04,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (20), 1 states have call predecessors, (20), 1 states have call successors, (20) [2021-11-21 00:02:04,966 INFO L276 IsEmpty]: Start isEmpty. Operand 8609 states and 12207 transitions. [2021-11-21 00:02:04,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-21 00:02:04,971 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:02:04,972 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:02:04,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 00:02:04,972 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:02:04,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:02:04,973 INFO L85 PathProgramCache]: Analyzing trace with hash 996653791, now seen corresponding path program 1 times [2021-11-21 00:02:04,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:02:04,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023921964] [2021-11-21 00:02:04,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:02:04,974 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:02:05,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:02:05,299 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2021-11-21 00:02:05,299 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:02:05,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023921964] [2021-11-21 00:02:05,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023921964] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:02:05,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:02:05,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:02:05,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933233911] [2021-11-21 00:02:05,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:02:05,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:02:05,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:02:05,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:02:05,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:02:05,303 INFO L87 Difference]: Start difference. First operand 8609 states and 12207 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-21 00:02:07,369 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:02:11,244 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:02:13,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:02:13,556 INFO L93 Difference]: Finished difference Result 24967 states and 35238 transitions. [2021-11-21 00:02:13,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:02:13,567 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 179 [2021-11-21 00:02:13,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:02:13,697 INFO L225 Difference]: With dead ends: 24967 [2021-11-21 00:02:13,697 INFO L226 Difference]: Without dead ends: 16406 [2021-11-21 00:02:13,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:02:13,740 INFO L933 BasicCegarLoop]: 1526 mSDtfsCounter, 1086 mSDsluCounter, 1230 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1086 SdHoareTripleChecker+Valid, 2629 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:02:13,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1086 Valid, 2629 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 285 Invalid, 1 Unknown, 0 Unchecked, 7.7s Time] [2021-11-21 00:02:13,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16406 states. [2021-11-21 00:02:14,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16406 to 16391. [2021-11-21 00:02:14,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16391 states, 10250 states have (on average 1.3219512195121952) internal successors, (13550), 10371 states have internal predecessors, (13550), 4761 states have call successors, (4761), 1380 states have call predecessors, (4761), 1379 states have return successors, (4754), 4735 states have call predecessors, (4754), 4754 states have call successors, (4754) [2021-11-21 00:02:14,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16391 states to 16391 states and 23065 transitions. [2021-11-21 00:02:14,751 INFO L78 Accepts]: Start accepts. Automaton has 16391 states and 23065 transitions. Word has length 179 [2021-11-21 00:02:14,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:02:14,754 INFO L470 AbstractCegarLoop]: Abstraction has 16391 states and 23065 transitions. [2021-11-21 00:02:14,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-21 00:02:14,754 INFO L276 IsEmpty]: Start isEmpty. Operand 16391 states and 23065 transitions. [2021-11-21 00:02:14,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-21 00:02:14,757 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:02:14,758 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:02:14,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 00:02:14,758 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:02:14,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:02:14,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1312132585, now seen corresponding path program 1 times [2021-11-21 00:02:14,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:02:14,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436051776] [2021-11-21 00:02:14,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:02:14,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:02:14,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:02:15,248 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2021-11-21 00:02:15,248 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:02:15,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436051776] [2021-11-21 00:02:15,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436051776] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:02:15,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:02:15,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:02:15,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92885718] [2021-11-21 00:02:15,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:02:15,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:02:15,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:02:15,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:02:15,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:02:15,252 INFO L87 Difference]: Start difference. First operand 16391 states and 23065 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-21 00:02:17,323 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:02:20,312 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:02:23,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:02:23,423 INFO L93 Difference]: Finished difference Result 47379 states and 66520 transitions. [2021-11-21 00:02:23,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:02:23,431 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 180 [2021-11-21 00:02:23,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:02:23,584 INFO L225 Difference]: With dead ends: 47379 [2021-11-21 00:02:23,584 INFO L226 Difference]: Without dead ends: 31036 [2021-11-21 00:02:23,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:02:23,651 INFO L933 BasicCegarLoop]: 1617 mSDtfsCounter, 1083 mSDsluCounter, 1229 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1083 SdHoareTripleChecker+Valid, 2720 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:02:23,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1083 Valid, 2720 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 297 Invalid, 2 Unknown, 0 Unchecked, 7.4s Time] [2021-11-21 00:02:23,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31036 states. [2021-11-21 00:02:25,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31036 to 31019. [2021-11-21 00:02:25,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31019 states, 19360 states have (on average 1.3194214876033057) internal successors, (25544), 19597 states have internal predecessors, (25544), 8967 states have call successors, (8967), 2692 states have call predecessors, (8967), 2691 states have return successors, (8960), 8921 states have call predecessors, (8960), 8960 states have call successors, (8960) [2021-11-21 00:02:25,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31019 states to 31019 states and 43471 transitions. [2021-11-21 00:02:25,766 INFO L78 Accepts]: Start accepts. Automaton has 31019 states and 43471 transitions. Word has length 180 [2021-11-21 00:02:25,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:02:25,767 INFO L470 AbstractCegarLoop]: Abstraction has 31019 states and 43471 transitions. [2021-11-21 00:02:25,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-21 00:02:25,768 INFO L276 IsEmpty]: Start isEmpty. Operand 31019 states and 43471 transitions. [2021-11-21 00:02:25,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-11-21 00:02:25,772 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:02:25,773 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:02:25,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 00:02:25,773 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:02:25,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:02:25,774 INFO L85 PathProgramCache]: Analyzing trace with hash 533385216, now seen corresponding path program 1 times [2021-11-21 00:02:25,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:02:25,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899290005] [2021-11-21 00:02:25,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:02:25,775 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:02:25,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:02:26,099 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2021-11-21 00:02:26,100 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:02:26,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899290005] [2021-11-21 00:02:26,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899290005] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:02:26,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:02:26,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:02:26,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054837003] [2021-11-21 00:02:26,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:02:26,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:02:26,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:02:26,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:02:26,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:02:26,104 INFO L87 Difference]: Start difference. First operand 31019 states and 43471 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-21 00:02:28,177 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:02:30,838 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:02:34,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:02:34,310 INFO L93 Difference]: Finished difference Result 49867 states and 69743 transitions. [2021-11-21 00:02:34,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:02:34,320 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 181 [2021-11-21 00:02:34,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:02:34,608 INFO L225 Difference]: With dead ends: 49867 [2021-11-21 00:02:34,609 INFO L226 Difference]: Without dead ends: 49863 [2021-11-21 00:02:34,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:02:34,634 INFO L933 BasicCegarLoop]: 1273 mSDtfsCounter, 740 mSDsluCounter, 1108 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 740 SdHoareTripleChecker+Valid, 2271 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:02:34,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [740 Valid, 2271 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 253 Invalid, 2 Unknown, 0 Unchecked, 7.0s Time] [2021-11-21 00:02:34,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49863 states. [2021-11-21 00:02:37,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49863 to 49859. [2021-11-21 00:02:37,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49859 states, 31648 states have (on average 1.331553336703741) internal successors, (42141), 31996 states have internal predecessors, (42141), 13773 states have call successors, (13773), 4574 states have call predecessors, (13773), 4437 states have return successors, (13766), 13480 states have call predecessors, (13766), 13766 states have call successors, (13766) [2021-11-21 00:02:38,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49859 states to 49859 states and 69680 transitions. [2021-11-21 00:02:38,016 INFO L78 Accepts]: Start accepts. Automaton has 49859 states and 69680 transitions. Word has length 181 [2021-11-21 00:02:38,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:02:38,030 INFO L470 AbstractCegarLoop]: Abstraction has 49859 states and 69680 transitions. [2021-11-21 00:02:38,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-21 00:02:38,031 INFO L276 IsEmpty]: Start isEmpty. Operand 49859 states and 69680 transitions. [2021-11-21 00:02:38,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-21 00:02:38,034 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:02:38,034 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:02:38,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 00:02:38,035 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:02:38,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:02:38,036 INFO L85 PathProgramCache]: Analyzing trace with hash -645328803, now seen corresponding path program 1 times [2021-11-21 00:02:38,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:02:38,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868628595] [2021-11-21 00:02:38,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:02:38,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:02:38,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:02:38,542 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2021-11-21 00:02:38,543 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:02:38,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868628595] [2021-11-21 00:02:38,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868628595] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:02:38,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:02:38,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:02:38,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254100707] [2021-11-21 00:02:38,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:02:38,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:02:38,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:02:38,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:02:38,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:02:38,546 INFO L87 Difference]: Start difference. First operand 49859 states and 69680 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-21 00:02:40,619 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:02:42,632 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:02:44,044 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:02:48,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:02:48,234 INFO L93 Difference]: Finished difference Result 116395 states and 161384 transitions. [2021-11-21 00:02:48,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:02:48,241 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 182 [2021-11-21 00:02:48,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:02:48,723 INFO L225 Difference]: With dead ends: 116395 [2021-11-21 00:02:48,723 INFO L226 Difference]: Without dead ends: 66584 [2021-11-21 00:02:49,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:02:49,128 INFO L933 BasicCegarLoop]: 1266 mSDtfsCounter, 716 mSDsluCounter, 1038 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 716 SdHoareTripleChecker+Valid, 2193 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:02:49,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [716 Valid, 2193 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 256 Invalid, 1 Unknown, 0 Unchecked, 7.6s Time] [2021-11-21 00:02:49,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66584 states. [2021-11-21 00:02:51,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66584 to 66082. [2021-11-21 00:02:52,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66082 states, 42106 states have (on average 1.3274830190471667) internal successors, (55895), 42857 states have internal predecessors, (55895), 17391 states have call successors, (17391), 6870 states have call predecessors, (17391), 6584 states have return successors, (17638), 16610 states have call predecessors, (17638), 17382 states have call successors, (17638) [2021-11-21 00:02:52,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66082 states to 66082 states and 90924 transitions. [2021-11-21 00:02:52,878 INFO L78 Accepts]: Start accepts. Automaton has 66082 states and 90924 transitions. Word has length 182 [2021-11-21 00:02:52,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:02:52,880 INFO L470 AbstractCegarLoop]: Abstraction has 66082 states and 90924 transitions. [2021-11-21 00:02:52,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-21 00:02:52,881 INFO L276 IsEmpty]: Start isEmpty. Operand 66082 states and 90924 transitions. [2021-11-21 00:02:52,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-21 00:02:52,884 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:02:52,884 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:02:52,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 00:02:52,885 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:02:52,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:02:52,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1469247139, now seen corresponding path program 1 times [2021-11-21 00:02:52,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:02:52,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229888616] [2021-11-21 00:02:52,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:02:52,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:02:53,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:02:53,184 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 558 trivial. 0 not checked. [2021-11-21 00:02:53,185 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:02:53,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229888616] [2021-11-21 00:02:53,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229888616] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:02:53,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:02:53,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:02:53,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14722496] [2021-11-21 00:02:53,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:02:53,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:02:53,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:02:53,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:02:53,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:02:53,190 INFO L87 Difference]: Start difference. First operand 66082 states and 90924 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-21 00:02:55,262 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:02:57,461 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:03:00,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:03:00,362 INFO L93 Difference]: Finished difference Result 66084 states and 90925 transitions. [2021-11-21 00:03:00,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:03:00,372 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) Word has length 183 [2021-11-21 00:03:00,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:03:00,883 INFO L225 Difference]: With dead ends: 66084 [2021-11-21 00:03:00,883 INFO L226 Difference]: Without dead ends: 66077 [2021-11-21 00:03:00,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:03:00,912 INFO L933 BasicCegarLoop]: 1110 mSDtfsCounter, 1186 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1186 SdHoareTripleChecker+Valid, 1110 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:03:00,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1186 Valid, 1110 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 128 Invalid, 1 Unknown, 0 Unchecked, 5.2s Time] [2021-11-21 00:03:00,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66077 states. [2021-11-21 00:03:03,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66077 to 66077. [2021-11-21 00:03:03,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66077 states, 42102 states have (on average 1.326302788466106) internal successors, (55840), 42852 states have internal predecessors, (55840), 17390 states have call successors, (17390), 6870 states have call predecessors, (17390), 6584 states have return successors, (17638), 16610 states have call predecessors, (17638), 17382 states have call successors, (17638) [2021-11-21 00:03:04,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66077 states to 66077 states and 90868 transitions. [2021-11-21 00:03:04,278 INFO L78 Accepts]: Start accepts. Automaton has 66077 states and 90868 transitions. Word has length 183 [2021-11-21 00:03:04,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:03:04,279 INFO L470 AbstractCegarLoop]: Abstraction has 66077 states and 90868 transitions. [2021-11-21 00:03:04,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (21), 2 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-21 00:03:04,279 INFO L276 IsEmpty]: Start isEmpty. Operand 66077 states and 90868 transitions. [2021-11-21 00:03:04,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-11-21 00:03:04,287 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:03:04,288 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:03:04,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 00:03:04,289 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:03:04,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:03:04,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1007303163, now seen corresponding path program 1 times [2021-11-21 00:03:04,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:03:04,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852807330] [2021-11-21 00:03:04,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:03:04,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:03:04,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:03:04,646 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 562 trivial. 0 not checked. [2021-11-21 00:03:04,646 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:03:04,647 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852807330] [2021-11-21 00:03:04,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852807330] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:03:04,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:03:04,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:03:04,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515322733] [2021-11-21 00:03:04,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:03:04,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:03:04,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:03:04,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:03:04,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:03:04,650 INFO L87 Difference]: Start difference. First operand 66077 states and 90868 transitions. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-21 00:03:06,730 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:03:09,174 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:03:10,263 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:03:14,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:03:14,014 INFO L93 Difference]: Finished difference Result 99746 states and 137127 transitions. [2021-11-21 00:03:14,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:03:14,025 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) Word has length 246 [2021-11-21 00:03:14,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:03:14,146 INFO L225 Difference]: With dead ends: 99746 [2021-11-21 00:03:14,147 INFO L226 Difference]: Without dead ends: 33701 [2021-11-21 00:03:14,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:03:14,286 INFO L933 BasicCegarLoop]: 1115 mSDtfsCounter, 8 mSDsluCounter, 1232 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 2220 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:03:14,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 2220 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 259 Invalid, 1 Unknown, 0 Unchecked, 7.6s Time] [2021-11-21 00:03:14,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33701 states. [2021-11-21 00:03:15,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33701 to 33350. [2021-11-21 00:03:15,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33350 states, 21217 states have (on average 1.3292642692180798) internal successors, (28203), 21605 states have internal predecessors, (28203), 8786 states have call successors, (8786), 3490 states have call predecessors, (8786), 3346 states have return successors, (8906), 8382 states have call predecessors, (8906), 8778 states have call successors, (8906) [2021-11-21 00:03:15,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33350 states to 33350 states and 45895 transitions. [2021-11-21 00:03:15,953 INFO L78 Accepts]: Start accepts. Automaton has 33350 states and 45895 transitions. Word has length 246 [2021-11-21 00:03:15,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:03:15,955 INFO L470 AbstractCegarLoop]: Abstraction has 33350 states and 45895 transitions. [2021-11-21 00:03:15,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 2 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-21 00:03:15,955 INFO L276 IsEmpty]: Start isEmpty. Operand 33350 states and 45895 transitions. [2021-11-21 00:03:15,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2021-11-21 00:03:15,968 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:03:15,969 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 9, 9, 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, 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] [2021-11-21 00:03:15,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 00:03:15,969 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:03:15,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:03:15,970 INFO L85 PathProgramCache]: Analyzing trace with hash 395793516, now seen corresponding path program 1 times [2021-11-21 00:03:15,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:03:15,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144912319] [2021-11-21 00:03:15,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:03:15,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:03:16,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:03:16,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1640 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2021-11-21 00:03:16,333 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:03:16,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144912319] [2021-11-21 00:03:16,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144912319] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:03:16,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:03:16,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:03:16,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799784926] [2021-11-21 00:03:16,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:03:16,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:03:16,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:03:16,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:03:16,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:03:16,337 INFO L87 Difference]: Start difference. First operand 33350 states and 45895 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-21 00:03:18,102 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:03:20,169 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:03:22,249 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:03:25,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:03:25,330 INFO L93 Difference]: Finished difference Result 66608 states and 91665 transitions. [2021-11-21 00:03:25,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:03:25,341 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) Word has length 297 [2021-11-21 00:03:25,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:03:25,442 INFO L225 Difference]: With dead ends: 66608 [2021-11-21 00:03:25,443 INFO L226 Difference]: Without dead ends: 33353 [2021-11-21 00:03:25,528 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 [2021-11-21 00:03:25,529 INFO L933 BasicCegarLoop]: 1549 mSDtfsCounter, 1022 mSDsluCounter, 751 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1022 SdHoareTripleChecker+Valid, 2225 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:03:25,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1022 Valid, 2225 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 259 Invalid, 1 Unknown, 0 Unchecked, 7.8s Time] [2021-11-21 00:03:25,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33353 states. [2021-11-21 00:03:26,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33353 to 32980. [2021-11-21 00:03:27,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32980 states, 21058 states have (on average 1.3260993446671099) internal successors, (27925), 21337 states have internal predecessors, (27925), 8590 states have call successors, (8590), 3418 states have call predecessors, (8590), 3331 states have return successors, (8539), 8352 states have call predecessors, (8539), 8539 states have call successors, (8539) [2021-11-21 00:03:27,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32980 states to 32980 states and 45054 transitions. [2021-11-21 00:03:27,122 INFO L78 Accepts]: Start accepts. Automaton has 32980 states and 45054 transitions. Word has length 297 [2021-11-21 00:03:27,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:03:27,122 INFO L470 AbstractCegarLoop]: Abstraction has 32980 states and 45054 transitions. [2021-11-21 00:03:27,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (31), 2 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-21 00:03:27,123 INFO L276 IsEmpty]: Start isEmpty. Operand 32980 states and 45054 transitions. [2021-11-21 00:03:27,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2021-11-21 00:03:27,142 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:03:27,143 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 9, 9, 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, 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:03:27,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-21 00:03:27,144 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:03:27,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:03:27,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1622102671, now seen corresponding path program 1 times [2021-11-21 00:03:27,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:03:27,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098437671] [2021-11-21 00:03:27,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:03:27,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:03:27,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:03:27,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1643 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1643 trivial. 0 not checked. [2021-11-21 00:03:27,453 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:03:27,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098437671] [2021-11-21 00:03:27,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098437671] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:03:27,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:03:27,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:03:27,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114803896] [2021-11-21 00:03:27,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:03:27,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:03:27,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:03:27,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:03:27,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:03:27,456 INFO L87 Difference]: Start difference. First operand 32980 states and 45054 transitions. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-21 00:03:29,527 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:03:32,264 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:03:35,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:03:35,285 INFO L93 Difference]: Finished difference Result 35002 states and 47189 transitions. [2021-11-21 00:03:35,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:03:35,286 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 311 [2021-11-21 00:03:35,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:03:35,455 INFO L225 Difference]: With dead ends: 35002 [2021-11-21 00:03:35,456 INFO L226 Difference]: Without dead ends: 34999 [2021-11-21 00:03:35,476 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 [2021-11-21 00:03:35,477 INFO L933 BasicCegarLoop]: 1192 mSDtfsCounter, 561 mSDsluCounter, 783 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 561 SdHoareTripleChecker+Valid, 1901 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2021-11-21 00:03:35,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [561 Valid, 1901 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 232 Invalid, 2 Unknown, 0 Unchecked, 6.8s Time] [2021-11-21 00:03:35,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34999 states. [2021-11-21 00:03:36,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34999 to 34991. [2021-11-21 00:03:36,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34991 states, 22244 states have (on average 1.314511778457112) internal successors, (29240), 22522 states have internal predecessors, (29240), 8967 states have call successors, (8967), 3866 states have call predecessors, (8967), 3779 states have return successors, (8917), 8730 states have call predecessors, (8917), 8917 states have call successors, (8917) [2021-11-21 00:03:37,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34991 states to 34991 states and 47124 transitions. [2021-11-21 00:03:37,010 INFO L78 Accepts]: Start accepts. Automaton has 34991 states and 47124 transitions. Word has length 311 [2021-11-21 00:03:37,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:03:37,011 INFO L470 AbstractCegarLoop]: Abstraction has 34991 states and 47124 transitions. [2021-11-21 00:03:37,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 3 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-21 00:03:37,011 INFO L276 IsEmpty]: Start isEmpty. Operand 34991 states and 47124 transitions. [2021-11-21 00:03:37,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2021-11-21 00:03:37,077 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:03:37,078 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 9, 9, 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, 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, 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] [2021-11-21 00:03:37,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-21 00:03:37,079 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:03:37,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:03:37,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1303313840, now seen corresponding path program 1 times [2021-11-21 00:03:37,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:03:37,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451600525] [2021-11-21 00:03:37,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:03:37,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:03:37,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:03:37,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1649 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1643 trivial. 0 not checked. [2021-11-21 00:03:37,435 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:03:37,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451600525] [2021-11-21 00:03:37,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451600525] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:03:37,436 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:03:37,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:03:37,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821881820] [2021-11-21 00:03:37,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:03:37,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:03:37,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:03:37,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:03:37,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:03:37,439 INFO L87 Difference]: Start difference. First operand 34991 states and 47124 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-21 00:03:39,659 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:03:43,520 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:03:47,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:03:47,828 INFO L93 Difference]: Finished difference Result 84451 states and 117509 transitions. [2021-11-21 00:03:47,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:03:47,837 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 337 [2021-11-21 00:03:47,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:03:48,004 INFO L225 Difference]: With dead ends: 84451 [2021-11-21 00:03:48,004 INFO L226 Difference]: Without dead ends: 49555 [2021-11-21 00:03:48,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:03:48,074 INFO L933 BasicCegarLoop]: 1733 mSDtfsCounter, 388 mSDsluCounter, 1375 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 2980 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:03:48,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [533 Valid, 2980 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 304 Invalid, 2 Unknown, 0 Unchecked, 8.7s Time] [2021-11-21 00:03:48,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49555 states. [2021-11-21 00:03:49,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49555 to 35023. [2021-11-21 00:03:49,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35023 states, 22276 states have (on average 1.3140599748608368) internal successors, (29272), 22554 states have internal predecessors, (29272), 8967 states have call successors, (8967), 3866 states have call predecessors, (8967), 3779 states have return successors, (8917), 8730 states have call predecessors, (8917), 8917 states have call successors, (8917) [2021-11-21 00:03:49,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35023 states to 35023 states and 47156 transitions. [2021-11-21 00:03:49,723 INFO L78 Accepts]: Start accepts. Automaton has 35023 states and 47156 transitions. Word has length 337 [2021-11-21 00:03:49,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:03:49,724 INFO L470 AbstractCegarLoop]: Abstraction has 35023 states and 47156 transitions. [2021-11-21 00:03:49,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 2 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-21 00:03:49,725 INFO L276 IsEmpty]: Start isEmpty. Operand 35023 states and 47156 transitions. [2021-11-21 00:03:50,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2021-11-21 00:03:50,077 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:03:50,093 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 9, 9, 4, 4, 4, 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, 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, 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] [2021-11-21 00:03:50,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-21 00:03:50,094 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:03:50,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:03:50,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1709369296, now seen corresponding path program 1 times [2021-11-21 00:03:50,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:03:50,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395976912] [2021-11-21 00:03:50,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:03:50,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:03:50,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:03:50,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1665 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1665 trivial. 0 not checked. [2021-11-21 00:03:50,622 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:03:50,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395976912] [2021-11-21 00:03:50,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395976912] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:03:50,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:03:50,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:03:50,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119382768] [2021-11-21 00:03:50,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:03:50,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:03:50,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:03:50,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:03:50,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:03:50,626 INFO L87 Difference]: Start difference. First operand 35023 states and 47156 transitions. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) [2021-11-21 00:03:52,694 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:03:55,689 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:03:59,953 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:04:03,066 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:04:05,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:04:05,357 INFO L93 Difference]: Finished difference Result 94473 states and 133711 transitions. [2021-11-21 00:04:05,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:04:05,365 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) Word has length 355 [2021-11-21 00:04:05,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:04:05,639 INFO L225 Difference]: With dead ends: 94473 [2021-11-21 00:04:05,639 INFO L226 Difference]: Without dead ends: 59545 [2021-11-21 00:04:05,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:04:05,751 INFO L933 BasicCegarLoop]: 1727 mSDtfsCounter, 956 mSDsluCounter, 2891 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 212 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1101 SdHoareTripleChecker+Valid, 4346 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:04:05,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1101 Valid, 4346 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 467 Invalid, 2 Unknown, 0 Unchecked, 12.4s Time] [2021-11-21 00:04:05,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59545 states. [2021-11-21 00:04:07,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59545 to 35055. [2021-11-21 00:04:07,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35055 states, 22308 states have (on average 1.312892235969159) internal successors, (29288), 22586 states have internal predecessors, (29288), 8967 states have call successors, (8967), 3866 states have call predecessors, (8967), 3779 states have return successors, (8917), 8730 states have call predecessors, (8917), 8917 states have call successors, (8917) [2021-11-21 00:04:08,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35055 states to 35055 states and 47172 transitions. [2021-11-21 00:04:08,070 INFO L78 Accepts]: Start accepts. Automaton has 35055 states and 47172 transitions. Word has length 355 [2021-11-21 00:04:08,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:04:08,071 INFO L470 AbstractCegarLoop]: Abstraction has 35055 states and 47172 transitions. [2021-11-21 00:04:08,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 2 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (43), 2 states have call predecessors, (43), 2 states have call successors, (43) [2021-11-21 00:04:08,072 INFO L276 IsEmpty]: Start isEmpty. Operand 35055 states and 47172 transitions. [2021-11-21 00:04:08,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2021-11-21 00:04:08,137 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:04:08,138 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 9, 9, 4, 4, 4, 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, 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, 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] [2021-11-21 00:04:08,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-21 00:04:08,138 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:04:08,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:04:08,139 INFO L85 PathProgramCache]: Analyzing trace with hash -490414861, now seen corresponding path program 1 times [2021-11-21 00:04:08,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:04:08,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810840867] [2021-11-21 00:04:08,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:04:08,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:04:08,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:04:08,797 INFO L134 CoverageAnalysis]: Checked inductivity of 1665 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1665 trivial. 0 not checked. [2021-11-21 00:04:08,797 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:04:08,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810840867] [2021-11-21 00:04:08,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810840867] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:04:08,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:04:08,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:04:08,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074238158] [2021-11-21 00:04:08,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:04:08,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:04:08,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:04:08,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:04:08,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:04:08,801 INFO L87 Difference]: Start difference. First operand 35055 states and 47172 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) [2021-11-21 00:04:10,873 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:04:13,111 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:04:14,124 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:04:18,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:04:18,625 INFO L93 Difference]: Finished difference Result 81270 states and 112388 transitions. [2021-11-21 00:04:18,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:04:18,626 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) Word has length 359 [2021-11-21 00:04:18,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:04:18,765 INFO L225 Difference]: With dead ends: 81270 [2021-11-21 00:04:18,766 INFO L226 Difference]: Without dead ends: 46310 [2021-11-21 00:04:18,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:04:18,832 INFO L933 BasicCegarLoop]: 1494 mSDtfsCounter, 341 mSDsluCounter, 1189 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 2568 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2021-11-21 00:04:18,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [454 Valid, 2568 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 274 Invalid, 1 Unknown, 0 Unchecked, 7.9s Time] [2021-11-21 00:04:18,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46310 states. [2021-11-21 00:04:20,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46310 to 35087. [2021-11-21 00:04:20,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35087 states, 22324 states have (on average 1.3119512632144776) internal successors, (29288), 22602 states have internal predecessors, (29288), 8983 states have call successors, (8983), 3866 states have call predecessors, (8983), 3779 states have return successors, (8933), 8746 states have call predecessors, (8933), 8933 states have call successors, (8933) [2021-11-21 00:04:20,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35087 states to 35087 states and 47204 transitions. [2021-11-21 00:04:20,836 INFO L78 Accepts]: Start accepts. Automaton has 35087 states and 47204 transitions. Word has length 359 [2021-11-21 00:04:20,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:04:20,836 INFO L470 AbstractCegarLoop]: Abstraction has 35087 states and 47204 transitions. [2021-11-21 00:04:20,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 3 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) [2021-11-21 00:04:20,837 INFO L276 IsEmpty]: Start isEmpty. Operand 35087 states and 47204 transitions. [2021-11-21 00:04:20,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2021-11-21 00:04:20,885 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:04:20,886 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 9, 9, 4, 4, 4, 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, 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, 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] [2021-11-21 00:04:20,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-21 00:04:20,887 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:04:20,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:04:20,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1362908178, now seen corresponding path program 1 times [2021-11-21 00:04:20,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:04:20,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314644701] [2021-11-21 00:04:20,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:04:20,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:04:21,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:04:21,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1665 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1665 trivial. 0 not checked. [2021-11-21 00:04:21,348 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:04:21,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314644701] [2021-11-21 00:04:21,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314644701] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:04:21,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:04:21,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:04:21,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955580682] [2021-11-21 00:04:21,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:04:21,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:04:21,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:04:21,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:04:21,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:04:21,351 INFO L87 Difference]: Start difference. First operand 35087 states and 47204 transitions. Second operand has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) [2021-11-21 00:04:23,959 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:04:26,022 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:04:29,275 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:04:30,360 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:04:32,163 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:04:39,176 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:04:41,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:04:41,040 INFO L93 Difference]: Finished difference Result 93651 states and 132339 transitions. [2021-11-21 00:04:41,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:04:41,041 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) Word has length 362 [2021-11-21 00:04:41,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:04:41,230 INFO L225 Difference]: With dead ends: 93651 [2021-11-21 00:04:41,231 INFO L226 Difference]: Without dead ends: 58659 [2021-11-21 00:04:41,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-21 00:04:41,309 INFO L933 BasicCegarLoop]: 1695 mSDtfsCounter, 938 mSDsluCounter, 2873 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 192 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1083 SdHoareTripleChecker+Valid, 4294 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.9s IncrementalHoareTripleChecker+Time [2021-11-21 00:04:41,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1083 Valid, 4294 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 463 Invalid, 3 Unknown, 0 Unchecked, 16.9s Time] [2021-11-21 00:04:41,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58659 states. [2021-11-21 00:04:43,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58659 to 34820. [2021-11-21 00:04:43,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34820 states, 22189 states have (on average 1.3116409031502096) internal successors, (29104), 22451 states have internal predecessors, (29104), 8900 states have call successors, (8900), 3817 states have call predecessors, (8900), 3730 states have return successors, (8851), 8679 states have call predecessors, (8851), 8851 states have call successors, (8851) [2021-11-21 00:04:43,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34820 states to 34820 states and 46855 transitions. [2021-11-21 00:04:43,569 INFO L78 Accepts]: Start accepts. Automaton has 34820 states and 46855 transitions. Word has length 362 [2021-11-21 00:04:43,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:04:43,570 INFO L470 AbstractCegarLoop]: Abstraction has 34820 states and 46855 transitions. [2021-11-21 00:04:43,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.0) internal successors, (92), 4 states have internal predecessors, (92), 2 states have call successors, (46), 2 states have call predecessors, (46), 1 states have return successors, (44), 2 states have call predecessors, (44), 2 states have call successors, (44) [2021-11-21 00:04:43,570 INFO L276 IsEmpty]: Start isEmpty. Operand 34820 states and 46855 transitions. [2021-11-21 00:04:43,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2021-11-21 00:04:43,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:04:43,610 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 9, 9, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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] [2021-11-21 00:04:43,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-21 00:04:43,611 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:04:43,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:04:43,612 INFO L85 PathProgramCache]: Analyzing trace with hash 898988199, now seen corresponding path program 1 times [2021-11-21 00:04:43,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:04:43,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306622123] [2021-11-21 00:04:43,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:04:43,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:04:43,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:04:44,336 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 1645 trivial. 0 not checked. [2021-11-21 00:04:44,336 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:04:44,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306622123] [2021-11-21 00:04:44,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306622123] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:04:44,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:04:44,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:04:44,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779695145] [2021-11-21 00:04:44,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:04:44,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:04:44,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:04:44,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:04:44,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:04:44,340 INFO L87 Difference]: Start difference. First operand 34820 states and 46855 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-21 00:04:46,413 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:04:52,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:04:52,660 INFO L93 Difference]: Finished difference Result 82052 states and 110330 transitions. [2021-11-21 00:04:52,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:04:52,670 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) Word has length 362 [2021-11-21 00:04:52,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:04:52,826 INFO L225 Difference]: With dead ends: 82052 [2021-11-21 00:04:52,826 INFO L226 Difference]: Without dead ends: 47327 [2021-11-21 00:04:52,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:04:52,897 INFO L933 BasicCegarLoop]: 1275 mSDtfsCounter, 977 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 2006 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:04:52,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [977 Valid, 2006 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 226 Invalid, 1 Unknown, 0 Unchecked, 6.3s Time] [2021-11-21 00:04:52,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47327 states. [2021-11-21 00:04:55,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47327 to 47252. [2021-11-21 00:04:55,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47252 states, 30583 states have (on average 1.3177255337932838) internal successors, (40300), 30845 states have internal predecessors, (40300), 11493 states have call successors, (11493), 5290 states have call predecessors, (11493), 5175 states have return successors, (11444), 11244 states have call predecessors, (11444), 11444 states have call successors, (11444) [2021-11-21 00:04:55,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47252 states to 47252 states and 63237 transitions. [2021-11-21 00:04:55,457 INFO L78 Accepts]: Start accepts. Automaton has 47252 states and 63237 transitions. Word has length 362 [2021-11-21 00:04:55,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:04:55,458 INFO L470 AbstractCegarLoop]: Abstraction has 47252 states and 63237 transitions. [2021-11-21 00:04:55,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-21 00:04:55,458 INFO L276 IsEmpty]: Start isEmpty. Operand 47252 states and 63237 transitions. [2021-11-21 00:04:55,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2021-11-21 00:04:55,486 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:04:55,487 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 9, 9, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:04:55,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-21 00:04:55,487 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:04:55,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:04:55,488 INFO L85 PathProgramCache]: Analyzing trace with hash 979472320, now seen corresponding path program 1 times [2021-11-21 00:04:55,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:04:55,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817740405] [2021-11-21 00:04:55,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:04:55,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:04:55,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:04:55,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1659 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1659 trivial. 0 not checked. [2021-11-21 00:04:55,897 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:04:55,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817740405] [2021-11-21 00:04:55,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817740405] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:04:55,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:04:55,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:04:55,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398540397] [2021-11-21 00:04:55,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:04:55,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:04:55,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:04:55,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:04:55,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:04:55,901 INFO L87 Difference]: Start difference. First operand 47252 states and 63237 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-21 00:04:57,974 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:05:03,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:05:03,425 INFO L93 Difference]: Finished difference Result 47259 states and 63242 transitions. [2021-11-21 00:05:03,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:05:03,425 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) Word has length 360 [2021-11-21 00:05:03,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:05:03,560 INFO L225 Difference]: With dead ends: 47259 [2021-11-21 00:05:03,560 INFO L226 Difference]: Without dead ends: 47252 [2021-11-21 00:05:03,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:05:03,576 INFO L933 BasicCegarLoop]: 1128 mSDtfsCounter, 684 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 684 SdHoareTripleChecker+Valid, 1617 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:05:03,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [684 Valid, 1617 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 212 Invalid, 1 Unknown, 0 Unchecked, 5.7s Time] [2021-11-21 00:05:03,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47252 states. [2021-11-21 00:05:05,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47252 to 46943. [2021-11-21 00:05:05,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46943 states, 30424 states have (on average 1.316066263476203) internal successors, (40040), 30648 states have internal predecessors, (40040), 11343 states have call successors, (11343), 5194 states have call predecessors, (11343), 5175 states have return successors, (11296), 11228 states have call predecessors, (11296), 11296 states have call successors, (11296) [2021-11-21 00:05:06,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46943 states to 46943 states and 62679 transitions. [2021-11-21 00:05:06,108 INFO L78 Accepts]: Start accepts. Automaton has 46943 states and 62679 transitions. Word has length 360 [2021-11-21 00:05:06,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:05:06,109 INFO L470 AbstractCegarLoop]: Abstraction has 46943 states and 62679 transitions. [2021-11-21 00:05:06,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-21 00:05:06,109 INFO L276 IsEmpty]: Start isEmpty. Operand 46943 states and 62679 transitions. [2021-11-21 00:05:06,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 416 [2021-11-21 00:05:06,163 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:05:06,164 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 9, 9, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:05:06,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-21 00:05:06,164 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:05:06,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:05:06,165 INFO L85 PathProgramCache]: Analyzing trace with hash 613600582, now seen corresponding path program 1 times [2021-11-21 00:05:06,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:05:06,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774193805] [2021-11-21 00:05:06,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:05:06,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:05:06,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:05:06,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1695 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 1681 trivial. 0 not checked. [2021-11-21 00:05:06,764 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:05:06,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774193805] [2021-11-21 00:05:06,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774193805] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:05:06,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398001451] [2021-11-21 00:05:06,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:05:06,765 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:05:06,766 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75515ace-87b1-4739-b358-ef3981af1ee7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:05:06,769 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75515ace-87b1-4739-b358-ef3981af1ee7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:05:06,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75515ace-87b1-4739-b358-ef3981af1ee7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:05:09,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:05:09,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 5608 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-21 00:05:09,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:05:10,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1695 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1689 trivial. 0 not checked. [2021-11-21 00:05:10,153 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:05:10,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398001451] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:05:10,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:05:10,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-21 00:05:10,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041795326] [2021-11-21 00:05:10,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:05:10,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:05:10,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:05:10,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:05:10,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:05:10,157 INFO L87 Difference]: Start difference. First operand 46943 states and 62679 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (54), 2 states have call predecessors, (54), 2 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) [2021-11-21 00:05:12,228 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:05:13,570 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:05:18,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:05:18,795 INFO L93 Difference]: Finished difference Result 93967 states and 125551 transitions. [2021-11-21 00:05:18,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:05:18,803 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (54), 2 states have call predecessors, (54), 2 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) Word has length 415 [2021-11-21 00:05:19,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:05:19,234 INFO L225 Difference]: With dead ends: 93967 [2021-11-21 00:05:19,234 INFO L226 Difference]: Without dead ends: 47119 [2021-11-21 00:05:19,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 422 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:05:19,315 INFO L933 BasicCegarLoop]: 1106 mSDtfsCounter, 11 mSDsluCounter, 1219 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 2202 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:05:19,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 2202 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 262 Invalid, 1 Unknown, 0 Unchecked, 6.6s Time] [2021-11-21 00:05:19,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47119 states. [2021-11-21 00:05:21,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47119 to 47055. [2021-11-21 00:05:21,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47055 states, 30520 states have (on average 1.3166448230668415) internal successors, (40184), 30744 states have internal predecessors, (40184), 11359 states have call successors, (11359), 5194 states have call predecessors, (11359), 5175 states have return successors, (11312), 11244 states have call predecessors, (11312), 11312 states have call successors, (11312) [2021-11-21 00:05:21,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47055 states to 47055 states and 62855 transitions. [2021-11-21 00:05:21,764 INFO L78 Accepts]: Start accepts. Automaton has 47055 states and 62855 transitions. Word has length 415 [2021-11-21 00:05:21,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:05:21,765 INFO L470 AbstractCegarLoop]: Abstraction has 47055 states and 62855 transitions. [2021-11-21 00:05:21,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 3 states have internal predecessors, (121), 2 states have call successors, (54), 2 states have call predecessors, (54), 2 states have return successors, (51), 2 states have call predecessors, (51), 2 states have call successors, (51) [2021-11-21 00:05:21,765 INFO L276 IsEmpty]: Start isEmpty. Operand 47055 states and 62855 transitions. [2021-11-21 00:05:21,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-11-21 00:05:21,818 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:05:21,818 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 9, 9, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:05:21,857 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75515ace-87b1-4739-b358-ef3981af1ee7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:05:22,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75515ace-87b1-4739-b358-ef3981af1ee7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:05:22,020 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:05:22,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:05:22,020 INFO L85 PathProgramCache]: Analyzing trace with hash -699583690, now seen corresponding path program 1 times [2021-11-21 00:05:22,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:05:22,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367401737] [2021-11-21 00:05:22,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:05:22,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:05:22,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:05:22,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1697 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 1683 trivial. 0 not checked. [2021-11-21 00:05:22,874 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:05:22,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367401737] [2021-11-21 00:05:22,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367401737] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:05:22,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548130360] [2021-11-21 00:05:22,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:05:22,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:05:22,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75515ace-87b1-4739-b358-ef3981af1ee7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:05:22,882 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75515ace-87b1-4739-b358-ef3981af1ee7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:05:22,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75515ace-87b1-4739-b358-ef3981af1ee7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:05:24,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:05:24,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 5645 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-21 00:05:24,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:05:25,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1697 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1691 trivial. 0 not checked. [2021-11-21 00:05:25,419 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:05:25,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548130360] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:05:25,420 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:05:25,420 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [7] total 13 [2021-11-21 00:05:25,420 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788494159] [2021-11-21 00:05:25,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:05:25,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-21 00:05:25,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:05:25,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-21 00:05:25,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-11-21 00:05:25,423 INFO L87 Difference]: Start difference. First operand 47055 states and 62855 transitions. Second operand has 8 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 3 states have call successors, (55), 2 states have call predecessors, (55), 3 states have return successors, (52), 4 states have call predecessors, (52), 3 states have call successors, (52) [2021-11-21 00:05:27,492 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:05:30,082 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:05:50,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:05:50,622 INFO L93 Difference]: Finished difference Result 137817 states and 195518 transitions. [2021-11-21 00:05:50,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 00:05:50,623 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 3 states have call successors, (55), 2 states have call predecessors, (55), 3 states have return successors, (52), 4 states have call predecessors, (52), 3 states have call successors, (52) Word has length 419 [2021-11-21 00:05:50,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:05:50,932 INFO L225 Difference]: With dead ends: 137817 [2021-11-21 00:05:50,932 INFO L226 Difference]: Without dead ends: 90857 [2021-11-21 00:05:51,031 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 416 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-11-21 00:05:51,032 INFO L933 BasicCegarLoop]: 2632 mSDtfsCounter, 892 mSDsluCounter, 12610 mSDsCounter, 0 mSdLazyCounter, 1325 mSolverCounterSat, 242 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1159 SdHoareTripleChecker+Valid, 14256 SdHoareTripleChecker+Invalid, 1569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 1325 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:05:51,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1159 Valid, 14256 Invalid, 1569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 1325 Invalid, 2 Unknown, 0 Unchecked, 20.2s Time] [2021-11-21 00:05:51,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90857 states. [2021-11-21 00:05:53,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90857 to 47471. [2021-11-21 00:05:53,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47471 states, 30856 states have (on average 1.317863624578688) internal successors, (40664), 31080 states have internal predecessors, (40664), 11423 states have call successors, (11423), 5194 states have call predecessors, (11423), 5191 states have return successors, (11408), 11324 states have call predecessors, (11408), 11376 states have call successors, (11408) [2021-11-21 00:05:54,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47471 states to 47471 states and 63495 transitions. [2021-11-21 00:05:54,052 INFO L78 Accepts]: Start accepts. Automaton has 47471 states and 63495 transitions. Word has length 419 [2021-11-21 00:05:54,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:05:54,053 INFO L470 AbstractCegarLoop]: Abstraction has 47471 states and 63495 transitions. [2021-11-21 00:05:54,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 3 states have call successors, (55), 2 states have call predecessors, (55), 3 states have return successors, (52), 4 states have call predecessors, (52), 3 states have call successors, (52) [2021-11-21 00:05:54,053 INFO L276 IsEmpty]: Start isEmpty. Operand 47471 states and 63495 transitions. [2021-11-21 00:05:54,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2021-11-21 00:05:54,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:05:54,109 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 9, 9, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:05:54,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75515ace-87b1-4739-b358-ef3981af1ee7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:05:54,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75515ace-87b1-4739-b358-ef3981af1ee7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:05:54,311 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:05:54,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:05:54,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1839591542, now seen corresponding path program 1 times [2021-11-21 00:05:54,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:05:54,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577339946] [2021-11-21 00:05:54,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:05:54,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:05:54,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:05:54,747 INFO L134 CoverageAnalysis]: Checked inductivity of 1702 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 1688 trivial. 0 not checked. [2021-11-21 00:05:54,748 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:05:54,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577339946] [2021-11-21 00:05:54,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577339946] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:05:54,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576788207] [2021-11-21 00:05:54,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:05:54,748 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:05:54,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75515ace-87b1-4739-b358-ef3981af1ee7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:05:54,754 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75515ace-87b1-4739-b358-ef3981af1ee7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:05:54,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75515ace-87b1-4739-b358-ef3981af1ee7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:05:56,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:05:56,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 5697 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-21 00:05:56,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:05:57,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1702 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 1664 trivial. 0 not checked. [2021-11-21 00:05:57,195 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:05:57,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576788207] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:05:57,196 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:05:57,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 7 [2021-11-21 00:05:57,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321933166] [2021-11-21 00:05:57,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:05:57,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:05:57,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:05:57,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:05:57,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:05:57,198 INFO L87 Difference]: Start difference. First operand 47471 states and 63495 transitions. Second operand has 7 states, 6 states have (on average 22.5) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (57), 2 states have call predecessors, (57), 4 states have return successors, (54), 4 states have call predecessors, (54), 2 states have call successors, (54) [2021-11-21 00:05:59,247 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:06:02,795 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:06:03,810 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:06:06,790 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:06:08,825 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:06:14,168 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:06:16,290 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:06:18,964 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:06:28,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:06:28,695 INFO L93 Difference]: Finished difference Result 113911 states and 157385 transitions. [2021-11-21 00:06:28,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-21 00:06:28,696 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 22.5) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (57), 2 states have call predecessors, (57), 4 states have return successors, (54), 4 states have call predecessors, (54), 2 states have call successors, (54) Word has length 426 [2021-11-21 00:06:28,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:06:29,071 INFO L225 Difference]: With dead ends: 113911 [2021-11-21 00:06:29,071 INFO L226 Difference]: Without dead ends: 66535 [2021-11-21 00:06:29,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 428 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:06:29,152 INFO L933 BasicCegarLoop]: 1622 mSDtfsCounter, 357 mSDsluCounter, 8487 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 0 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 9314 SdHoareTripleChecker+Invalid, 988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:06:29,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 9314 Invalid, 988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 982 Invalid, 6 Unknown, 0 Unchecked, 28.0s Time] [2021-11-21 00:06:29,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66535 states. [2021-11-21 00:06:31,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66535 to 47663. [2021-11-21 00:06:31,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47663 states, 30984 states have (on average 1.316550477665892) internal successors, (40792), 31208 states have internal predecessors, (40792), 11423 states have call successors, (11423), 5194 states have call predecessors, (11423), 5255 states have return successors, (11688), 11388 states have call predecessors, (11688), 11376 states have call successors, (11688) [2021-11-21 00:06:32,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47663 states to 47663 states and 63903 transitions. [2021-11-21 00:06:32,076 INFO L78 Accepts]: Start accepts. Automaton has 47663 states and 63903 transitions. Word has length 426 [2021-11-21 00:06:32,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:06:32,076 INFO L470 AbstractCegarLoop]: Abstraction has 47663 states and 63903 transitions. [2021-11-21 00:06:32,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 22.5) internal successors, (135), 5 states have internal predecessors, (135), 2 states have call successors, (57), 2 states have call predecessors, (57), 4 states have return successors, (54), 4 states have call predecessors, (54), 2 states have call successors, (54) [2021-11-21 00:06:32,077 INFO L276 IsEmpty]: Start isEmpty. Operand 47663 states and 63903 transitions. [2021-11-21 00:06:32,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 431 [2021-11-21 00:06:32,135 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:06:32,135 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 18, 9, 9, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:06:32,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75515ace-87b1-4739-b358-ef3981af1ee7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-21 00:06:32,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75515ace-87b1-4739-b358-ef3981af1ee7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-21 00:06:32,337 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:06:32,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:06:32,338 INFO L85 PathProgramCache]: Analyzing trace with hash 297718714, now seen corresponding path program 1 times [2021-11-21 00:06:32,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:06:32,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218738780] [2021-11-21 00:06:32,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:06:32,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:06:33,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:06:33,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1738 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 1720 trivial. 0 not checked. [2021-11-21 00:06:33,684 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:06:33,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218738780] [2021-11-21 00:06:33,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218738780] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:06:33,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393760224] [2021-11-21 00:06:33,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:06:33,685 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:06:33,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75515ace-87b1-4739-b358-ef3981af1ee7/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:06:33,686 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75515ace-87b1-4739-b358-ef3981af1ee7/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null)