./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--platform--x86--ideapad-laptop.ko-main.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd97eac-843d-4192-bb22-174174b7f58d/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd97eac-843d-4192-bb22-174174b7f58d/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd97eac-843d-4192-bb22-174174b7f58d/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd97eac-843d-4192-bb22-174174b7f58d/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--platform--x86--ideapad-laptop.ko-main.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd97eac-843d-4192-bb22-174174b7f58d/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd97eac-843d-4192-bb22-174174b7f58d/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 2259272f0273dfac0cad582092d6645e308d8387476548b6016b816b129472dc --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:54:28,918 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:54:28,922 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:54:28,977 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:54:28,977 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:54:28,982 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:54:28,985 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:54:28,989 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:54:28,991 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:54:28,997 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:54:28,998 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:54:29,000 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:54:29,001 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:54:29,003 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:54:29,006 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:54:29,010 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:54:29,012 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:54:29,013 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:54:29,016 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:54:29,024 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:54:29,026 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:54:29,027 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:54:29,031 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:54:29,032 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:54:29,041 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:54:29,042 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:54:29,042 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:54:29,044 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:54:29,045 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:54:29,047 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:54:29,047 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:54:29,048 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:54:29,050 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:54:29,051 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:54:29,053 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:54:29,053 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:54:29,054 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:54:29,055 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:54:29,055 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:54:29,056 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:54:29,057 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:54:29,058 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd97eac-843d-4192-bb22-174174b7f58d/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 02:54:29,097 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:54:29,098 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:54:29,098 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:54:29,099 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:54:29,108 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:54:29,108 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:54:29,108 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:54:29,108 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:54:29,109 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:54:29,109 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:54:29,109 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:54:29,109 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:54:29,109 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:54:29,110 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:54:29,110 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:54:29,110 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:54:29,110 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:54:29,110 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:54:29,112 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:54:29,112 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:54:29,113 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:54:29,113 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:54:29,113 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:54:29,113 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:54:29,113 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:54:29,114 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:54:29,115 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:54:29,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:54:29,116 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:54:29,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:54:29,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:54:29,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:54:29,117 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:54:29,117 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:54:29,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:54:29,117 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:54:29,117 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:54:29,118 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:54:29,118 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_5dd97eac-843d-4192-bb22-174174b7f58d/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd97eac-843d-4192-bb22-174174b7f58d/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2259272f0273dfac0cad582092d6645e308d8387476548b6016b816b129472dc [2021-11-23 02:54:29,399 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:54:29,440 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:54:29,442 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:54:29,444 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:54:29,444 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:54:29,446 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd97eac-843d-4192-bb22-174174b7f58d/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--platform--x86--ideapad-laptop.ko-main.cil.out.i [2021-11-23 02:54:29,523 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd97eac-843d-4192-bb22-174174b7f58d/bin/utaipan-EQgc7hIp5V/data/5e893ed03/b9512235e2214d1883d9310c26a48705/FLAG98b5615cd [2021-11-23 02:54:30,245 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:54:30,246 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd97eac-843d-4192-bb22-174174b7f58d/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--platform--x86--ideapad-laptop.ko-main.cil.out.i [2021-11-23 02:54:30,293 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd97eac-843d-4192-bb22-174174b7f58d/bin/utaipan-EQgc7hIp5V/data/5e893ed03/b9512235e2214d1883d9310c26a48705/FLAG98b5615cd [2021-11-23 02:54:30,355 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd97eac-843d-4192-bb22-174174b7f58d/bin/utaipan-EQgc7hIp5V/data/5e893ed03/b9512235e2214d1883d9310c26a48705 [2021-11-23 02:54:30,357 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:54:30,358 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:54:30,361 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:54:30,361 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:54:30,364 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:54:30,365 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:54:30" (1/1) ... [2021-11-23 02:54:30,366 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43ec9105 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:54:30, skipping insertion in model container [2021-11-23 02:54:30,366 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:54:30" (1/1) ... [2021-11-23 02:54:30,374 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:54:30,468 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:54:31,783 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_5dd97eac-843d-4192-bb22-174174b7f58d/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--platform--x86--ideapad-laptop.ko-main.cil.out.i[160403,160416] [2021-11-23 02:54:31,895 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:54:31,919 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:54:32,197 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_5dd97eac-843d-4192-bb22-174174b7f58d/sv-benchmarks/c/ldv-consumption/32_7a_cilled_linux-3.8-rc1-drivers--platform--x86--ideapad-laptop.ko-main.cil.out.i[160403,160416] [2021-11-23 02:54:32,228 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:54:32,338 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:54:32,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:54:32 WrapperNode [2021-11-23 02:54:32,339 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:54:32,340 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:54:32,340 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:54:32,340 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:54:32,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:54:32" (1/1) ... [2021-11-23 02:54:32,434 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:54:32" (1/1) ... [2021-11-23 02:54:32,568 INFO L137 Inliner]: procedures = 196, calls = 979, calls flagged for inlining = 91, calls inlined = 82, statements flattened = 2523 [2021-11-23 02:54:32,569 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:54:32,569 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:54:32,570 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:54:32,570 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:54:32,579 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:54:32" (1/1) ... [2021-11-23 02:54:32,579 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:54:32" (1/1) ... [2021-11-23 02:54:32,614 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:54:32" (1/1) ... [2021-11-23 02:54:32,615 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:54:32" (1/1) ... [2021-11-23 02:54:32,727 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:54:32" (1/1) ... [2021-11-23 02:54:32,744 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:54:32" (1/1) ... [2021-11-23 02:54:32,757 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:54:32" (1/1) ... [2021-11-23 02:54:32,781 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:54:32,783 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:54:32,783 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:54:32,783 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:54:32,787 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:54:32" (1/1) ... [2021-11-23 02:54:32,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:54:32,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd97eac-843d-4192-bb22-174174b7f58d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:54:32,833 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd97eac-843d-4192-bb22-174174b7f58d/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:54:32,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd97eac-843d-4192-bb22-174174b7f58d/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:54:32,877 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-23 02:54:32,877 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_input_exit [2021-11-23 02:54:32,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_input_exit [2021-11-23 02:54:32,877 INFO L130 BoogieDeclarations]: Found specification of procedure variable_test_bit [2021-11-23 02:54:32,878 INFO L138 BoogieDeclarations]: Found implementation of procedure variable_test_bit [2021-11-23 02:54:32,878 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 02:54:32,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 02:54:32,878 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_input_report [2021-11-23 02:54:32,878 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_input_report [2021-11-23 02:54:32,878 INFO L130 BoogieDeclarations]: Found specification of procedure seq_read [2021-11-23 02:54:32,879 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_read [2021-11-23 02:54:32,879 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-23 02:54:32,879 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-23 02:54:32,879 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-23 02:54:32,879 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-23 02:54:32,879 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-11-23 02:54:32,880 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-11-23 02:54:32,880 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_sync_rfk_state [2021-11-23 02:54:32,880 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_sync_rfk_state [2021-11-23 02:54:32,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:54:32,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:54:32,880 INFO L130 BoogieDeclarations]: Found specification of procedure read_ec_data [2021-11-23 02:54:32,881 INFO L138 BoogieDeclarations]: Found implementation of procedure read_ec_data [2021-11-23 02:54:32,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:54:32,881 INFO L130 BoogieDeclarations]: Found specification of procedure dev_set_drvdata [2021-11-23 02:54:32,881 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_set_drvdata [2021-11-23 02:54:32,881 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_sync_touchpad_state [2021-11-23 02:54:32,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_sync_touchpad_state [2021-11-23 02:54:32,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:54:32,882 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-23 02:54:32,882 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-23 02:54:32,882 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_backlight_init [2021-11-23 02:54:32,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_backlight_init [2021-11-23 02:54:32,882 INFO L130 BoogieDeclarations]: Found specification of procedure acpi_evaluate_integer [2021-11-23 02:54:32,882 INFO L138 BoogieDeclarations]: Found implementation of procedure acpi_evaluate_integer [2021-11-23 02:54:32,883 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2021-11-23 02:54:32,883 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2021-11-23 02:54:32,883 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_acpi_notify [2021-11-23 02:54:32,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_acpi_notify [2021-11-23 02:54:32,883 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2021-11-23 02:54:32,883 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2021-11-23 02:54:32,884 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-23 02:54:32,884 INFO L130 BoogieDeclarations]: Found specification of procedure rfkill_destroy [2021-11-23 02:54:32,884 INFO L138 BoogieDeclarations]: Found implementation of procedure rfkill_destroy [2021-11-23 02:54:32,884 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:54:32,884 INFO L130 BoogieDeclarations]: Found specification of procedure backlight_update_status [2021-11-23 02:54:32,884 INFO L138 BoogieDeclarations]: Found implementation of procedure backlight_update_status [2021-11-23 02:54:32,885 INFO L130 BoogieDeclarations]: Found specification of procedure single_open [2021-11-23 02:54:32,885 INFO L138 BoogieDeclarations]: Found implementation of procedure single_open [2021-11-23 02:54:32,885 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_acpi_add [2021-11-23 02:54:32,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_acpi_add [2021-11-23 02:54:32,885 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_backlight_update_status [2021-11-23 02:54:32,885 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_backlight_update_status [2021-11-23 02:54:32,886 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-23 02:54:32,886 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-23 02:54:32,886 INFO L130 BoogieDeclarations]: Found specification of procedure rfkill_init_sw_state [2021-11-23 02:54:32,886 INFO L138 BoogieDeclarations]: Found implementation of procedure rfkill_init_sw_state [2021-11-23 02:54:32,886 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-23 02:54:32,886 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-23 02:54:32,887 INFO L130 BoogieDeclarations]: Found specification of procedure debugfs_create_file [2021-11-23 02:54:32,887 INFO L138 BoogieDeclarations]: Found implementation of procedure debugfs_create_file [2021-11-23 02:54:32,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:54:32,887 INFO L130 BoogieDeclarations]: Found specification of procedure single_release [2021-11-23 02:54:32,887 INFO L138 BoogieDeclarations]: Found implementation of procedure single_release [2021-11-23 02:54:32,887 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_backlight_get_brightness [2021-11-23 02:54:32,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_backlight_get_brightness [2021-11-23 02:54:32,888 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_unregister_rfkill [2021-11-23 02:54:32,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_unregister_rfkill [2021-11-23 02:54:32,888 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:54:32,888 INFO L130 BoogieDeclarations]: Found specification of procedure seq_lseek [2021-11-23 02:54:32,888 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_lseek [2021-11-23 02:54:32,889 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:54:32,889 INFO L130 BoogieDeclarations]: Found specification of procedure method_vpcr [2021-11-23 02:54:32,889 INFO L138 BoogieDeclarations]: Found implementation of procedure method_vpcr [2021-11-23 02:54:32,889 INFO L130 BoogieDeclarations]: Found specification of procedure method_vpcw [2021-11-23 02:54:32,889 INFO L138 BoogieDeclarations]: Found implementation of procedure method_vpcw [2021-11-23 02:54:32,889 INFO L130 BoogieDeclarations]: Found specification of procedure sparse_keymap_free [2021-11-23 02:54:32,889 INFO L138 BoogieDeclarations]: Found implementation of procedure sparse_keymap_free [2021-11-23 02:54:32,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:54:32,890 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-23 02:54:32,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-23 02:54:32,890 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_acpi_resume [2021-11-23 02:54:32,890 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_acpi_resume [2021-11-23 02:54:32,890 INFO L130 BoogieDeclarations]: Found specification of procedure write_ec_cmd [2021-11-23 02:54:32,891 INFO L138 BoogieDeclarations]: Found implementation of procedure write_ec_cmd [2021-11-23 02:54:32,891 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_platform_exit [2021-11-23 02:54:32,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_platform_exit [2021-11-23 02:54:32,891 INFO L130 BoogieDeclarations]: Found specification of procedure ideapad_debugfs_exit [2021-11-23 02:54:32,891 INFO L138 BoogieDeclarations]: Found implementation of procedure ideapad_debugfs_exit [2021-11-23 02:54:32,891 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:54:32,892 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:54:32,892 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:54:33,418 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:54:33,425 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:54:45,342 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:54:46,481 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:54:46,482 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 02:54:46,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:54:46 BoogieIcfgContainer [2021-11-23 02:54:46,490 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:54:46,492 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:54:46,492 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:54:46,496 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:54:46,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:54:30" (1/3) ... [2021-11-23 02:54:46,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3053c775 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:54:46, skipping insertion in model container [2021-11-23 02:54:46,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:54:32" (2/3) ... [2021-11-23 02:54:46,498 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3053c775 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:54:46, skipping insertion in model container [2021-11-23 02:54:46,498 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:54:46" (3/3) ... [2021-11-23 02:54:46,499 INFO L111 eAbstractionObserver]: Analyzing ICFG 32_7a_cilled_linux-3.8-rc1-drivers--platform--x86--ideapad-laptop.ko-main.cil.out.i [2021-11-23 02:54:46,505 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:54:46,505 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:54:46,573 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:54:46,583 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:54:46,586 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:54:46,637 INFO L276 IsEmpty]: Start isEmpty. Operand has 473 states, 316 states have (on average 1.4778481012658229) internal successors, (467), 335 states have internal predecessors, (467), 116 states have call successors, (116), 39 states have call predecessors, (116), 39 states have return successors, (116), 112 states have call predecessors, (116), 116 states have call successors, (116) [2021-11-23 02:54:46,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 02:54:46,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:54:46,656 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:54:46,656 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:54:46,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:54:46,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1614419724, now seen corresponding path program 1 times [2021-11-23 02:54:46,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:54:46,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726595362] [2021-11-23 02:54:46,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:54:46,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:54:47,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:54:47,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:54:47,242 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:54:47,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726595362] [2021-11-23 02:54:47,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726595362] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:54:47,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:54:47,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:54:47,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869650331] [2021-11-23 02:54:47,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:54:47,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:54:47,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:54:47,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:54:47,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:54:47,290 INFO L87 Difference]: Start difference. First operand has 473 states, 316 states have (on average 1.4778481012658229) internal successors, (467), 335 states have internal predecessors, (467), 116 states have call successors, (116), 39 states have call predecessors, (116), 39 states have return successors, (116), 112 states have call predecessors, (116), 116 states have call successors, (116) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:54:49,350 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:54:50,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:54:50,148 INFO L93 Difference]: Finished difference Result 1401 states and 2081 transitions. [2021-11-23 02:54:50,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:54:50,159 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-23 02:54:50,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:54:50,203 INFO L225 Difference]: With dead ends: 1401 [2021-11-23 02:54:50,203 INFO L226 Difference]: Without dead ends: 927 [2021-11-23 02:54:50,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:54:50,219 INFO L933 BasicCegarLoop]: 701 mSDtfsCounter, 655 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 1289 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:54:50,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [655 Valid, 1289 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 201 Invalid, 1 Unknown, 0 Unchecked, 2.7s Time] [2021-11-23 02:54:50,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2021-11-23 02:54:50,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 923. [2021-11-23 02:54:50,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 621 states have (on average 1.4669887278582932) internal successors, (911), 649 states have internal predecessors, (911), 225 states have call successors, (225), 77 states have call predecessors, (225), 76 states have return successors, (218), 210 states have call predecessors, (218), 218 states have call successors, (218) [2021-11-23 02:54:50,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1354 transitions. [2021-11-23 02:54:50,369 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1354 transitions. Word has length 18 [2021-11-23 02:54:50,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:54:50,370 INFO L470 AbstractCegarLoop]: Abstraction has 923 states and 1354 transitions. [2021-11-23 02:54:50,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 2 states have internal predecessors, (17), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:54:50,374 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1354 transitions. [2021-11-23 02:54:50,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 02:54:50,383 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:54:50,383 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:54:50,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:54:50,384 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:54:50,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:54:50,385 INFO L85 PathProgramCache]: Analyzing trace with hash 230421843, now seen corresponding path program 1 times [2021-11-23 02:54:50,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:54:50,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502789428] [2021-11-23 02:54:50,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:54:50,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:54:50,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:54:50,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:54:50,617 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:54:50,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502789428] [2021-11-23 02:54:50,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502789428] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:54:50,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:54:50,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:54:50,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325513775] [2021-11-23 02:54:50,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:54:50,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:54:50,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:54:50,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:54:50,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:54:50,622 INFO L87 Difference]: Start difference. First operand 923 states and 1354 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:54:52,660 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:54:53,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:54:53,026 INFO L93 Difference]: Finished difference Result 925 states and 1355 transitions. [2021-11-23 02:54:53,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:54:53,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-23 02:54:53,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:54:53,036 INFO L225 Difference]: With dead ends: 925 [2021-11-23 02:54:53,036 INFO L226 Difference]: Without dead ends: 922 [2021-11-23 02:54:53,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:54:53,039 INFO L933 BasicCegarLoop]: 589 mSDtfsCounter, 670 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 670 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:54:53,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [670 Valid, 589 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-23 02:54:53,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922 states. [2021-11-23 02:54:53,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 922 to 922. [2021-11-23 02:54:53,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 621 states have (on average 1.465378421900161) internal successors, (910), 648 states have internal predecessors, (910), 224 states have call successors, (224), 77 states have call predecessors, (224), 76 states have return successors, (218), 210 states have call predecessors, (218), 218 states have call successors, (218) [2021-11-23 02:54:53,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1352 transitions. [2021-11-23 02:54:53,114 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1352 transitions. Word has length 20 [2021-11-23 02:54:53,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:54:53,114 INFO L470 AbstractCegarLoop]: Abstraction has 922 states and 1352 transitions. [2021-11-23 02:54:53,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:54:53,115 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1352 transitions. [2021-11-23 02:54:53,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-23 02:54:53,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:54:53,117 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:54:53,117 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:54:53,118 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:54:53,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:54:53,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1447111222, now seen corresponding path program 1 times [2021-11-23 02:54:53,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:54:53,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748351920] [2021-11-23 02:54:53,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:54:53,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:54:53,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:54:53,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:54:53,341 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:54:53,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748351920] [2021-11-23 02:54:53,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748351920] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:54:53,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:54:53,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:54:53,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395781487] [2021-11-23 02:54:53,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:54:53,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:54:53,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:54:53,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:54:53,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:54:53,344 INFO L87 Difference]: Start difference. First operand 922 states and 1352 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:54:55,380 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:54:55,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:54:55,723 INFO L93 Difference]: Finished difference Result 924 states and 1353 transitions. [2021-11-23 02:54:55,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:54:55,724 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-23 02:54:55,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:54:55,732 INFO L225 Difference]: With dead ends: 924 [2021-11-23 02:54:55,732 INFO L226 Difference]: Without dead ends: 921 [2021-11-23 02:54:55,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:54:55,734 INFO L933 BasicCegarLoop]: 587 mSDtfsCounter, 667 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:54:55,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [667 Valid, 587 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-23 02:54:55,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 921 states. [2021-11-23 02:54:55,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 921 to 921. [2021-11-23 02:54:55,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 621 states have (on average 1.463768115942029) internal successors, (909), 647 states have internal predecessors, (909), 223 states have call successors, (223), 77 states have call predecessors, (223), 76 states have return successors, (218), 210 states have call predecessors, (218), 218 states have call successors, (218) [2021-11-23 02:54:55,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 1350 transitions. [2021-11-23 02:54:55,800 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 1350 transitions. Word has length 21 [2021-11-23 02:54:55,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:54:55,800 INFO L470 AbstractCegarLoop]: Abstraction has 921 states and 1350 transitions. [2021-11-23 02:54:55,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 2 states have internal predecessors, (20), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:54:55,800 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 1350 transitions. [2021-11-23 02:54:55,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-23 02:54:55,802 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:54:55,802 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:54:55,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:54:55,803 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:54:55,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:54:55,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1911023818, now seen corresponding path program 1 times [2021-11-23 02:54:55,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:54:55,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601339357] [2021-11-23 02:54:55,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:54:55,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:54:55,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:54:55,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:54:55,945 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:54:55,945 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601339357] [2021-11-23 02:54:55,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601339357] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:54:55,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:54:55,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:54:55,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585533548] [2021-11-23 02:54:55,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:54:55,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:54:55,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:54:55,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:54:55,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:54:55,951 INFO L87 Difference]: Start difference. First operand 921 states and 1350 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:54:57,987 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:54:58,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:54:58,302 INFO L93 Difference]: Finished difference Result 923 states and 1351 transitions. [2021-11-23 02:54:58,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:54:58,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-23 02:54:58,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:54:58,311 INFO L225 Difference]: With dead ends: 923 [2021-11-23 02:54:58,311 INFO L226 Difference]: Without dead ends: 920 [2021-11-23 02:54:58,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:54:58,313 INFO L933 BasicCegarLoop]: 585 mSDtfsCounter, 664 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 664 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:54:58,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [664 Valid, 585 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-23 02:54:58,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2021-11-23 02:54:58,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 920. [2021-11-23 02:54:58,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 621 states have (on average 1.462157809983897) internal successors, (908), 646 states have internal predecessors, (908), 222 states have call successors, (222), 77 states have call predecessors, (222), 76 states have return successors, (218), 210 states have call predecessors, (218), 218 states have call successors, (218) [2021-11-23 02:54:58,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 1348 transitions. [2021-11-23 02:54:58,385 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 1348 transitions. Word has length 22 [2021-11-23 02:54:58,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:54:58,386 INFO L470 AbstractCegarLoop]: Abstraction has 920 states and 1348 transitions. [2021-11-23 02:54:58,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 2 states have internal predecessors, (21), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:54:58,386 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 1348 transitions. [2021-11-23 02:54:58,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 02:54:58,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:54:58,389 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:54:58,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:54:58,390 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:54:58,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:54:58,393 INFO L85 PathProgramCache]: Analyzing trace with hash 887559757, now seen corresponding path program 1 times [2021-11-23 02:54:58,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:54:58,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093689182] [2021-11-23 02:54:58,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:54:58,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:54:58,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:54:58,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:54:58,569 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:54:58,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093689182] [2021-11-23 02:54:58,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093689182] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:54:58,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:54:58,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:54:58,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501852672] [2021-11-23 02:54:58,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:54:58,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:54:58,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:54:58,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:54:58,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:54:58,572 INFO L87 Difference]: Start difference. First operand 920 states and 1348 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:55:00,611 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:55:00,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:55:00,967 INFO L93 Difference]: Finished difference Result 922 states and 1349 transitions. [2021-11-23 02:55:00,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:55:00,968 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-23 02:55:00,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:55:00,977 INFO L225 Difference]: With dead ends: 922 [2021-11-23 02:55:00,977 INFO L226 Difference]: Without dead ends: 919 [2021-11-23 02:55:00,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:55:00,982 INFO L933 BasicCegarLoop]: 583 mSDtfsCounter, 661 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 661 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:55:00,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [661 Valid, 583 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 97 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2021-11-23 02:55:00,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2021-11-23 02:55:01,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 919. [2021-11-23 02:55:01,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 621 states have (on average 1.460547504025765) internal successors, (907), 645 states have internal predecessors, (907), 221 states have call successors, (221), 77 states have call predecessors, (221), 76 states have return successors, (218), 210 states have call predecessors, (218), 218 states have call successors, (218) [2021-11-23 02:55:01,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1346 transitions. [2021-11-23 02:55:01,055 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1346 transitions. Word has length 23 [2021-11-23 02:55:01,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:55:01,055 INFO L470 AbstractCegarLoop]: Abstraction has 919 states and 1346 transitions. [2021-11-23 02:55:01,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:55:01,057 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1346 transitions. [2021-11-23 02:55:01,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 02:55:01,059 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:55:01,060 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:55:01,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:55:01,060 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:55:01,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:55:01,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1744309529, now seen corresponding path program 1 times [2021-11-23 02:55:01,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:55:01,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042965176] [2021-11-23 02:55:01,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:01,061 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:55:01,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:01,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:55:01,210 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:55:01,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042965176] [2021-11-23 02:55:01,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042965176] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:55:01,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:55:01,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 02:55:01,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936605619] [2021-11-23 02:55:01,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:55:01,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:55:01,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:55:01,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:55:01,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:55:01,212 INFO L87 Difference]: Start difference. First operand 919 states and 1346 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:55:03,249 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:55:03,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:55:03,781 INFO L93 Difference]: Finished difference Result 2289 states and 3302 transitions. [2021-11-23 02:55:03,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:55:03,782 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-23 02:55:03,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:55:03,793 INFO L225 Difference]: With dead ends: 2289 [2021-11-23 02:55:03,793 INFO L226 Difference]: Without dead ends: 1365 [2021-11-23 02:55:03,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:55:03,800 INFO L933 BasicCegarLoop]: 644 mSDtfsCounter, 631 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 911 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:55:03,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [631 Valid, 911 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 155 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-23 02:55:03,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2021-11-23 02:55:03,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1359. [2021-11-23 02:55:03,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1359 states, 894 states have (on average 1.4116331096196868) internal successors, (1262), 926 states have internal predecessors, (1262), 330 states have call successors, (330), 135 states have call predecessors, (330), 134 states have return successors, (334), 321 states have call predecessors, (334), 328 states have call successors, (334) [2021-11-23 02:55:03,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1359 states to 1359 states and 1926 transitions. [2021-11-23 02:55:03,901 INFO L78 Accepts]: Start accepts. Automaton has 1359 states and 1926 transitions. Word has length 24 [2021-11-23 02:55:03,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:55:03,902 INFO L470 AbstractCegarLoop]: Abstraction has 1359 states and 1926 transitions. [2021-11-23 02:55:03,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 02:55:03,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1359 states and 1926 transitions. [2021-11-23 02:55:03,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-23 02:55:03,910 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:55:03,911 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 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] [2021-11-23 02:55:03,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:55:03,911 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:55:03,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:55:03,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1744246743, now seen corresponding path program 1 times [2021-11-23 02:55:03,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:55:03,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300463281] [2021-11-23 02:55:03,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:03,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:55:03,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:04,191 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2021-11-23 02:55:04,191 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:55:04,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300463281] [2021-11-23 02:55:04,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300463281] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:55:04,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:55:04,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:55:04,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521999136] [2021-11-23 02:55:04,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:55:04,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:55:04,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:55:04,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:55:04,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:55:04,194 INFO L87 Difference]: Start difference. First operand 1359 states and 1926 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-23 02:55:06,231 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:55:06,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:55:06,809 INFO L93 Difference]: Finished difference Result 2454 states and 3507 transitions. [2021-11-23 02:55:06,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:55:06,810 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 154 [2021-11-23 02:55:06,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:55:06,819 INFO L225 Difference]: With dead ends: 2454 [2021-11-23 02:55:06,819 INFO L226 Difference]: Without dead ends: 1096 [2021-11-23 02:55:06,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:55:06,826 INFO L933 BasicCegarLoop]: 617 mSDtfsCounter, 298 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 1181 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:55:06,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 1181 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 203 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-23 02:55:06,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2021-11-23 02:55:06,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 1096. [2021-11-23 02:55:06,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 744 states have (on average 1.461021505376344) internal successors, (1087), 762 states have internal predecessors, (1087), 246 states have call successors, (246), 106 states have call predecessors, (246), 105 states have return successors, (247), 241 states have call predecessors, (247), 244 states have call successors, (247) [2021-11-23 02:55:06,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 1580 transitions. [2021-11-23 02:55:06,894 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 1580 transitions. Word has length 154 [2021-11-23 02:55:06,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:55:06,894 INFO L470 AbstractCegarLoop]: Abstraction has 1096 states and 1580 transitions. [2021-11-23 02:55:06,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-23 02:55:06,895 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 1580 transitions. [2021-11-23 02:55:06,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-23 02:55:06,900 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:55:06,901 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:55:06,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:55:06,901 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:55:06,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:55:06,902 INFO L85 PathProgramCache]: Analyzing trace with hash 96110057, now seen corresponding path program 1 times [2021-11-23 02:55:06,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:55:06,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192836627] [2021-11-23 02:55:06,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:06,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:55:07,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:07,147 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-11-23 02:55:07,148 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:55:07,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192836627] [2021-11-23 02:55:07,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192836627] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:55:07,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:55:07,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:55:07,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786976985] [2021-11-23 02:55:07,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:55:07,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:55:07,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:55:07,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:55:07,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:55:07,151 INFO L87 Difference]: Start difference. First operand 1096 states and 1580 transitions. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-23 02:55:09,187 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:55:09,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:55:09,856 INFO L93 Difference]: Finished difference Result 1997 states and 2879 transitions. [2021-11-23 02:55:09,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:55:09,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 169 [2021-11-23 02:55:09,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:55:09,866 INFO L225 Difference]: With dead ends: 1997 [2021-11-23 02:55:09,866 INFO L226 Difference]: Without dead ends: 1108 [2021-11-23 02:55:09,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:55:09,871 INFO L933 BasicCegarLoop]: 577 mSDtfsCounter, 7 mSDsluCounter, 1327 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1716 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:55:09,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 1716 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 304 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2021-11-23 02:55:09,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-11-23 02:55:09,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 1104. [2021-11-23 02:55:09,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 750 states have (on average 1.4573333333333334) internal successors, (1093), 769 states have internal predecessors, (1093), 247 states have call successors, (247), 106 states have call predecessors, (247), 106 states have return successors, (249), 242 states have call predecessors, (249), 245 states have call successors, (249) [2021-11-23 02:55:09,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 1589 transitions. [2021-11-23 02:55:09,951 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 1589 transitions. Word has length 169 [2021-11-23 02:55:09,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:55:09,952 INFO L470 AbstractCegarLoop]: Abstraction has 1104 states and 1589 transitions. [2021-11-23 02:55:09,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 2 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-23 02:55:09,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 1589 transitions. [2021-11-23 02:55:09,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-23 02:55:09,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:55:09,961 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:55:09,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:55:09,962 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:55:09,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:55:09,963 INFO L85 PathProgramCache]: Analyzing trace with hash 2081288391, now seen corresponding path program 1 times [2021-11-23 02:55:09,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:55:09,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083221297] [2021-11-23 02:55:09,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:09,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:55:10,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:10,255 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-23 02:55:10,255 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:55:10,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083221297] [2021-11-23 02:55:10,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083221297] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:55:10,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:55:10,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:55:10,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263690937] [2021-11-23 02:55:10,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:55:10,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:55:10,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:55:10,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:55:10,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:55:10,260 INFO L87 Difference]: Start difference. First operand 1104 states and 1589 transitions. Second operand has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-23 02:55:12,296 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:55:12,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:55:12,948 INFO L93 Difference]: Finished difference Result 2015 states and 2901 transitions. [2021-11-23 02:55:12,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:55:12,949 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 175 [2021-11-23 02:55:12,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:55:12,957 INFO L225 Difference]: With dead ends: 2015 [2021-11-23 02:55:12,957 INFO L226 Difference]: Without dead ends: 1118 [2021-11-23 02:55:12,961 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:55:12,962 INFO L933 BasicCegarLoop]: 580 mSDtfsCounter, 7 mSDsluCounter, 1330 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1721 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:55:12,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 1721 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 304 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2021-11-23 02:55:12,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1118 states. [2021-11-23 02:55:13,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1118 to 1109. [2021-11-23 02:55:13,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1109 states, 754 states have (on average 1.4549071618037135) internal successors, (1097), 774 states have internal predecessors, (1097), 248 states have call successors, (248), 106 states have call predecessors, (248), 106 states have return successors, (250), 243 states have call predecessors, (250), 246 states have call successors, (250) [2021-11-23 02:55:13,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1109 states to 1109 states and 1595 transitions. [2021-11-23 02:55:13,028 INFO L78 Accepts]: Start accepts. Automaton has 1109 states and 1595 transitions. Word has length 175 [2021-11-23 02:55:13,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:55:13,029 INFO L470 AbstractCegarLoop]: Abstraction has 1109 states and 1595 transitions. [2021-11-23 02:55:13,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.5) internal successors, (86), 4 states have internal predecessors, (86), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-23 02:55:13,029 INFO L276 IsEmpty]: Start isEmpty. Operand 1109 states and 1595 transitions. [2021-11-23 02:55:13,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-23 02:55:13,036 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:55:13,036 INFO L514 BasicCegarLoop]: trace histogram [8, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:55:13,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 02:55:13,037 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:55:13,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:55:13,037 INFO L85 PathProgramCache]: Analyzing trace with hash 691141769, now seen corresponding path program 1 times [2021-11-23 02:55:13,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:55:13,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060638593] [2021-11-23 02:55:13,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:13,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:55:13,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:13,390 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-11-23 02:55:13,390 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:55:13,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060638593] [2021-11-23 02:55:13,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060638593] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:55:13,390 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:55:13,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:55:13,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282861767] [2021-11-23 02:55:13,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:55:13,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:55:13,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:55:13,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:55:13,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:55:13,394 INFO L87 Difference]: Start difference. First operand 1109 states and 1595 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-23 02:55:15,432 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:55:16,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:55:16,066 INFO L93 Difference]: Finished difference Result 2027 states and 2917 transitions. [2021-11-23 02:55:16,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:55:16,067 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 192 [2021-11-23 02:55:16,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:55:16,076 INFO L225 Difference]: With dead ends: 2027 [2021-11-23 02:55:16,076 INFO L226 Difference]: Without dead ends: 1125 [2021-11-23 02:55:16,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:55:16,081 INFO L933 BasicCegarLoop]: 582 mSDtfsCounter, 7 mSDsluCounter, 1331 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 1725 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:55:16,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 1725 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 304 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2021-11-23 02:55:16,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2021-11-23 02:55:16,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 1114. [2021-11-23 02:55:16,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 758 states have (on average 1.4525065963060686) internal successors, (1101), 779 states have internal predecessors, (1101), 249 states have call successors, (249), 106 states have call predecessors, (249), 106 states have return successors, (251), 244 states have call predecessors, (251), 247 states have call successors, (251) [2021-11-23 02:55:16,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 1601 transitions. [2021-11-23 02:55:16,152 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 1601 transitions. Word has length 192 [2021-11-23 02:55:16,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:55:16,153 INFO L470 AbstractCegarLoop]: Abstraction has 1114 states and 1601 transitions. [2021-11-23 02:55:16,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-23 02:55:16,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 1601 transitions. [2021-11-23 02:55:16,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-23 02:55:16,161 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:55:16,161 INFO L514 BasicCegarLoop]: trace histogram [8, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:55:16,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 02:55:16,162 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:55:16,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:55:16,163 INFO L85 PathProgramCache]: Analyzing trace with hash -2037230334, now seen corresponding path program 1 times [2021-11-23 02:55:16,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:55:16,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806532629] [2021-11-23 02:55:16,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:16,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:55:16,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:16,443 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-11-23 02:55:16,443 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:55:16,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806532629] [2021-11-23 02:55:16,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806532629] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:55:16,444 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:55:16,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:55:16,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052202825] [2021-11-23 02:55:16,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:55:16,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:55:16,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:55:16,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:55:16,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:55:16,446 INFO L87 Difference]: Start difference. First operand 1114 states and 1601 transitions. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-23 02:55:18,488 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:55:18,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:55:18,979 INFO L93 Difference]: Finished difference Result 2077 states and 2993 transitions. [2021-11-23 02:55:18,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:55:18,980 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) Word has length 194 [2021-11-23 02:55:18,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:55:18,989 INFO L225 Difference]: With dead ends: 2077 [2021-11-23 02:55:18,989 INFO L226 Difference]: Without dead ends: 1170 [2021-11-23 02:55:18,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:55:18,994 INFO L933 BasicCegarLoop]: 580 mSDtfsCounter, 22 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:55:18,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 1147 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 202 Invalid, 1 Unknown, 0 Unchecked, 2.5s Time] [2021-11-23 02:55:18,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2021-11-23 02:55:19,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 1118. [2021-11-23 02:55:19,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 762 states have (on average 1.4501312335958005) internal successors, (1105), 783 states have internal predecessors, (1105), 249 states have call successors, (249), 106 states have call predecessors, (249), 106 states have return successors, (251), 244 states have call predecessors, (251), 247 states have call successors, (251) [2021-11-23 02:55:19,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 1605 transitions. [2021-11-23 02:55:19,065 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 1605 transitions. Word has length 194 [2021-11-23 02:55:19,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:55:19,065 INFO L470 AbstractCegarLoop]: Abstraction has 1118 states and 1605 transitions. [2021-11-23 02:55:19,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 2 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (23), 2 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-23 02:55:19,066 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 1605 transitions. [2021-11-23 02:55:19,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2021-11-23 02:55:19,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:55:19,073 INFO L514 BasicCegarLoop]: trace histogram [8, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:55:19,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 02:55:19,074 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:55:19,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:55:19,074 INFO L85 PathProgramCache]: Analyzing trace with hash -2097996430, now seen corresponding path program 1 times [2021-11-23 02:55:19,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:55:19,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093271013] [2021-11-23 02:55:19,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:19,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:55:19,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:19,385 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2021-11-23 02:55:19,385 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:55:19,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093271013] [2021-11-23 02:55:19,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093271013] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:55:19,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499960408] [2021-11-23 02:55:19,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:19,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:55:19,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd97eac-843d-4192-bb22-174174b7f58d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:55:19,388 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd97eac-843d-4192-bb22-174174b7f58d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:55:19,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd97eac-843d-4192-bb22-174174b7f58d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:55:20,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:20,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 3392 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:55:20,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:55:20,745 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-11-23 02:55:20,746 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:55:20,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499960408] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:55:20,746 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:55:20,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-23 02:55:20,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713572864] [2021-11-23 02:55:20,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:55:20,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:55:20,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:55:20,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:55:20,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:55:20,749 INFO L87 Difference]: Start difference. First operand 1118 states and 1605 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-23 02:55:22,787 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:55:23,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:55:23,420 INFO L93 Difference]: Finished difference Result 1423 states and 1991 transitions. [2021-11-23 02:55:23,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:55:23,421 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 201 [2021-11-23 02:55:23,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:55:23,430 INFO L225 Difference]: With dead ends: 1423 [2021-11-23 02:55:23,430 INFO L226 Difference]: Without dead ends: 1111 [2021-11-23 02:55:23,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:55:23,434 INFO L933 BasicCegarLoop]: 809 mSDtfsCounter, 314 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 1351 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:55:23,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 1351 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 238 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2021-11-23 02:55:23,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2021-11-23 02:55:23,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 1105. [2021-11-23 02:55:23,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1105 states, 755 states have (on average 1.4516556291390728) internal successors, (1096), 773 states have internal predecessors, (1096), 245 states have call successors, (245), 106 states have call predecessors, (245), 104 states have return successors, (243), 239 states have call predecessors, (243), 243 states have call successors, (243) [2021-11-23 02:55:23,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1105 states to 1105 states and 1584 transitions. [2021-11-23 02:55:23,512 INFO L78 Accepts]: Start accepts. Automaton has 1105 states and 1584 transitions. Word has length 201 [2021-11-23 02:55:23,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:55:23,513 INFO L470 AbstractCegarLoop]: Abstraction has 1105 states and 1584 transitions. [2021-11-23 02:55:23,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-23 02:55:23,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1105 states and 1584 transitions. [2021-11-23 02:55:23,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2021-11-23 02:55:23,527 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:55:23,527 INFO L514 BasicCegarLoop]: trace histogram [16, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:55:23,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd97eac-843d-4192-bb22-174174b7f58d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:55:23,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd97eac-843d-4192-bb22-174174b7f58d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-23 02:55:23,752 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:55:23,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:55:23,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1926101036, now seen corresponding path program 1 times [2021-11-23 02:55:23,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:55:23,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267929541] [2021-11-23 02:55:23,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:23,753 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:55:23,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:24,164 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 713 trivial. 0 not checked. [2021-11-23 02:55:24,164 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:55:24,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267929541] [2021-11-23 02:55:24,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267929541] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:55:24,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885659144] [2021-11-23 02:55:24,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:24,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:55:24,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd97eac-843d-4192-bb22-174174b7f58d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:55:24,167 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd97eac-843d-4192-bb22-174174b7f58d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:55:24,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd97eac-843d-4192-bb22-174174b7f58d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:55:25,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:25,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 5202 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:55:25,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:55:26,196 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 208 proven. 1 refuted. 0 times theorem prover too weak. 549 trivial. 0 not checked. [2021-11-23 02:55:26,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:55:27,025 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 44 proven. 1 refuted. 0 times theorem prover too weak. 713 trivial. 0 not checked. [2021-11-23 02:55:27,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885659144] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:55:27,026 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [75667280] [2021-11-23 02:55:27,058 INFO L159 IcfgInterpreter]: Started Sifa with 139 locations of interest [2021-11-23 02:55:27,058 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:55:27,068 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 02:55:27,069 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:55:27,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2021-11-23 02:55:27,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970780697] [2021-11-23 02:55:27,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:55:27,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:55:27,074 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:55:27,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:55:27,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:55:27,076 INFO L87 Difference]: Start difference. First operand 1105 states and 1584 transitions. Second operand has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 5 states have call successors, (66), 2 states have call predecessors, (66), 2 states have return successors, (60), 5 states have call predecessors, (60), 5 states have call successors, (60) [2021-11-23 02:55:29,111 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:55:29,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:55:29,924 INFO L93 Difference]: Finished difference Result 2115 states and 3043 transitions. [2021-11-23 02:55:29,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:55:29,925 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 5 states have call successors, (66), 2 states have call predecessors, (66), 2 states have return successors, (60), 5 states have call predecessors, (60), 5 states have call successors, (60) Word has length 365 [2021-11-23 02:55:29,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:55:29,934 INFO L225 Difference]: With dead ends: 2115 [2021-11-23 02:55:29,934 INFO L226 Difference]: Without dead ends: 1217 [2021-11-23 02:55:29,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 728 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:55:29,940 INFO L933 BasicCegarLoop]: 587 mSDtfsCounter, 85 mSDsluCounter, 1929 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 19 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 2240 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:55:29,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 2240 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 426 Invalid, 1 Unknown, 0 Unchecked, 2.8s Time] [2021-11-23 02:55:29,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1217 states. [2021-11-23 02:55:30,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1217 to 1217. [2021-11-23 02:55:30,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1217 states, 831 states have (on average 1.434416365824308) internal successors, (1192), 849 states have internal predecessors, (1192), 281 states have call successors, (281), 106 states have call predecessors, (281), 104 states have return successors, (279), 275 states have call predecessors, (279), 279 states have call successors, (279) [2021-11-23 02:55:30,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 1752 transitions. [2021-11-23 02:55:30,019 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 1752 transitions. Word has length 365 [2021-11-23 02:55:30,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:55:30,020 INFO L470 AbstractCegarLoop]: Abstraction has 1217 states and 1752 transitions. [2021-11-23 02:55:30,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 5 states have call successors, (66), 2 states have call predecessors, (66), 2 states have return successors, (60), 5 states have call predecessors, (60), 5 states have call successors, (60) [2021-11-23 02:55:30,020 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 1752 transitions. [2021-11-23 02:55:30,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 394 [2021-11-23 02:55:30,033 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:55:30,034 INFO L514 BasicCegarLoop]: trace histogram [16, 10, 10, 10, 10, 10, 10, 10, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:55:30,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd97eac-843d-4192-bb22-174174b7f58d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:55:30,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd97eac-843d-4192-bb22-174174b7f58d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:55:30,248 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:55:30,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:55:30,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1381984340, now seen corresponding path program 2 times [2021-11-23 02:55:30,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:55:30,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5287138] [2021-11-23 02:55:30,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:30,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:55:30,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:30,759 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 99 proven. 32 refuted. 0 times theorem prover too weak. 733 trivial. 0 not checked. [2021-11-23 02:55:30,759 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:55:30,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5287138] [2021-11-23 02:55:30,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5287138] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:55:30,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198889610] [2021-11-23 02:55:30,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:55:30,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:55:30,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd97eac-843d-4192-bb22-174174b7f58d/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:55:30,766 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd97eac-843d-4192-bb22-174174b7f58d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:55:30,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5dd97eac-843d-4192-bb22-174174b7f58d/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process