./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.7.3/main0_drivers--media--dvb-frontends--stv090x-ko---32_7a--linux-3.7.3.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f951e6-5d63-41d2-9356-c6603544c33d/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f951e6-5d63-41d2-9356-c6603544c33d/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f951e6-5d63-41d2-9356-c6603544c33d/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f951e6-5d63-41d2-9356-c6603544c33d/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.7.3/main0_drivers--media--dvb-frontends--stv090x-ko---32_7a--linux-3.7.3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f951e6-5d63-41d2-9356-c6603544c33d/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f951e6-5d63-41d2-9356-c6603544c33d/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 1edb128dac5f1749a8164cdbec3766f388b8d95e25a83a97d25b5ef9e1604ba3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:39:45,012 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:39:45,015 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:39:45,074 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:39:45,075 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:39:45,080 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:39:45,083 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:39:45,088 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:39:45,091 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:39:45,102 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:39:45,104 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:39:45,106 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:39:45,107 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:39:45,110 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:39:45,114 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:39:45,121 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:39:45,123 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:39:45,125 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:39:45,127 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:39:45,139 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:39:45,142 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:39:45,144 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:39:45,148 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:39:45,150 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:39:45,161 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:39:45,162 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:39:45,163 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:39:45,166 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:39:45,167 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:39:45,169 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:39:45,171 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:39:45,172 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:39:45,175 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:39:45,176 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:39:45,179 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:39:45,179 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:39:45,180 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:39:45,180 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:39:45,181 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:39:45,182 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:39:45,183 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:39:45,184 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f951e6-5d63-41d2-9356-c6603544c33d/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-20 23:39:45,244 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:39:45,246 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:39:45,247 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:39:45,247 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:39:45,248 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:39:45,249 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:39:45,249 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:39:45,250 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:39:45,250 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:39:45,250 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:39:45,252 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:39:45,252 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:39:45,253 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:39:45,253 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:39:45,254 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:39:45,254 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:39:45,254 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:39:45,255 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:39:45,257 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:39:45,257 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:39:45,258 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:39:45,258 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:39:45,258 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:39:45,259 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:39:45,259 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:39:45,259 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:39:45,262 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:39:45,263 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:39:45,263 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:39:45,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:39:45,264 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:39:45,264 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:39:45,264 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:39:45,265 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:39:45,265 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:39:45,265 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:39:45,266 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:39:45,266 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:39:45,266 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_71f951e6-5d63-41d2-9356-c6603544c33d/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f951e6-5d63-41d2-9356-c6603544c33d/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1edb128dac5f1749a8164cdbec3766f388b8d95e25a83a97d25b5ef9e1604ba3 [2021-11-20 23:39:45,595 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:39:45,617 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:39:45,620 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:39:45,621 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:39:45,621 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:39:45,623 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f951e6-5d63-41d2-9356-c6603544c33d/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/ldv-linux-3.7.3/main0_drivers--media--dvb-frontends--stv090x-ko---32_7a--linux-3.7.3.i [2021-11-20 23:39:45,726 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f951e6-5d63-41d2-9356-c6603544c33d/bin/utaipan-TEXQjIfE4P/data/b6ac1aabf/a0e069c62f014ddaaa9aef0983293b28/FLAG4e2667d5b [2021-11-20 23:39:47,019 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:39:47,020 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f951e6-5d63-41d2-9356-c6603544c33d/sv-benchmarks/c/ldv-linux-3.7.3/main0_drivers--media--dvb-frontends--stv090x-ko---32_7a--linux-3.7.3.i [2021-11-20 23:39:47,090 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f951e6-5d63-41d2-9356-c6603544c33d/bin/utaipan-TEXQjIfE4P/data/b6ac1aabf/a0e069c62f014ddaaa9aef0983293b28/FLAG4e2667d5b [2021-11-20 23:39:47,252 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f951e6-5d63-41d2-9356-c6603544c33d/bin/utaipan-TEXQjIfE4P/data/b6ac1aabf/a0e069c62f014ddaaa9aef0983293b28 [2021-11-20 23:39:47,255 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:39:47,257 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:39:47,258 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:39:47,259 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:39:47,263 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:39:47,264 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:39:47" (1/1) ... [2021-11-20 23:39:47,265 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12dd07d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:47, skipping insertion in model container [2021-11-20 23:39:47,266 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:39:47" (1/1) ... [2021-11-20 23:39:47,275 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:39:47,525 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:39:50,405 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_71f951e6-5d63-41d2-9356-c6603544c33d/sv-benchmarks/c/ldv-linux-3.7.3/main0_drivers--media--dvb-frontends--stv090x-ko---32_7a--linux-3.7.3.i[424236,424249] [2021-11-20 23:39:50,628 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:39:50,765 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:39:51,510 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_71f951e6-5d63-41d2-9356-c6603544c33d/sv-benchmarks/c/ldv-linux-3.7.3/main0_drivers--media--dvb-frontends--stv090x-ko---32_7a--linux-3.7.3.i[424236,424249] [2021-11-20 23:39:51,522 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:39:51,727 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:39:51,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:51 WrapperNode [2021-11-20 23:39:51,728 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:39:51,729 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:39:51,730 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:39:51,730 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:39:51,740 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:51" (1/1) ... [2021-11-20 23:39:51,983 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:51" (1/1) ... [2021-11-20 23:39:52,665 INFO L137 Inliner]: procedures = 189, calls = 6921, calls flagged for inlining = 69, calls inlined = 54, statements flattened = 16566 [2021-11-20 23:39:52,666 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:39:52,667 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:39:52,668 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:39:52,668 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:39:52,679 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:51" (1/1) ... [2021-11-20 23:39:52,689 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:51" (1/1) ... [2021-11-20 23:39:52,841 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:51" (1/1) ... [2021-11-20 23:39:52,857 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:51" (1/1) ... [2021-11-20 23:39:53,270 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:51" (1/1) ... [2021-11-20 23:39:53,415 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:51" (1/1) ... [2021-11-20 23:39:53,463 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:51" (1/1) ... [2021-11-20 23:39:53,580 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:39:53,581 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:39:53,582 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:39:53,582 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:39:53,583 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:51" (1/1) ... [2021-11-20 23:39:53,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:39:53,608 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f951e6-5d63-41d2-9356-c6603544c33d/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:39:53,627 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f951e6-5d63-41d2-9356-c6603544c33d/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:39:53,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_71f951e6-5d63-41d2-9356-c6603544c33d/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:39:53,685 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_demod_lock [2021-11-20 23:39:53,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_demod_lock [2021-11-20 23:39:53,686 INFO L130 BoogieDeclarations]: Found specification of procedure find_dev [2021-11-20 23:39:53,686 INFO L138 BoogieDeclarations]: Found implementation of procedure find_dev [2021-11-20 23:39:53,686 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_vitclk_ctl [2021-11-20 23:39:53,686 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_vitclk_ctl [2021-11-20 23:39:53,687 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-20 23:39:53,687 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-20 23:39:53,687 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-20 23:39:53,687 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_send_diseqc_burst [2021-11-20 23:39:53,687 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_send_diseqc_burst [2021-11-20 23:39:53,688 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_lock_demod_lock [2021-11-20 23:39:53,688 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_lock_demod_lock [2021-11-20 23:39:53,688 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_i2c_gate_ctrl [2021-11-20 23:39:53,688 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_i2c_gate_ctrl [2021-11-20 23:39:53,689 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-20 23:39:53,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-20 23:39:53,689 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_get_srate [2021-11-20 23:39:53,689 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_get_srate [2021-11-20 23:39:53,689 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 23:39:53,690 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_read_per [2021-11-20 23:39:53,690 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_read_per [2021-11-20 23:39:53,690 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_activate_modcod [2021-11-20 23:39:53,690 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_activate_modcod [2021-11-20 23:39:53,690 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_dvbs_track_crl [2021-11-20 23:39:53,691 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_dvbs_track_crl [2021-11-20 23:39:53,691 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-20 23:39:53,691 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-20 23:39:53,691 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_set_viterbi [2021-11-20 23:39:53,691 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_set_viterbi [2021-11-20 23:39:53,692 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_read_signal_strength [2021-11-20 23:39:53,692 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_read_signal_strength [2021-11-20 23:39:53,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 23:39:53,693 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-20 23:39:53,693 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-20 23:39:53,693 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_send_diseqc_msg [2021-11-20 23:39:53,693 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_send_diseqc_msg [2021-11-20 23:39:53,694 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-20 23:39:53,694 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-20 23:39:53,694 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_set_vit_thacq [2021-11-20 23:39:53,695 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_set_vit_thacq [2021-11-20 23:39:53,695 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_car_width [2021-11-20 23:39:53,695 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_car_width [2021-11-20 23:39:53,695 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_recv_slave_reply [2021-11-20 23:39:53,695 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_recv_slave_reply [2021-11-20 23:39:53,696 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_transfer [2021-11-20 23:39:53,696 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_transfer [2021-11-20 23:39:53,697 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-20 23:39:53,697 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-20 23:39:53,698 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~~u32~0~TO~int [2021-11-20 23:39:53,699 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~~u32~0~TO~int [2021-11-20 23:39:53,699 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_init [2021-11-20 23:39:53,699 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_init [2021-11-20 23:39:53,700 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-11-20 23:39:53,700 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-11-20 23:39:53,700 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~VOID [2021-11-20 23:39:53,701 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~VOID [2021-11-20 23:39:53,701 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_get_dmdlock [2021-11-20 23:39:53,701 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_get_dmdlock [2021-11-20 23:39:53,701 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:39:53,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 23:39:53,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:39:53,702 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_sleep [2021-11-20 23:39:53,703 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_sleep [2021-11-20 23:39:53,703 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_read_reg [2021-11-20 23:39:53,703 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_read_reg [2021-11-20 23:39:53,703 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_chk_signal [2021-11-20 23:39:53,703 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_chk_signal [2021-11-20 23:39:53,704 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-20 23:39:53,704 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-20 23:39:53,704 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 23:39:53,704 INFO L130 BoogieDeclarations]: Found specification of procedure comp2 [2021-11-20 23:39:53,705 INFO L138 BoogieDeclarations]: Found implementation of procedure comp2 [2021-11-20 23:39:53,706 INFO L130 BoogieDeclarations]: Found specification of procedure remove_dev [2021-11-20 23:39:53,706 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_dev [2021-11-20 23:39:53,706 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_search [2021-11-20 23:39:53,706 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_search [2021-11-20 23:39:53,706 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_write_reg [2021-11-20 23:39:53,707 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_write_reg [2021-11-20 23:39:53,707 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_frontend_algo [2021-11-20 23:39:53,707 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_frontend_algo [2021-11-20 23:39:53,707 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:39:53,707 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 23:39:53,708 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_read_status [2021-11-20 23:39:53,709 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_read_status [2021-11-20 23:39:53,709 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_set_vit_thtracq [2021-11-20 23:39:53,709 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_set_vit_thtracq [2021-11-20 23:39:53,709 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_chk_tmg [2021-11-20 23:39:53,710 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_chk_tmg [2021-11-20 23:39:53,711 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_read_cnr [2021-11-20 23:39:53,711 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_read_cnr [2021-11-20 23:39:53,711 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-20 23:39:53,712 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-20 23:39:53,712 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_set_srate [2021-11-20 23:39:53,712 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_set_srate [2021-11-20 23:39:53,713 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_activate_modcod_single [2021-11-20 23:39:53,713 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_activate_modcod_single [2021-11-20 23:39:53,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:39:53,713 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2021-11-20 23:39:53,713 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2021-11-20 23:39:53,714 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_mutex_unlock_tuner_lock [2021-11-20 23:39:53,714 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_mutex_unlock_tuner_lock [2021-11-20 23:39:53,714 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_get_viterbi [2021-11-20 23:39:53,714 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_get_viterbi [2021-11-20 23:39:53,714 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-20 23:39:53,715 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_get_mclk [2021-11-20 23:39:53,715 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_get_mclk [2021-11-20 23:39:53,715 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:39:53,716 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:39:53,716 INFO L130 BoogieDeclarations]: Found specification of procedure stv090x_get_lock_tmg [2021-11-20 23:39:53,717 INFO L138 BoogieDeclarations]: Found implementation of procedure stv090x_get_lock_tmg [2021-11-20 23:39:55,313 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:39:55,320 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:40:15,613 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:40:27,252 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:40:27,252 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-20 23:40:27,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:40:27 BoogieIcfgContainer [2021-11-20 23:40:27,267 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:40:27,270 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:40:27,270 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:40:27,275 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:40:27,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:39:47" (1/3) ... [2021-11-20 23:40:27,280 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71724adf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:40:27, skipping insertion in model container [2021-11-20 23:40:27,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:39:51" (2/3) ... [2021-11-20 23:40:27,281 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71724adf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:40:27, skipping insertion in model container [2021-11-20 23:40:27,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:40:27" (3/3) ... [2021-11-20 23:40:27,283 INFO L111 eAbstractionObserver]: Analyzing ICFG main0_drivers--media--dvb-frontends--stv090x-ko---32_7a--linux-3.7.3.i [2021-11-20 23:40:27,290 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:40:27,290 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:40:27,371 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:40:27,380 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 [2021-11-20 23:40:27,380 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:40:27,616 INFO L276 IsEmpty]: Start isEmpty. Operand has 4156 states, 2829 states have (on average 1.44220572640509) internal successors, (4080), 2843 states have internal predecessors, (4080), 1277 states have call successors, (1277), 48 states have call predecessors, (1277), 48 states have return successors, (1277), 1276 states have call predecessors, (1277), 1277 states have call successors, (1277) [2021-11-20 23:40:27,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-20 23:40:27,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:40:27,621 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-20 23:40:27,622 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:40:27,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:40:27,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1988632696, now seen corresponding path program 1 times [2021-11-20 23:40:27,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:40:27,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720464475] [2021-11-20 23:40:27,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:40:27,648 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:40:28,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:40:28,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:40:28,721 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:40:28,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720464475] [2021-11-20 23:40:28,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720464475] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:40:28,723 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:40:28,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:40:28,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726587807] [2021-11-20 23:40:28,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:40:28,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:40:28,732 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:40:28,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:40:28,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:40:28,790 INFO L87 Difference]: Start difference. First operand has 4156 states, 2829 states have (on average 1.44220572640509) internal successors, (4080), 2843 states have internal predecessors, (4080), 1277 states have call successors, (1277), 48 states have call predecessors, (1277), 48 states have return successors, (1277), 1276 states have call predecessors, (1277), 1277 states have call successors, (1277) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:31,114 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:40:33,313 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-20 23:40:35,836 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-20 23:40:37,875 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-20 23:40:40,382 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:40:40,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:40:40,718 INFO L93 Difference]: Finished difference Result 11270 states and 18067 transitions. [2021-11-20 23:40:40,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:40:40,722 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-20 23:40:40,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:40:40,845 INFO L225 Difference]: With dead ends: 11270 [2021-11-20 23:40:40,845 INFO L226 Difference]: Without dead ends: 7113 [2021-11-20 23:40:40,913 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 [2021-11-20 23:40:40,920 INFO L933 BasicCegarLoop]: 7302 mSDtfsCounter, 6273 mSDsluCounter, 5047 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6275 SdHoareTripleChecker+Valid, 12181 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:40:40,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6275 Valid, 12181 Invalid, 408 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [0 Valid, 405 Invalid, 3 Unknown, 0 Unchecked, 11.3s Time] [2021-11-20 23:40:40,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7113 states. [2021-11-20 23:40:42,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7113 to 7097. [2021-11-20 23:40:42,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7097 states, 4847 states have (on average 1.441510212502579) internal successors, (6987), 4864 states have internal predecessors, (6987), 2166 states have call successors, (2166), 84 states have call predecessors, (2166), 83 states have return successors, (2157), 2151 states have call predecessors, (2157), 2157 states have call successors, (2157) [2021-11-20 23:40:42,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7097 states to 7097 states and 11310 transitions. [2021-11-20 23:40:42,939 INFO L78 Accepts]: Start accepts. Automaton has 7097 states and 11310 transitions. Word has length 6 [2021-11-20 23:40:42,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:40:42,940 INFO L470 AbstractCegarLoop]: Abstraction has 7097 states and 11310 transitions. [2021-11-20 23:40:42,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:42,941 INFO L276 IsEmpty]: Start isEmpty. Operand 7097 states and 11310 transitions. [2021-11-20 23:40:42,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-20 23:40:42,943 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:40:42,943 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:40:42,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:40:42,944 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:40:42,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:40:42,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1515576348, now seen corresponding path program 1 times [2021-11-20 23:40:42,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:40:42,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741186842] [2021-11-20 23:40:42,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:40:42,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:40:43,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:40:43,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:40:43,634 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:40:43,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741186842] [2021-11-20 23:40:43,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741186842] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:40:43,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:40:43,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:40:43,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442938869] [2021-11-20 23:40:43,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:40:43,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:40:43,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:40:43,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:40:43,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:40:43,639 INFO L87 Difference]: Start difference. First operand 7097 states and 11310 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:47,608 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-20 23:40:52,255 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-20 23:40:55,022 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 23:40:55,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:40:55,466 INFO L93 Difference]: Finished difference Result 20659 states and 32948 transitions. [2021-11-20 23:40:55,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:40:55,468 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-11-20 23:40:55,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:40:55,658 INFO L225 Difference]: With dead ends: 20659 [2021-11-20 23:40:55,659 INFO L226 Difference]: Without dead ends: 13563 [2021-11-20 23:40:55,757 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 [2021-11-20 23:40:55,760 INFO L933 BasicCegarLoop]: 7503 mSDtfsCounter, 6391 mSDsluCounter, 6105 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 5 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6391 SdHoareTripleChecker+Valid, 13385 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:40:55,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6391 Valid, 13385 Invalid, 473 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5 Valid, 465 Invalid, 3 Unknown, 0 Unchecked, 11.1s Time] [2021-11-20 23:40:55,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13563 states. [2021-11-20 23:40:58,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13563 to 13558. [2021-11-20 23:40:58,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13558 states, 9283 states have (on average 1.4416675643649681) internal successors, (13383), 9309 states have internal predecessors, (13383), 4113 states have call successors, (4113), 164 states have call predecessors, (4113), 161 states have return successors, (4122), 4090 states have call predecessors, (4122), 4103 states have call successors, (4122) [2021-11-20 23:40:58,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13558 states to 13558 states and 21618 transitions. [2021-11-20 23:40:58,930 INFO L78 Accepts]: Start accepts. Automaton has 13558 states and 21618 transitions. Word has length 7 [2021-11-20 23:40:58,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:40:58,930 INFO L470 AbstractCegarLoop]: Abstraction has 13558 states and 21618 transitions. [2021-11-20 23:40:58,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:40:58,932 INFO L276 IsEmpty]: Start isEmpty. Operand 13558 states and 21618 transitions. [2021-11-20 23:40:58,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-20 23:40:58,933 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:40:58,933 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:40:58,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:40:58,934 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:40:58,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:40:58,935 INFO L85 PathProgramCache]: Analyzing trace with hash -264263685, now seen corresponding path program 1 times [2021-11-20 23:40:58,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:40:58,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77080376] [2021-11-20 23:40:58,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:40:58,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:40:59,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:40:59,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:40:59,473 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:40:59,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77080376] [2021-11-20 23:40:59,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77080376] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:40:59,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:40:59,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:40:59,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135059084] [2021-11-20 23:40:59,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:40:59,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:40:59,477 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:40:59,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:40:59,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:40:59,479 INFO L87 Difference]: Start difference. First operand 13558 states and 21618 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:41:01,875 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:41:04,043 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-20 23:41:06,265 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-20 23:41:08,272 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-20 23:41:11,867 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 23:41:12,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:41:12,239 INFO L93 Difference]: Finished difference Result 16433 states and 26073 transitions. [2021-11-20 23:41:12,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:41:12,240 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-20 23:41:12,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:41:12,416 INFO L225 Difference]: With dead ends: 16433 [2021-11-20 23:41:12,417 INFO L226 Difference]: Without dead ends: 16430 [2021-11-20 23:41:12,435 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 [2021-11-20 23:41:12,440 INFO L933 BasicCegarLoop]: 7318 mSDtfsCounter, 6540 mSDsluCounter, 5048 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6542 SdHoareTripleChecker+Valid, 12197 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:41:12,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6542 Valid, 12197 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 404 Invalid, 3 Unknown, 0 Unchecked, 12.3s Time] [2021-11-20 23:41:12,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16430 states. [2021-11-20 23:41:15,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16430 to 16405. [2021-11-20 23:41:15,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16405 states, 11245 states have (on average 1.4356602934637617) internal successors, (16144), 11280 states have internal predecessors, (16144), 4942 states have call successors, (4942), 220 states have call predecessors, (4942), 217 states have return successors, (4952), 4912 states have call predecessors, (4952), 4933 states have call successors, (4952) [2021-11-20 23:41:15,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16405 states to 16405 states and 26038 transitions. [2021-11-20 23:41:15,550 INFO L78 Accepts]: Start accepts. Automaton has 16405 states and 26038 transitions. Word has length 8 [2021-11-20 23:41:15,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:41:15,551 INFO L470 AbstractCegarLoop]: Abstraction has 16405 states and 26038 transitions. [2021-11-20 23:41:15,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:41:15,551 INFO L276 IsEmpty]: Start isEmpty. Operand 16405 states and 26038 transitions. [2021-11-20 23:41:15,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-20 23:41:15,552 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:41:15,553 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:41:15,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 23:41:15,553 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:41:15,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:41:15,554 INFO L85 PathProgramCache]: Analyzing trace with hash 395275007, now seen corresponding path program 1 times [2021-11-20 23:41:15,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:41:15,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493271950] [2021-11-20 23:41:15,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:41:15,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:41:15,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:41:16,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:41:16,073 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:41:16,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493271950] [2021-11-20 23:41:16,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493271950] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:41:16,078 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:41:16,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:41:16,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792096035] [2021-11-20 23:41:16,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:41:16,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:41:16,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:41:16,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:41:16,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:41:16,080 INFO L87 Difference]: Start difference. First operand 16405 states and 26038 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:41:18,329 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:41:20,573 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-20 23:41:23,060 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-20 23:41:25,854 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:41:26,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:41:26,214 INFO L93 Difference]: Finished difference Result 16462 states and 26107 transitions. [2021-11-20 23:41:26,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:41:26,215 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-20 23:41:26,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:41:26,329 INFO L225 Difference]: With dead ends: 16462 [2021-11-20 23:41:26,329 INFO L226 Difference]: Without dead ends: 16459 [2021-11-20 23:41:26,346 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 [2021-11-20 23:41:26,347 INFO L933 BasicCegarLoop]: 7297 mSDtfsCounter, 6311 mSDsluCounter, 5001 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6313 SdHoareTripleChecker+Valid, 12131 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:41:26,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6313 Valid, 12131 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 404 Invalid, 2 Unknown, 0 Unchecked, 9.8s Time] [2021-11-20 23:41:26,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16459 states. [2021-11-20 23:41:29,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16459 to 16434. [2021-11-20 23:41:29,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16434 states, 11265 states have (on average 1.435508211273857) internal successors, (16171), 11299 states have internal predecessors, (16171), 4945 states have call successors, (4945), 226 states have call predecessors, (4945), 223 states have return successors, (4956), 4916 states have call predecessors, (4956), 4937 states have call successors, (4956) [2021-11-20 23:41:29,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16434 states to 16434 states and 26072 transitions. [2021-11-20 23:41:29,651 INFO L78 Accepts]: Start accepts. Automaton has 16434 states and 26072 transitions. Word has length 9 [2021-11-20 23:41:29,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:41:29,651 INFO L470 AbstractCegarLoop]: Abstraction has 16434 states and 26072 transitions. [2021-11-20 23:41:29,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:41:29,652 INFO L276 IsEmpty]: Start isEmpty. Operand 16434 states and 26072 transitions. [2021-11-20 23:41:29,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-20 23:41:29,653 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:41:29,653 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:41:29,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 23:41:29,654 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:41:29,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:41:29,654 INFO L85 PathProgramCache]: Analyzing trace with hash -633857154, now seen corresponding path program 1 times [2021-11-20 23:41:29,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:41:29,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360524892] [2021-11-20 23:41:29,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:41:29,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:41:29,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:41:30,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:41:30,225 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:41:30,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360524892] [2021-11-20 23:41:30,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360524892] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:41:30,225 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:41:30,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:41:30,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691758945] [2021-11-20 23:41:30,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:41:30,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:41:30,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:41:30,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:41:30,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:41:30,227 INFO L87 Difference]: Start difference. First operand 16434 states and 26072 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:41:33,090 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:41:35,233 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-20 23:41:38,717 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 23:41:39,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:41:39,087 INFO L93 Difference]: Finished difference Result 16461 states and 26105 transitions. [2021-11-20 23:41:39,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:41:39,088 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-11-20 23:41:39,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:41:39,202 INFO L225 Difference]: With dead ends: 16461 [2021-11-20 23:41:39,202 INFO L226 Difference]: Without dead ends: 16458 [2021-11-20 23:41:39,224 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 [2021-11-20 23:41:39,226 INFO L933 BasicCegarLoop]: 7314 mSDtfsCounter, 6577 mSDsluCounter, 5001 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6582 SdHoareTripleChecker+Valid, 12148 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:41:39,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6582 Valid, 12148 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 402 Invalid, 3 Unknown, 0 Unchecked, 8.5s Time] [2021-11-20 23:41:39,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16458 states. [2021-11-20 23:41:42,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16458 to 16433. [2021-11-20 23:41:42,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16433 states, 11265 states have (on average 1.4354194407456724) internal successors, (16170), 11298 states have internal predecessors, (16170), 4944 states have call successors, (4944), 226 states have call predecessors, (4944), 223 states have return successors, (4956), 4916 states have call predecessors, (4956), 4937 states have call successors, (4956) [2021-11-20 23:41:42,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16433 states to 16433 states and 26070 transitions. [2021-11-20 23:41:42,185 INFO L78 Accepts]: Start accepts. Automaton has 16433 states and 26070 transitions. Word has length 10 [2021-11-20 23:41:42,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:41:42,185 INFO L470 AbstractCegarLoop]: Abstraction has 16433 states and 26070 transitions. [2021-11-20 23:41:42,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 23:41:42,187 INFO L276 IsEmpty]: Start isEmpty. Operand 16433 states and 26070 transitions. [2021-11-20 23:41:42,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 23:41:42,188 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:41:42,188 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:41:42,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 23:41:42,190 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:41:42,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:41:42,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1822789090, now seen corresponding path program 1 times [2021-11-20 23:41:42,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:41:42,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228328053] [2021-11-20 23:41:42,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:41:42,192 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:41:42,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:41:42,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 23:41:42,568 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:41:42,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228328053] [2021-11-20 23:41:42,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228328053] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:41:42,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:41:42,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 23:41:42,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952657685] [2021-11-20 23:41:42,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:41:42,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:41:42,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:41:42,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:41:42,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:41:42,571 INFO L87 Difference]: Start difference. First operand 16433 states and 26070 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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) [2021-11-20 23:41:45,620 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:41:49,011 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-20 23:41:51,468 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-20 23:41:52,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:41:52,958 INFO L93 Difference]: Finished difference Result 48469 states and 77388 transitions. [2021-11-20 23:41:52,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:41:52,960 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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 11 [2021-11-20 23:41:52,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:41:53,167 INFO L225 Difference]: With dead ends: 48469 [2021-11-20 23:41:53,167 INFO L226 Difference]: Without dead ends: 32031 [2021-11-20 23:41:53,334 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 [2021-11-20 23:41:53,336 INFO L933 BasicCegarLoop]: 7952 mSDtfsCounter, 6362 mSDsluCounter, 6636 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 4 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6362 SdHoareTripleChecker+Valid, 14355 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:41:53,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6362 Valid, 14355 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 493 Invalid, 2 Unknown, 0 Unchecked, 9.3s Time] [2021-11-20 23:41:53,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32031 states. [2021-11-20 23:42:00,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32031 to 32000. [2021-11-20 23:42:00,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32000 states, 21936 states have (on average 1.4358132749817651) internal successors, (31496), 21997 states have internal predecessors, (31496), 9631 states have call successors, (9631), 437 states have call predecessors, (9631), 432 states have return successors, (9954), 9581 states have call predecessors, (9954), 9622 states have call successors, (9954) [2021-11-20 23:42:00,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32000 states to 32000 states and 51081 transitions. [2021-11-20 23:42:00,601 INFO L78 Accepts]: Start accepts. Automaton has 32000 states and 51081 transitions. Word has length 11 [2021-11-20 23:42:00,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:42:00,601 INFO L470 AbstractCegarLoop]: Abstraction has 32000 states and 51081 transitions. [2021-11-20 23:42:00,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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) [2021-11-20 23:42:00,602 INFO L276 IsEmpty]: Start isEmpty. Operand 32000 states and 51081 transitions. [2021-11-20 23:42:00,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-20 23:42:00,616 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:42:00,617 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:42:00,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 23:42:00,617 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:42:00,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:42:00,618 INFO L85 PathProgramCache]: Analyzing trace with hash -668560186, now seen corresponding path program 1 times [2021-11-20 23:42:00,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:42:00,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486501612] [2021-11-20 23:42:00,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:42:00,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:42:00,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:42:01,147 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:42:01,148 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:42:01,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486501612] [2021-11-20 23:42:01,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486501612] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:42:01,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:42:01,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:42:01,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964551919] [2021-11-20 23:42:01,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:42:01,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:42:01,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:42:01,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:42:01,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:42:01,152 INFO L87 Difference]: Start difference. First operand 32000 states and 51081 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 23:42:05,263 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:42:06,317 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:42:08,523 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-20 23:42:10,650 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-20 23:42:12,828 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-20 23:42:15,009 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-20 23:42:17,711 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-20 23:42:20,763 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 23:42:22,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:42:22,103 INFO L93 Difference]: Finished difference Result 64385 states and 103023 transitions. [2021-11-20 23:42:22,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:42:22,104 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 53 [2021-11-20 23:42:22,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:42:22,263 INFO L225 Difference]: With dead ends: 64385 [2021-11-20 23:42:22,263 INFO L226 Difference]: Without dead ends: 32386 [2021-11-20 23:42:22,697 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 [2021-11-20 23:42:22,699 INFO L933 BasicCegarLoop]: 6372 mSDtfsCounter, 61 mSDsluCounter, 13157 mSDsCounter, 0 mSdLazyCounter, 761 mSolverCounterSat, 31 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 19065 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 761 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:42:22,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 19065 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 761 Invalid, 6 Unknown, 0 Unchecked, 19.2s Time] [2021-11-20 23:42:22,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32386 states. [2021-11-20 23:42:27,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32386 to 32384. [2021-11-20 23:42:27,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32384 states, 22218 states have (on average 1.4332523179404086) internal successors, (31844), 22279 states have internal predecessors, (31844), 9721 states have call successors, (9721), 449 states have call predecessors, (9721), 444 states have return successors, (10044), 9671 states have call predecessors, (10044), 9712 states have call successors, (10044) [2021-11-20 23:42:27,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32384 states to 32384 states and 51609 transitions. [2021-11-20 23:42:27,824 INFO L78 Accepts]: Start accepts. Automaton has 32384 states and 51609 transitions. Word has length 53 [2021-11-20 23:42:27,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:42:27,825 INFO L470 AbstractCegarLoop]: Abstraction has 32384 states and 51609 transitions. [2021-11-20 23:42:27,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-20 23:42:27,826 INFO L276 IsEmpty]: Start isEmpty. Operand 32384 states and 51609 transitions. [2021-11-20 23:42:27,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-20 23:42:27,831 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:42:27,832 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:42:27,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 23:42:27,832 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:42:27,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:42:27,833 INFO L85 PathProgramCache]: Analyzing trace with hash 527686513, now seen corresponding path program 1 times [2021-11-20 23:42:27,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:42:27,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417232536] [2021-11-20 23:42:27,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:42:27,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:42:28,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:42:28,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:42:28,332 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:42:28,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417232536] [2021-11-20 23:42:28,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417232536] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:42:28,333 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:42:28,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:42:28,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120693043] [2021-11-20 23:42:28,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:42:28,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:42:28,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:42:28,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:42:28,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:42:28,335 INFO L87 Difference]: Start difference. First operand 32384 states and 51609 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 23:42:30,673 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:42:32,377 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:42:34,657 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-20 23:42:38,295 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 23:42:38,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:42:38,763 INFO L93 Difference]: Finished difference Result 32491 states and 51737 transitions. [2021-11-20 23:42:38,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:42:38,764 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 54 [2021-11-20 23:42:38,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:42:38,906 INFO L225 Difference]: With dead ends: 32491 [2021-11-20 23:42:38,907 INFO L226 Difference]: Without dead ends: 32488 [2021-11-20 23:42:38,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:42:38,929 INFO L933 BasicCegarLoop]: 6388 mSDtfsCounter, 224 mSDsluCounter, 6401 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 12565 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2021-11-20 23:42:38,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 12565 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 472 Invalid, 2 Unknown, 0 Unchecked, 9.5s Time] [2021-11-20 23:42:38,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32488 states. [2021-11-20 23:42:43,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32488 to 32488. [2021-11-20 23:42:43,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32488 states, 22286 states have (on average 1.4327380418199767) internal successors, (31930), 22347 states have internal predecessors, (31930), 9739 states have call successors, (9739), 469 states have call predecessors, (9739), 462 states have return successors, (10062), 9687 states have call predecessors, (10062), 9730 states have call successors, (10062) [2021-11-20 23:42:44,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32488 states to 32488 states and 51731 transitions. [2021-11-20 23:42:44,013 INFO L78 Accepts]: Start accepts. Automaton has 32488 states and 51731 transitions. Word has length 54 [2021-11-20 23:42:44,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:42:44,014 INFO L470 AbstractCegarLoop]: Abstraction has 32488 states and 51731 transitions. [2021-11-20 23:42:44,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 23:42:44,014 INFO L276 IsEmpty]: Start isEmpty. Operand 32488 states and 51731 transitions. [2021-11-20 23:42:44,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-20 23:42:44,020 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:42:44,020 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:42:44,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 23:42:44,021 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:42:44,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:42:44,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1497344284, now seen corresponding path program 1 times [2021-11-20 23:42:44,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:42:44,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370150593] [2021-11-20 23:42:44,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:42:44,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:42:47,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:42:48,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:42:48,003 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:42:48,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370150593] [2021-11-20 23:42:48,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370150593] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:42:48,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:42:48,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:42:48,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223743784] [2021-11-20 23:42:48,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:42:48,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:42:48,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:42:48,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:42:48,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:42:48,006 INFO L87 Difference]: Start difference. First operand 32488 states and 51731 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 23:42:49,420 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:42:51,578 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:42:54,531 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-20 23:42:58,405 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 23:42:59,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:42:59,123 INFO L93 Difference]: Finished difference Result 64995 states and 110161 transitions. [2021-11-20 23:42:59,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:42:59,124 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 58 [2021-11-20 23:42:59,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:42:59,260 INFO L225 Difference]: With dead ends: 64995 [2021-11-20 23:42:59,261 INFO L226 Difference]: Without dead ends: 32508 [2021-11-20 23:42:59,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:42:59,507 INFO L933 BasicCegarLoop]: 6375 mSDtfsCounter, 0 mSDsluCounter, 6606 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 12747 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:42:59,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 12747 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 474 Invalid, 2 Unknown, 0 Unchecked, 9.8s Time] [2021-11-20 23:42:59,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32508 states. [2021-11-20 23:43:03,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32508 to 32508. [2021-11-20 23:43:03,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32508 states, 22306 states have (on average 1.4323500403478884) internal successors, (31950), 22367 states have internal predecessors, (31950), 9739 states have call successors, (9739), 469 states have call predecessors, (9739), 462 states have return successors, (10062), 9687 states have call predecessors, (10062), 9730 states have call successors, (10062) [2021-11-20 23:43:04,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32508 states to 32508 states and 51751 transitions. [2021-11-20 23:43:04,152 INFO L78 Accepts]: Start accepts. Automaton has 32508 states and 51751 transitions. Word has length 58 [2021-11-20 23:43:04,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:43:04,153 INFO L470 AbstractCegarLoop]: Abstraction has 32508 states and 51751 transitions. [2021-11-20 23:43:04,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 23:43:04,154 INFO L276 IsEmpty]: Start isEmpty. Operand 32508 states and 51751 transitions. [2021-11-20 23:43:04,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-20 23:43:04,158 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:43:04,159 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:43:04,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 23:43:04,159 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:43:04,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:43:04,160 INFO L85 PathProgramCache]: Analyzing trace with hash 31037608, now seen corresponding path program 1 times [2021-11-20 23:43:04,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:43:04,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657100525] [2021-11-20 23:43:04,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:43:04,160 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:43:06,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:43:07,159 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:43:07,160 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:43:07,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657100525] [2021-11-20 23:43:07,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657100525] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:43:07,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:43:07,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:43:07,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566840046] [2021-11-20 23:43:07,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:43:07,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:43:07,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:43:07,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:43:07,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:43:07,164 INFO L87 Difference]: Start difference. First operand 32508 states and 51751 transitions. Second operand has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 23:43:10,823 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:43:11,990 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:43:14,214 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-20 23:43:16,347 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-20 23:43:20,081 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-20 23:43:20,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:43:20,905 INFO L93 Difference]: Finished difference Result 65035 states and 110201 transitions. [2021-11-20 23:43:20,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:43:20,906 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 59 [2021-11-20 23:43:20,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:43:21,145 INFO L225 Difference]: With dead ends: 65035 [2021-11-20 23:43:21,145 INFO L226 Difference]: Without dead ends: 32528 [2021-11-20 23:43:21,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:43:21,459 INFO L933 BasicCegarLoop]: 6373 mSDtfsCounter, 10 mSDsluCounter, 6604 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12743 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:43:21,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 12743 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 477 Invalid, 3 Unknown, 0 Unchecked, 12.4s Time] [2021-11-20 23:43:21,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32528 states. [2021-11-20 23:43:25,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32528 to 32528. [2021-11-20 23:43:25,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32528 states, 22326 states have (on average 1.4319627340320702) internal successors, (31970), 22387 states have internal predecessors, (31970), 9739 states have call successors, (9739), 469 states have call predecessors, (9739), 462 states have return successors, (10062), 9687 states have call predecessors, (10062), 9730 states have call successors, (10062) [2021-11-20 23:43:25,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32528 states to 32528 states and 51771 transitions. [2021-11-20 23:43:26,001 INFO L78 Accepts]: Start accepts. Automaton has 32528 states and 51771 transitions. Word has length 59 [2021-11-20 23:43:26,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:43:26,002 INFO L470 AbstractCegarLoop]: Abstraction has 32528 states and 51771 transitions. [2021-11-20 23:43:26,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 23:43:26,003 INFO L276 IsEmpty]: Start isEmpty. Operand 32528 states and 51771 transitions. [2021-11-20 23:43:26,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-20 23:43:26,009 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:43:26,010 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:43:26,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-20 23:43:26,010 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:43:26,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:43:26,011 INFO L85 PathProgramCache]: Analyzing trace with hash 972261690, now seen corresponding path program 1 times [2021-11-20 23:43:26,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:43:26,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466674134] [2021-11-20 23:43:26,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:43:26,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms