./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-commit-tester/m0_drivers-media-video-cx88-cx88-dvb-ko--32_7a--d47b389.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6af8b3c6-cb27-443c-9a32-68f79c509e71/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6af8b3c6-cb27-443c-9a32-68f79c509e71/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6af8b3c6-cb27-443c-9a32-68f79c509e71/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6af8b3c6-cb27-443c-9a32-68f79c509e71/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-commit-tester/m0_drivers-media-video-cx88-cx88-dvb-ko--32_7a--d47b389.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6af8b3c6-cb27-443c-9a32-68f79c509e71/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6af8b3c6-cb27-443c-9a32-68f79c509e71/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash efa92cfb99ddf37faa5e05d118bbca018e76e6d1ade87f7958feff968c230276 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:22:08,139 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:22:08,141 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:22:08,174 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:22:08,175 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:22:08,176 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:22:08,178 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:22:08,180 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:22:08,182 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:22:08,183 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:22:08,185 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:22:08,186 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:22:08,187 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:22:08,188 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:22:08,190 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:22:08,191 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:22:08,192 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:22:08,193 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:22:08,195 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:22:08,198 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:22:08,200 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:22:08,201 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:22:08,203 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:22:08,204 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:22:08,208 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:22:08,208 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:22:08,209 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:22:08,210 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:22:08,211 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:22:08,212 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:22:08,212 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:22:08,213 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:22:08,214 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:22:08,215 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:22:08,216 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:22:08,216 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:22:08,217 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:22:08,218 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:22:08,218 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:22:08,219 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:22:08,225 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:22:08,227 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6af8b3c6-cb27-443c-9a32-68f79c509e71/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-23 02:22:08,272 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:22:08,272 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:22:08,273 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:22:08,273 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:22:08,280 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:22:08,281 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:22:08,281 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:22:08,281 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:22:08,282 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:22:08,282 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:22:08,283 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:22:08,283 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:22:08,283 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:22:08,284 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:22:08,284 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:22:08,284 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:22:08,284 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:22:08,285 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:22:08,285 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:22:08,286 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:22:08,286 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:22:08,286 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:22:08,286 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:22:08,287 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:22:08,287 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:22:08,287 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:22:08,289 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:22:08,290 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:22:08,290 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:22:08,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:22:08,290 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:22:08,291 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:22:08,291 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:22:08,291 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:22:08,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:22:08,292 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:22:08,292 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:22:08,292 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:22:08,292 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_6af8b3c6-cb27-443c-9a32-68f79c509e71/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6af8b3c6-cb27-443c-9a32-68f79c509e71/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> efa92cfb99ddf37faa5e05d118bbca018e76e6d1ade87f7958feff968c230276 [2021-11-23 02:22:08,548 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:22:08,578 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:22:08,580 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:22:08,581 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:22:08,582 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:22:08,584 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6af8b3c6-cb27-443c-9a32-68f79c509e71/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-commit-tester/m0_drivers-media-video-cx88-cx88-dvb-ko--32_7a--d47b389.i [2021-11-23 02:22:08,680 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6af8b3c6-cb27-443c-9a32-68f79c509e71/bin/utaipan-EQgc7hIp5V/data/4e2abbc6e/a060f6e0efde420ea121670a6147ca8a/FLAG20ef4742a [2021-11-23 02:22:09,587 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:22:09,588 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6af8b3c6-cb27-443c-9a32-68f79c509e71/sv-benchmarks/c/ldv-commit-tester/m0_drivers-media-video-cx88-cx88-dvb-ko--32_7a--d47b389.i [2021-11-23 02:22:09,635 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6af8b3c6-cb27-443c-9a32-68f79c509e71/bin/utaipan-EQgc7hIp5V/data/4e2abbc6e/a060f6e0efde420ea121670a6147ca8a/FLAG20ef4742a [2021-11-23 02:22:10,023 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6af8b3c6-cb27-443c-9a32-68f79c509e71/bin/utaipan-EQgc7hIp5V/data/4e2abbc6e/a060f6e0efde420ea121670a6147ca8a [2021-11-23 02:22:10,025 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:22:10,026 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:22:10,030 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:22:10,030 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:22:10,032 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:22:10,033 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:22:10" (1/1) ... [2021-11-23 02:22:10,034 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8b53556 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:22:10, skipping insertion in model container [2021-11-23 02:22:10,034 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:22:10" (1/1) ... [2021-11-23 02:22:10,041 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:22:10,212 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:22:12,140 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_6af8b3c6-cb27-443c-9a32-68f79c509e71/sv-benchmarks/c/ldv-commit-tester/m0_drivers-media-video-cx88-cx88-dvb-ko--32_7a--d47b389.i[404095,404108] [2021-11-23 02:22:12,318 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:22:12,349 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:22:12,884 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_6af8b3c6-cb27-443c-9a32-68f79c509e71/sv-benchmarks/c/ldv-commit-tester/m0_drivers-media-video-cx88-cx88-dvb-ko--32_7a--d47b389.i[404095,404108] [2021-11-23 02:22:12,907 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:22:13,042 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:22:13,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:22:13 WrapperNode [2021-11-23 02:22:13,044 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:22:13,045 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:22:13,045 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:22:13,045 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:22:13,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:22:13" (1/1) ... [2021-11-23 02:22:13,182 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:22:13" (1/1) ... [2021-11-23 02:22:13,383 INFO L137 Inliner]: procedures = 167, calls = 2343, calls flagged for inlining = 49, calls inlined = 38, statements flattened = 5030 [2021-11-23 02:22:13,384 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:22:13,385 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:22:13,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:22:13,386 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:22:13,402 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:22:13" (1/1) ... [2021-11-23 02:22:13,403 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:22:13" (1/1) ... [2021-11-23 02:22:13,457 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:22:13" (1/1) ... [2021-11-23 02:22:13,468 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:22:13" (1/1) ... [2021-11-23 02:22:13,606 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:22:13" (1/1) ... [2021-11-23 02:22:13,627 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:22:13" (1/1) ... [2021-11-23 02:22:13,657 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:22:13" (1/1) ... [2021-11-23 02:22:13,700 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:22:13,701 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:22:13,702 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:22:13,702 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:22:13,703 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:22:13" (1/1) ... [2021-11-23 02:22:13,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:22:13,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6af8b3c6-cb27-443c-9a32-68f79c509e71/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:22:13,740 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6af8b3c6-cb27-443c-9a32-68f79c509e71/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:22:13,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6af8b3c6-cb27-443c-9a32-68f79c509e71/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:22:13,791 INFO L130 BoogieDeclarations]: Found specification of procedure cx8802_dvb_remove [2021-11-23 02:22:13,791 INFO L138 BoogieDeclarations]: Found implementation of procedure cx8802_dvb_remove [2021-11-23 02:22:13,792 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2021-11-23 02:22:13,792 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2021-11-23 02:22:13,792 INFO L130 BoogieDeclarations]: Found specification of procedure dntv_live_dvbt_demod_init [2021-11-23 02:22:13,792 INFO L138 BoogieDeclarations]: Found implementation of procedure dntv_live_dvbt_demod_init [2021-11-23 02:22:13,792 INFO L130 BoogieDeclarations]: Found specification of procedure msleep [2021-11-23 02:22:13,793 INFO L138 BoogieDeclarations]: Found implementation of procedure msleep [2021-11-23 02:22:13,793 INFO L130 BoogieDeclarations]: Found specification of procedure cx8802_dvb_advise_release [2021-11-23 02:22:13,793 INFO L138 BoogieDeclarations]: Found implementation of procedure cx8802_dvb_advise_release [2021-11-23 02:22:13,793 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 02:22:13,793 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~~u8~0~TO~$Pointer$ [2021-11-23 02:22:13,793 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~~u8~0~TO~$Pointer$ [2021-11-23 02:22:13,794 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~$Pointer$ [2021-11-23 02:22:13,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~$Pointer$ [2021-11-23 02:22:13,794 INFO L130 BoogieDeclarations]: Found specification of procedure stv0299_writereg [2021-11-23 02:22:13,794 INFO L138 BoogieDeclarations]: Found implementation of procedure stv0299_writereg [2021-11-23 02:22:13,794 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-23 02:22:13,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-23 02:22:13,795 INFO L130 BoogieDeclarations]: Found specification of procedure attach_xc3028 [2021-11-23 02:22:13,795 INFO L138 BoogieDeclarations]: Found implementation of procedure attach_xc3028 [2021-11-23 02:22:13,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 02:22:13,795 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-23 02:22:13,795 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-23 02:22:13,796 INFO L130 BoogieDeclarations]: Found specification of procedure stb6100_get_freq [2021-11-23 02:22:13,796 INFO L138 BoogieDeclarations]: Found implementation of procedure stb6100_get_freq [2021-11-23 02:22:13,796 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-23 02:22:13,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-23 02:22:13,796 INFO L130 BoogieDeclarations]: Found specification of procedure dvico_fusionhdtv_demod_init [2021-11-23 02:22:13,796 INFO L138 BoogieDeclarations]: Found implementation of procedure dvico_fusionhdtv_demod_init [2021-11-23 02:22:13,797 INFO L130 BoogieDeclarations]: Found specification of procedure stv0900_set_ts_param [2021-11-23 02:22:13,797 INFO L138 BoogieDeclarations]: Found implementation of procedure stv0900_set_ts_param [2021-11-23 02:22:13,797 INFO L130 BoogieDeclarations]: Found specification of procedure i2c_transfer [2021-11-23 02:22:13,797 INFO L138 BoogieDeclarations]: Found implementation of procedure i2c_transfer [2021-11-23 02:22:13,797 INFO L130 BoogieDeclarations]: Found specification of procedure samsung_smt_7020_tuner_set_params [2021-11-23 02:22:13,798 INFO L138 BoogieDeclarations]: Found implementation of procedure samsung_smt_7020_tuner_set_params [2021-11-23 02:22:13,798 INFO L130 BoogieDeclarations]: Found specification of procedure __symbol_put [2021-11-23 02:22:13,798 INFO L138 BoogieDeclarations]: Found implementation of procedure __symbol_put [2021-11-23 02:22:13,798 INFO L130 BoogieDeclarations]: Found specification of procedure cx88_dvb_gate_ctrl [2021-11-23 02:22:13,798 INFO L138 BoogieDeclarations]: Found implementation of procedure cx88_dvb_gate_ctrl [2021-11-23 02:22:13,798 INFO L130 BoogieDeclarations]: Found specification of procedure cx24116_set_ts_param [2021-11-23 02:22:13,799 INFO L138 BoogieDeclarations]: Found implementation of procedure cx24116_set_ts_param [2021-11-23 02:22:13,799 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_buf_prepare [2021-11-23 02:22:13,799 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_buf_prepare [2021-11-23 02:22:13,799 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:22:13,800 INFO L130 BoogieDeclarations]: Found specification of procedure cx8802_dvb_advise_acquire [2021-11-23 02:22:13,800 INFO L138 BoogieDeclarations]: Found implementation of procedure cx8802_dvb_advise_acquire [2021-11-23 02:22:13,800 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-11-23 02:22:13,800 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-11-23 02:22:13,801 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~VOID [2021-11-23 02:22:13,802 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~VOID [2021-11-23 02:22:13,802 INFO L130 BoogieDeclarations]: Found specification of procedure cx88_dvb_bus_ctrl [2021-11-23 02:22:13,803 INFO L138 BoogieDeclarations]: Found implementation of procedure cx88_dvb_bus_ctrl [2021-11-23 02:22:13,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:22:13,803 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~$Pointer$~TO~int [2021-11-23 02:22:13,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~$Pointer$~TO~int [2021-11-23 02:22:13,804 INFO L130 BoogieDeclarations]: Found specification of procedure __const_udelay [2021-11-23 02:22:13,804 INFO L138 BoogieDeclarations]: Found implementation of procedure __const_udelay [2021-11-23 02:22:13,804 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 02:22:13,804 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:22:13,805 INFO L130 BoogieDeclarations]: Found specification of procedure mt352_write [2021-11-23 02:22:13,805 INFO L138 BoogieDeclarations]: Found implementation of procedure mt352_write [2021-11-23 02:22:13,805 INFO L130 BoogieDeclarations]: Found specification of procedure nxt200x_set_ts_param [2021-11-23 02:22:13,805 INFO L138 BoogieDeclarations]: Found implementation of procedure nxt200x_set_ts_param [2021-11-23 02:22:13,805 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~int [2021-11-23 02:22:13,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~int [2021-11-23 02:22:13,806 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:22:13,806 INFO L130 BoogieDeclarations]: Found specification of procedure __symbol_get [2021-11-23 02:22:13,806 INFO L138 BoogieDeclarations]: Found implementation of procedure __symbol_get [2021-11-23 02:22:13,806 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2021-11-23 02:22:13,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2021-11-23 02:22:13,807 INFO L130 BoogieDeclarations]: Found specification of procedure or51132_set_ts_param [2021-11-23 02:22:13,807 INFO L138 BoogieDeclarations]: Found implementation of procedure or51132_set_ts_param [2021-11-23 02:22:13,807 INFO L130 BoogieDeclarations]: Found specification of procedure cx8802_dvb_probe [2021-11-23 02:22:13,807 INFO L138 BoogieDeclarations]: Found implementation of procedure cx8802_dvb_probe [2021-11-23 02:22:13,807 INFO L130 BoogieDeclarations]: Found specification of procedure videobuf_dvb_get_frontend [2021-11-23 02:22:13,807 INFO L138 BoogieDeclarations]: Found implementation of procedure videobuf_dvb_get_frontend [2021-11-23 02:22:13,808 INFO L130 BoogieDeclarations]: Found specification of procedure cx24116_reset_device [2021-11-23 02:22:13,808 INFO L138 BoogieDeclarations]: Found implementation of procedure cx24116_reset_device [2021-11-23 02:22:13,809 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~$Pointer$~X~int~TO~$Pointer$ [2021-11-23 02:22:13,809 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~$Pointer$~X~int~TO~$Pointer$ [2021-11-23 02:22:13,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:22:13,810 INFO L130 BoogieDeclarations]: Found specification of procedure dvico_dual_demod_init [2021-11-23 02:22:13,810 INFO L138 BoogieDeclarations]: Found implementation of procedure dvico_dual_demod_init [2021-11-23 02:22:13,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:22:13,810 INFO L130 BoogieDeclarations]: Found specification of procedure dntv_live_dvbt_pro_demod_init [2021-11-23 02:22:13,811 INFO L138 BoogieDeclarations]: Found implementation of procedure dntv_live_dvbt_pro_demod_init [2021-11-23 02:22:13,811 INFO L130 BoogieDeclarations]: Found specification of procedure stb6100_get_bandw [2021-11-23 02:22:13,812 INFO L138 BoogieDeclarations]: Found implementation of procedure stb6100_get_bandw [2021-11-23 02:22:13,812 INFO L130 BoogieDeclarations]: Found specification of procedure cx24123_set_ts_param [2021-11-23 02:22:13,812 INFO L138 BoogieDeclarations]: Found implementation of procedure cx24123_set_ts_param [2021-11-23 02:22:13,812 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-23 02:22:13,812 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-23 02:22:13,813 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~~u8~0~X~int~TO~$Pointer$ [2021-11-23 02:22:13,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~~u8~0~X~int~TO~$Pointer$ [2021-11-23 02:22:13,814 INFO L130 BoogieDeclarations]: Found specification of procedure lgdt330x_set_ts_param [2021-11-23 02:22:13,814 INFO L138 BoogieDeclarations]: Found implementation of procedure lgdt330x_set_ts_param [2021-11-23 02:22:13,814 INFO L130 BoogieDeclarations]: Found specification of procedure dvb_register [2021-11-23 02:22:13,814 INFO L138 BoogieDeclarations]: Found implementation of procedure dvb_register [2021-11-23 02:22:13,814 INFO L130 BoogieDeclarations]: Found specification of procedure readl [2021-11-23 02:22:13,814 INFO L138 BoogieDeclarations]: Found implementation of procedure readl [2021-11-23 02:22:13,815 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~~u8~0~X~~u8~0~X~~u8~0~TO~$Pointer$ [2021-11-23 02:22:13,815 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~~u8~0~X~~u8~0~X~~u8~0~TO~$Pointer$ [2021-11-23 02:22:13,815 INFO L130 BoogieDeclarations]: Found specification of procedure videobuf_dvb_dealloc_frontends [2021-11-23 02:22:13,815 INFO L138 BoogieDeclarations]: Found implementation of procedure videobuf_dvb_dealloc_frontends [2021-11-23 02:22:13,816 INFO L130 BoogieDeclarations]: Found specification of procedure writel [2021-11-23 02:22:13,816 INFO L138 BoogieDeclarations]: Found implementation of procedure writel [2021-11-23 02:22:13,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:22:13,816 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2021-11-23 02:22:13,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2021-11-23 02:22:13,817 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:22:13,818 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:22:13,820 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~TO~$Pointer$ [2021-11-23 02:22:13,820 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~$Pointer$~TO~$Pointer$ [2021-11-23 02:22:14,942 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:22:14,947 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:22:23,990 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:22:24,816 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:22:24,818 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 02:22:24,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:22:24 BoogieIcfgContainer [2021-11-23 02:22:24,827 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:22:24,839 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:22:24,839 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:22:24,843 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:22:24,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:22:10" (1/3) ... [2021-11-23 02:22:24,844 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@477fd2eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:22:24, skipping insertion in model container [2021-11-23 02:22:24,844 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:22:13" (2/3) ... [2021-11-23 02:22:24,845 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@477fd2eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:22:24, skipping insertion in model container [2021-11-23 02:22:24,845 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:22:24" (3/3) ... [2021-11-23 02:22:24,846 INFO L111 eAbstractionObserver]: Analyzing ICFG m0_drivers-media-video-cx88-cx88-dvb-ko--32_7a--d47b389.i [2021-11-23 02:22:24,852 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:22:24,852 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 02:22:24,929 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:22:24,939 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:22:24,939 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 02:22:25,015 INFO L276 IsEmpty]: Start isEmpty. Operand has 1756 states, 1115 states have (on average 1.389237668161435) internal successors, (1549), 1208 states have internal predecessors, (1549), 588 states have call successors, (588), 51 states have call predecessors, (588), 51 states have return successors, (588), 587 states have call predecessors, (588), 588 states have call successors, (588) [2021-11-23 02:22:25,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-23 02:22:25,020 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:22:25,021 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:22:25,022 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:22:25,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:22:25,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1019759944, now seen corresponding path program 1 times [2021-11-23 02:22:25,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:22:25,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51786408] [2021-11-23 02:22:25,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:22:25,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:22:25,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:22:25,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:22:25,708 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:22:25,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51786408] [2021-11-23 02:22:25,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51786408] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:22:25,710 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:22:25,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:22:25,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386030099] [2021-11-23 02:22:25,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:22:25,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:22:25,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:22:25,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:22:25,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:22:25,761 INFO L87 Difference]: Start difference. First operand has 1756 states, 1115 states have (on average 1.389237668161435) internal successors, (1549), 1208 states have internal predecessors, (1549), 588 states have call successors, (588), 51 states have call predecessors, (588), 51 states have return successors, (588), 587 states have call predecessors, (588), 588 states have call successors, (588) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:22:27,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:22:27,097 INFO L93 Difference]: Finished difference Result 5065 states and 7900 transitions. [2021-11-23 02:22:27,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:22:27,100 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2021-11-23 02:22:27,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:22:27,153 INFO L225 Difference]: With dead ends: 5065 [2021-11-23 02:22:27,153 INFO L226 Difference]: Without dead ends: 3311 [2021-11-23 02:22:27,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:22:27,170 INFO L933 BasicCegarLoop]: 3144 mSDtfsCounter, 2666 mSDsluCounter, 2456 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2666 SdHoareTripleChecker+Valid, 5516 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:22:27,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2666 Valid, 5516 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 02:22:27,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3311 states. [2021-11-23 02:22:27,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3311 to 3308. [2021-11-23 02:22:27,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3308 states, 2118 states have (on average 1.3833805476864967) internal successors, (2930), 2291 states have internal predecessors, (2930), 1093 states have call successors, (1093), 96 states have call predecessors, (1093), 96 states have return successors, (1106), 1088 states have call predecessors, (1106), 1087 states have call successors, (1106) [2021-11-23 02:22:27,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3308 states to 3308 states and 5129 transitions. [2021-11-23 02:22:27,785 INFO L78 Accepts]: Start accepts. Automaton has 3308 states and 5129 transitions. Word has length 10 [2021-11-23 02:22:27,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:22:27,786 INFO L470 AbstractCegarLoop]: Abstraction has 3308 states and 5129 transitions. [2021-11-23 02:22:27,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:22:27,788 INFO L276 IsEmpty]: Start isEmpty. Operand 3308 states and 5129 transitions. [2021-11-23 02:22:27,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-23 02:22:27,790 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:22:27,790 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:22:27,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:22:27,792 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:22:27,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:22:27,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1546689107, now seen corresponding path program 1 times [2021-11-23 02:22:27,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:22:27,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117164459] [2021-11-23 02:22:27,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:22:27,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:22:27,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:22:28,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:22:28,105 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:22:28,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117164459] [2021-11-23 02:22:28,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117164459] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:22:28,106 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:22:28,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:22:28,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366994623] [2021-11-23 02:22:28,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:22:28,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:22:28,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:22:28,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:22:28,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:22:28,110 INFO L87 Difference]: Start difference. First operand 3308 states and 5129 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:22:28,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:22:28,729 INFO L93 Difference]: Finished difference Result 3310 states and 5130 transitions. [2021-11-23 02:22:28,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:22:28,730 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-11-23 02:22:28,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:22:28,757 INFO L225 Difference]: With dead ends: 3310 [2021-11-23 02:22:28,758 INFO L226 Difference]: Without dead ends: 3307 [2021-11-23 02:22:28,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:22:28,762 INFO L933 BasicCegarLoop]: 2611 mSDtfsCounter, 2705 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2705 SdHoareTripleChecker+Valid, 2611 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:22:28,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2705 Valid, 2611 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:22:28,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3307 states. [2021-11-23 02:22:29,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3307 to 3307. [2021-11-23 02:22:29,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3307 states, 2118 states have (on average 1.3829084041548632) internal successors, (2929), 2290 states have internal predecessors, (2929), 1092 states have call successors, (1092), 96 states have call predecessors, (1092), 96 states have return successors, (1106), 1088 states have call predecessors, (1106), 1087 states have call successors, (1106) [2021-11-23 02:22:29,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3307 states to 3307 states and 5127 transitions. [2021-11-23 02:22:29,037 INFO L78 Accepts]: Start accepts. Automaton has 3307 states and 5127 transitions. Word has length 11 [2021-11-23 02:22:29,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:22:29,038 INFO L470 AbstractCegarLoop]: Abstraction has 3307 states and 5127 transitions. [2021-11-23 02:22:29,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:22:29,039 INFO L276 IsEmpty]: Start isEmpty. Operand 3307 states and 5127 transitions. [2021-11-23 02:22:29,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-23 02:22:29,039 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:22:29,040 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:22:29,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:22:29,040 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:22:29,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:22:29,041 INFO L85 PathProgramCache]: Analyzing trace with hash 701628843, now seen corresponding path program 1 times [2021-11-23 02:22:29,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:22:29,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062653656] [2021-11-23 02:22:29,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:22:29,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:22:29,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:22:29,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:22:29,367 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:22:29,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062653656] [2021-11-23 02:22:29,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062653656] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:22:29,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:22:29,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:22:29,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460344580] [2021-11-23 02:22:29,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:22:29,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:22:29,374 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:22:29,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:22:29,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:22:29,376 INFO L87 Difference]: Start difference. First operand 3307 states and 5127 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:22:29,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:22:29,933 INFO L93 Difference]: Finished difference Result 3309 states and 5128 transitions. [2021-11-23 02:22:29,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:22:29,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-11-23 02:22:29,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:22:29,960 INFO L225 Difference]: With dead ends: 3309 [2021-11-23 02:22:29,961 INFO L226 Difference]: Without dead ends: 3306 [2021-11-23 02:22:29,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:22:29,965 INFO L933 BasicCegarLoop]: 2609 mSDtfsCounter, 2702 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2702 SdHoareTripleChecker+Valid, 2609 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:22:29,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2702 Valid, 2609 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:22:29,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3306 states. [2021-11-23 02:22:30,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3306 to 3306. [2021-11-23 02:22:30,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3306 states, 2118 states have (on average 1.3824362606232294) internal successors, (2928), 2289 states have internal predecessors, (2928), 1091 states have call successors, (1091), 96 states have call predecessors, (1091), 96 states have return successors, (1106), 1088 states have call predecessors, (1106), 1087 states have call successors, (1106) [2021-11-23 02:22:30,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3306 states to 3306 states and 5125 transitions. [2021-11-23 02:22:30,268 INFO L78 Accepts]: Start accepts. Automaton has 3306 states and 5125 transitions. Word has length 12 [2021-11-23 02:22:30,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:22:30,268 INFO L470 AbstractCegarLoop]: Abstraction has 3306 states and 5125 transitions. [2021-11-23 02:22:30,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:22:30,269 INFO L276 IsEmpty]: Start isEmpty. Operand 3306 states and 5125 transitions. [2021-11-23 02:22:30,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-23 02:22:30,269 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:22:30,270 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:22:30,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:22:30,270 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:22:30,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:22:30,271 INFO L85 PathProgramCache]: Analyzing trace with hash 274569302, now seen corresponding path program 1 times [2021-11-23 02:22:30,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:22:30,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057033968] [2021-11-23 02:22:30,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:22:30,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:22:30,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:22:30,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:22:30,532 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:22:30,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057033968] [2021-11-23 02:22:30,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057033968] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:22:30,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:22:30,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:22:30,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376103527] [2021-11-23 02:22:30,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:22:30,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:22:30,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:22:30,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:22:30,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:22:30,535 INFO L87 Difference]: Start difference. First operand 3306 states and 5125 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:22:31,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:22:31,100 INFO L93 Difference]: Finished difference Result 3308 states and 5126 transitions. [2021-11-23 02:22:31,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:22:31,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-11-23 02:22:31,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:22:31,128 INFO L225 Difference]: With dead ends: 3308 [2021-11-23 02:22:31,128 INFO L226 Difference]: Without dead ends: 3305 [2021-11-23 02:22:31,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:22:31,132 INFO L933 BasicCegarLoop]: 2607 mSDtfsCounter, 2699 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2699 SdHoareTripleChecker+Valid, 2607 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:22:31,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2699 Valid, 2607 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:22:31,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3305 states. [2021-11-23 02:22:31,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3305 to 3305. [2021-11-23 02:22:31,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3305 states, 2118 states have (on average 1.381964117091596) internal successors, (2927), 2288 states have internal predecessors, (2927), 1090 states have call successors, (1090), 96 states have call predecessors, (1090), 96 states have return successors, (1106), 1088 states have call predecessors, (1106), 1087 states have call successors, (1106) [2021-11-23 02:22:31,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3305 states to 3305 states and 5123 transitions. [2021-11-23 02:22:31,559 INFO L78 Accepts]: Start accepts. Automaton has 3305 states and 5123 transitions. Word has length 13 [2021-11-23 02:22:31,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:22:31,559 INFO L470 AbstractCegarLoop]: Abstraction has 3305 states and 5123 transitions. [2021-11-23 02:22:31,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:22:31,560 INFO L276 IsEmpty]: Start isEmpty. Operand 3305 states and 5123 transitions. [2021-11-23 02:22:31,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-23 02:22:31,561 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:22:31,561 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:22:31,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:22:31,562 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:22:31,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:22:31,562 INFO L85 PathProgramCache]: Analyzing trace with hash -79369714, now seen corresponding path program 1 times [2021-11-23 02:22:31,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:22:31,563 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710084752] [2021-11-23 02:22:31,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:22:31,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:22:31,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:22:31,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:22:31,783 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:22:31,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710084752] [2021-11-23 02:22:31,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710084752] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:22:31,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:22:31,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:22:31,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275053925] [2021-11-23 02:22:31,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:22:31,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:22:31,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:22:31,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:22:31,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:22:31,786 INFO L87 Difference]: Start difference. First operand 3305 states and 5123 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:22:32,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:22:32,305 INFO L93 Difference]: Finished difference Result 3307 states and 5124 transitions. [2021-11-23 02:22:32,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:22:32,305 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-11-23 02:22:32,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:22:32,338 INFO L225 Difference]: With dead ends: 3307 [2021-11-23 02:22:32,338 INFO L226 Difference]: Without dead ends: 3296 [2021-11-23 02:22:32,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:22:32,347 INFO L933 BasicCegarLoop]: 2606 mSDtfsCounter, 2696 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2696 SdHoareTripleChecker+Valid, 2606 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:22:32,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2696 Valid, 2606 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:22:32,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3296 states. [2021-11-23 02:22:32,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3296 to 3296. [2021-11-23 02:22:32,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3296 states, 2111 states have (on average 1.3818095689246803) internal successors, (2917), 2280 states have internal predecessors, (2917), 1088 states have call successors, (1088), 96 states have call predecessors, (1088), 96 states have return successors, (1105), 1087 states have call predecessors, (1105), 1086 states have call successors, (1105) [2021-11-23 02:22:32,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3296 states to 3296 states and 5110 transitions. [2021-11-23 02:22:32,690 INFO L78 Accepts]: Start accepts. Automaton has 3296 states and 5110 transitions. Word has length 14 [2021-11-23 02:22:32,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:22:32,690 INFO L470 AbstractCegarLoop]: Abstraction has 3296 states and 5110 transitions. [2021-11-23 02:22:32,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-23 02:22:32,692 INFO L276 IsEmpty]: Start isEmpty. Operand 3296 states and 5110 transitions. [2021-11-23 02:22:32,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-23 02:22:32,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:22:32,718 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:22:32,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:22:32,718 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:22:32,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:22:32,719 INFO L85 PathProgramCache]: Analyzing trace with hash -51273764, now seen corresponding path program 1 times [2021-11-23 02:22:32,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:22:32,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248038909] [2021-11-23 02:22:32,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:22:32,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:22:32,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:22:33,083 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 02:22:33,084 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:22:33,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248038909] [2021-11-23 02:22:33,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248038909] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:22:33,084 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:22:33,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:22:33,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958711309] [2021-11-23 02:22:33,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:22:33,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:22:33,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:22:33,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:22:33,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:22:33,087 INFO L87 Difference]: Start difference. First operand 3296 states and 5110 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:22:34,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:22:34,268 INFO L93 Difference]: Finished difference Result 6604 states and 10272 transitions. [2021-11-23 02:22:34,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:22:34,269 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 107 [2021-11-23 02:22:34,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:22:34,296 INFO L225 Difference]: With dead ends: 6604 [2021-11-23 02:22:34,296 INFO L226 Difference]: Without dead ends: 3312 [2021-11-23 02:22:34,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:22:34,315 INFO L933 BasicCegarLoop]: 2596 mSDtfsCounter, 15 mSDsluCounter, 5366 mSDsCounter, 0 mSdLazyCounter, 302 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 7774 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:22:34,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 7774 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 302 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 02:22:34,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3312 states. [2021-11-23 02:22:34,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3312 to 3303. [2021-11-23 02:22:34,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3303 states, 2117 states have (on average 1.3807274444969295) internal successors, (2923), 2287 states have internal predecessors, (2923), 1088 states have call successors, (1088), 96 states have call predecessors, (1088), 97 states have return successors, (1106), 1087 states have call predecessors, (1106), 1086 states have call successors, (1106) [2021-11-23 02:22:34,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 5117 transitions. [2021-11-23 02:22:34,610 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 5117 transitions. Word has length 107 [2021-11-23 02:22:34,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:22:34,612 INFO L470 AbstractCegarLoop]: Abstraction has 3303 states and 5117 transitions. [2021-11-23 02:22:34,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 2 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:22:34,613 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 5117 transitions. [2021-11-23 02:22:34,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-23 02:22:34,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:22:34,621 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:22:34,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:22:34,622 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:22:34,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:22:34,623 INFO L85 PathProgramCache]: Analyzing trace with hash -309253265, now seen corresponding path program 1 times [2021-11-23 02:22:34,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:22:34,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305299335] [2021-11-23 02:22:34,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:22:34,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:22:34,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:22:34,986 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 02:22:34,986 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:22:34,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305299335] [2021-11-23 02:22:34,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305299335] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:22:34,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:22:34,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:22:34,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909772368] [2021-11-23 02:22:34,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:22:34,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:22:34,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:22:34,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:22:34,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:22:34,990 INFO L87 Difference]: Start difference. First operand 3303 states and 5117 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:22:36,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:22:36,290 INFO L93 Difference]: Finished difference Result 5050 states and 7772 transitions. [2021-11-23 02:22:36,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:22:36,291 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 108 [2021-11-23 02:22:36,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:22:36,318 INFO L225 Difference]: With dead ends: 5050 [2021-11-23 02:22:36,318 INFO L226 Difference]: Without dead ends: 3295 [2021-11-23 02:22:36,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:22:36,328 INFO L933 BasicCegarLoop]: 4899 mSDtfsCounter, 2451 mSDsluCounter, 2621 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2451 SdHoareTripleChecker+Valid, 7428 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:22:36,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2451 Valid, 7428 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-23 02:22:36,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3295 states. [2021-11-23 02:22:36,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3295 to 3292. [2021-11-23 02:22:36,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3292 states, 2109 states have (on average 1.3812233285917497) internal successors, (2913), 2279 states have internal predecessors, (2913), 1087 states have call successors, (1087), 96 states have call predecessors, (1087), 95 states have return successors, (1086), 1084 states have call predecessors, (1086), 1086 states have call successors, (1086) [2021-11-23 02:22:36,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3292 states to 3292 states and 5086 transitions. [2021-11-23 02:22:36,675 INFO L78 Accepts]: Start accepts. Automaton has 3292 states and 5086 transitions. Word has length 108 [2021-11-23 02:22:36,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:22:36,676 INFO L470 AbstractCegarLoop]: Abstraction has 3292 states and 5086 transitions. [2021-11-23 02:22:36,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:22:36,676 INFO L276 IsEmpty]: Start isEmpty. Operand 3292 states and 5086 transitions. [2021-11-23 02:22:36,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-23 02:22:36,700 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:22:36,701 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:22:36,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:22:36,701 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:22:36,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:22:36,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1353696525, now seen corresponding path program 1 times [2021-11-23 02:22:36,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:22:36,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421016290] [2021-11-23 02:22:36,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:22:36,703 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:22:36,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:22:37,131 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-23 02:22:37,132 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:22:37,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421016290] [2021-11-23 02:22:37,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421016290] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:22:37,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:22:37,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:22:37,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58697974] [2021-11-23 02:22:37,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:22:37,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:22:37,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:22:37,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:22:37,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:22:37,135 INFO L87 Difference]: Start difference. First operand 3292 states and 5086 transitions. Second operand has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 4 states have internal predecessors, (122), 4 states have call successors, (21), 4 states have call predecessors, (21), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:22:38,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:22:38,650 INFO L93 Difference]: Finished difference Result 6680 states and 10319 transitions. [2021-11-23 02:22:38,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:22:38,651 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 4 states have internal predecessors, (122), 4 states have call successors, (21), 4 states have call predecessors, (21), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 176 [2021-11-23 02:22:38,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:22:38,676 INFO L225 Difference]: With dead ends: 6680 [2021-11-23 02:22:38,677 INFO L226 Difference]: Without dead ends: 3392 [2021-11-23 02:22:38,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:22:38,692 INFO L933 BasicCegarLoop]: 2605 mSDtfsCounter, 91 mSDsluCounter, 10771 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 12990 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:22:38,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 12990 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 523 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-23 02:22:38,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3392 states. [2021-11-23 02:22:38,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3392 to 3383. [2021-11-23 02:22:38,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3383 states, 2170 states have (on average 1.37926267281106) internal successors, (2993), 2340 states have internal predecessors, (2993), 1113 states have call successors, (1113), 100 states have call predecessors, (1113), 99 states have return successors, (1112), 1110 states have call predecessors, (1112), 1112 states have call successors, (1112) [2021-11-23 02:22:38,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3383 states to 3383 states and 5218 transitions. [2021-11-23 02:22:38,958 INFO L78 Accepts]: Start accepts. Automaton has 3383 states and 5218 transitions. Word has length 176 [2021-11-23 02:22:38,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:22:38,959 INFO L470 AbstractCegarLoop]: Abstraction has 3383 states and 5218 transitions. [2021-11-23 02:22:38,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.333333333333332) internal successors, (122), 4 states have internal predecessors, (122), 4 states have call successors, (21), 4 states have call predecessors, (21), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:22:38,960 INFO L276 IsEmpty]: Start isEmpty. Operand 3383 states and 5218 transitions. [2021-11-23 02:22:38,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-23 02:22:38,975 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:22:38,975 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:22:38,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:22:38,976 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:22:38,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:22:38,976 INFO L85 PathProgramCache]: Analyzing trace with hash 420616683, now seen corresponding path program 1 times [2021-11-23 02:22:38,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:22:38,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073690514] [2021-11-23 02:22:38,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:22:38,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:22:41,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:22:42,000 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-23 02:22:42,000 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:22:42,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073690514] [2021-11-23 02:22:42,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073690514] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:22:42,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:22:42,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:22:42,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009214524] [2021-11-23 02:22:42,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:22:42,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:22:42,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:22:42,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:22:42,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:22:42,003 INFO L87 Difference]: Start difference. First operand 3383 states and 5218 transitions. Second operand has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:22:44,574 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:22:49,044 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:22:50,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:22:50,324 INFO L93 Difference]: Finished difference Result 6780 states and 10478 transitions. [2021-11-23 02:22:50,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:22:50,325 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 173 [2021-11-23 02:22:50,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:22:50,341 INFO L225 Difference]: With dead ends: 6780 [2021-11-23 02:22:50,341 INFO L226 Difference]: Without dead ends: 3401 [2021-11-23 02:22:50,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:22:50,355 INFO L933 BasicCegarLoop]: 2597 mSDtfsCounter, 10 mSDsluCounter, 10310 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12595 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:22:50,356 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 12595 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 877 Invalid, 1 Unknown, 0 Unchecked, 8.1s Time] [2021-11-23 02:22:50,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3401 states. [2021-11-23 02:22:50,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3401 to 3391. [2021-11-23 02:22:50,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3391 states, 2178 states have (on average 1.3778696051423325) internal successors, (3001), 2348 states have internal predecessors, (3001), 1113 states have call successors, (1113), 100 states have call predecessors, (1113), 99 states have return successors, (1112), 1110 states have call predecessors, (1112), 1112 states have call successors, (1112) [2021-11-23 02:22:50,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3391 states to 3391 states and 5226 transitions. [2021-11-23 02:22:50,613 INFO L78 Accepts]: Start accepts. Automaton has 3391 states and 5226 transitions. Word has length 173 [2021-11-23 02:22:50,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:22:50,615 INFO L470 AbstractCegarLoop]: Abstraction has 3391 states and 5226 transitions. [2021-11-23 02:22:50,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.333333333333332) internal successors, (110), 6 states have internal predecessors, (110), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:22:50,615 INFO L276 IsEmpty]: Start isEmpty. Operand 3391 states and 5226 transitions. [2021-11-23 02:22:50,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-23 02:22:50,632 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:22:50,632 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:22:50,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 02:22:50,633 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:22:50,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:22:50,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1553441705, now seen corresponding path program 1 times [2021-11-23 02:22:50,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:22:50,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259034056] [2021-11-23 02:22:50,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:22:50,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:22:53,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:22:53,721 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-23 02:22:53,721 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:22:53,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259034056] [2021-11-23 02:22:53,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259034056] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:22:53,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:22:53,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:22:53,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640151926] [2021-11-23 02:22:53,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:22:53,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:22:53,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:22:53,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:22:53,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:22:53,724 INFO L87 Difference]: Start difference. First operand 3391 states and 5226 transitions. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:22:56,776 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:23:01,480 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:23:03,502 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:23:04,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:23:04,674 INFO L93 Difference]: Finished difference Result 6796 states and 10494 transitions. [2021-11-23 02:23:04,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:23:04,675 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 175 [2021-11-23 02:23:04,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:23:04,691 INFO L225 Difference]: With dead ends: 6796 [2021-11-23 02:23:04,691 INFO L226 Difference]: Without dead ends: 3409 [2021-11-23 02:23:04,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:23:04,707 INFO L933 BasicCegarLoop]: 2597 mSDtfsCounter, 10 mSDsluCounter, 10310 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 9 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12595 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:23:04,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 12595 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 877 Invalid, 2 Unknown, 0 Unchecked, 10.7s Time] [2021-11-23 02:23:04,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3409 states. [2021-11-23 02:23:05,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3409 to 3395. [2021-11-23 02:23:05,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3395 states, 2182 states have (on average 1.3771769019248397) internal successors, (3005), 2352 states have internal predecessors, (3005), 1113 states have call successors, (1113), 100 states have call predecessors, (1113), 99 states have return successors, (1112), 1110 states have call predecessors, (1112), 1112 states have call successors, (1112) [2021-11-23 02:23:05,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3395 states to 3395 states and 5230 transitions. [2021-11-23 02:23:05,057 INFO L78 Accepts]: Start accepts. Automaton has 3395 states and 5230 transitions. Word has length 175 [2021-11-23 02:23:05,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:23:05,057 INFO L470 AbstractCegarLoop]: Abstraction has 3395 states and 5230 transitions. [2021-11-23 02:23:05,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:23:05,058 INFO L276 IsEmpty]: Start isEmpty. Operand 3395 states and 5230 transitions. [2021-11-23 02:23:05,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-23 02:23:05,079 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:23:05,080 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:23:05,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-23 02:23:05,080 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:23:05,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:23:05,081 INFO L85 PathProgramCache]: Analyzing trace with hash 383018635, now seen corresponding path program 1 times [2021-11-23 02:23:05,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:23:05,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929512441] [2021-11-23 02:23:05,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:23:05,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:23:07,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:23:07,640 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-23 02:23:07,640 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:23:07,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929512441] [2021-11-23 02:23:07,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929512441] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:23:07,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:23:07,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:23:07,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791075409] [2021-11-23 02:23:07,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:23:07,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:23:07,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:23:07,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:23:07,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:23:07,642 INFO L87 Difference]: Start difference. First operand 3395 states and 5230 transitions. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:23:09,275 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:23:15,082 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:23:16,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:23:16,247 INFO L93 Difference]: Finished difference Result 6804 states and 10502 transitions. [2021-11-23 02:23:16,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:23:16,247 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 176 [2021-11-23 02:23:16,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:23:16,261 INFO L225 Difference]: With dead ends: 6804 [2021-11-23 02:23:16,261 INFO L226 Difference]: Without dead ends: 3413 [2021-11-23 02:23:16,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:23:16,276 INFO L933 BasicCegarLoop]: 2597 mSDtfsCounter, 10 mSDsluCounter, 10310 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12595 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:23:16,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 12595 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 878 Invalid, 1 Unknown, 0 Unchecked, 8.4s Time] [2021-11-23 02:23:16,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3413 states. [2021-11-23 02:23:16,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3413 to 3399. [2021-11-23 02:23:16,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3399 states, 2186 states have (on average 1.3764867337602928) internal successors, (3009), 2356 states have internal predecessors, (3009), 1113 states have call successors, (1113), 100 states have call predecessors, (1113), 99 states have return successors, (1112), 1110 states have call predecessors, (1112), 1112 states have call successors, (1112) [2021-11-23 02:23:16,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3399 states to 3399 states and 5234 transitions. [2021-11-23 02:23:16,528 INFO L78 Accepts]: Start accepts. Automaton has 3399 states and 5234 transitions. Word has length 176 [2021-11-23 02:23:16,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:23:16,529 INFO L470 AbstractCegarLoop]: Abstraction has 3399 states and 5234 transitions. [2021-11-23 02:23:16,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:23:16,530 INFO L276 IsEmpty]: Start isEmpty. Operand 3399 states and 5234 transitions. [2021-11-23 02:23:16,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-23 02:23:16,547 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:23:16,548 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:23:16,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 02:23:16,548 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:23:16,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:23:16,549 INFO L85 PathProgramCache]: Analyzing trace with hash 2036723485, now seen corresponding path program 1 times [2021-11-23 02:23:16,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:23:16,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887853349] [2021-11-23 02:23:16,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:23:16,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:23:17,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:23:17,811 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-23 02:23:17,811 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:23:17,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887853349] [2021-11-23 02:23:17,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887853349] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:23:17,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:23:17,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:23:17,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10944938] [2021-11-23 02:23:17,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:23:17,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:23:17,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:23:17,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:23:17,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:23:17,815 INFO L87 Difference]: Start difference. First operand 3399 states and 5234 transitions. Second operand has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-23 02:23:19,477 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:23:25,319 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:23:27,356 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:23:29,966 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:23:30,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:23:30,672 INFO L93 Difference]: Finished difference Result 6812 states and 10508 transitions. [2021-11-23 02:23:30,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:23:30,673 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 184 [2021-11-23 02:23:30,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:23:30,687 INFO L225 Difference]: With dead ends: 6812 [2021-11-23 02:23:30,687 INFO L226 Difference]: Without dead ends: 3417 [2021-11-23 02:23:30,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:23:30,701 INFO L933 BasicCegarLoop]: 2597 mSDtfsCounter, 3 mSDsluCounter, 7632 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 10015 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:23:30,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 10015 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 773 Invalid, 3 Unknown, 0 Unchecked, 12.7s Time] [2021-11-23 02:23:30,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3417 states. [2021-11-23 02:23:31,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3417 to 3399. [2021-11-23 02:23:31,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3399 states, 2186 states have (on average 1.3764867337602928) internal successors, (3009), 2356 states have internal predecessors, (3009), 1113 states have call successors, (1113), 100 states have call predecessors, (1113), 99 states have return successors, (1112), 1110 states have call predecessors, (1112), 1112 states have call successors, (1112) [2021-11-23 02:23:31,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3399 states to 3399 states and 5234 transitions. [2021-11-23 02:23:31,023 INFO L78 Accepts]: Start accepts. Automaton has 3399 states and 5234 transitions. Word has length 184 [2021-11-23 02:23:31,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:23:31,024 INFO L470 AbstractCegarLoop]: Abstraction has 3399 states and 5234 transitions. [2021-11-23 02:23:31,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.2) internal successors, (116), 5 states have internal predecessors, (116), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-23 02:23:31,024 INFO L276 IsEmpty]: Start isEmpty. Operand 3399 states and 5234 transitions. [2021-11-23 02:23:31,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-23 02:23:31,040 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:23:31,041 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:23:31,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 02:23:31,041 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:23:31,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:23:31,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1582284355, now seen corresponding path program 1 times [2021-11-23 02:23:31,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:23:31,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363358514] [2021-11-23 02:23:31,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:23:31,043 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:23:32,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:23:32,421 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-23 02:23:32,422 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:23:32,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363358514] [2021-11-23 02:23:32,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363358514] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:23:32,422 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:23:32,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:23:32,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867449088] [2021-11-23 02:23:32,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:23:32,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:23:32,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:23:32,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:23:32,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:23:32,424 INFO L87 Difference]: Start difference. First operand 3399 states and 5234 transitions. Second operand has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-23 02:23:35,798 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:23:36,829 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:23:40,575 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:23:41,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:23:41,697 INFO L93 Difference]: Finished difference Result 6812 states and 10508 transitions. [2021-11-23 02:23:41,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:23:41,698 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 183 [2021-11-23 02:23:41,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:23:41,711 INFO L225 Difference]: With dead ends: 6812 [2021-11-23 02:23:41,712 INFO L226 Difference]: Without dead ends: 3417 [2021-11-23 02:23:41,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:23:41,726 INFO L933 BasicCegarLoop]: 2597 mSDtfsCounter, 3 mSDsluCounter, 7632 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 10015 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:23:41,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 10015 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 775 Invalid, 1 Unknown, 0 Unchecked, 9.1s Time] [2021-11-23 02:23:41,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3417 states. [2021-11-23 02:23:41,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3417 to 3399. [2021-11-23 02:23:41,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3399 states, 2186 states have (on average 1.3764867337602928) internal successors, (3009), 2356 states have internal predecessors, (3009), 1113 states have call successors, (1113), 100 states have call predecessors, (1113), 99 states have return successors, (1112), 1110 states have call predecessors, (1112), 1112 states have call successors, (1112) [2021-11-23 02:23:41,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3399 states to 3399 states and 5234 transitions. [2021-11-23 02:23:41,980 INFO L78 Accepts]: Start accepts. Automaton has 3399 states and 5234 transitions. Word has length 183 [2021-11-23 02:23:41,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:23:41,981 INFO L470 AbstractCegarLoop]: Abstraction has 3399 states and 5234 transitions. [2021-11-23 02:23:41,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-23 02:23:41,981 INFO L276 IsEmpty]: Start isEmpty. Operand 3399 states and 5234 transitions. [2021-11-23 02:23:41,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-23 02:23:41,999 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:23:41,999 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:23:42,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-23 02:23:42,000 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:23:42,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:23:42,001 INFO L85 PathProgramCache]: Analyzing trace with hash -65116539, now seen corresponding path program 1 times [2021-11-23 02:23:42,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:23:42,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020634599] [2021-11-23 02:23:42,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:23:42,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:23:43,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:23:43,512 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-23 02:23:43,513 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:23:43,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020634599] [2021-11-23 02:23:43,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020634599] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:23:43,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:23:43,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:23:43,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928233586] [2021-11-23 02:23:43,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:23:43,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:23:43,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:23:43,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:23:43,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:23:43,516 INFO L87 Difference]: Start difference. First operand 3399 states and 5234 transitions. Second operand has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-23 02:23:45,746 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:23:48,289 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:23:51,850 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:23:53,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:23:53,076 INFO L93 Difference]: Finished difference Result 6812 states and 10508 transitions. [2021-11-23 02:23:53,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:23:53,077 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 182 [2021-11-23 02:23:53,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:23:53,092 INFO L225 Difference]: With dead ends: 6812 [2021-11-23 02:23:53,092 INFO L226 Difference]: Without dead ends: 3417 [2021-11-23 02:23:53,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:23:53,105 INFO L933 BasicCegarLoop]: 2597 mSDtfsCounter, 3 mSDsluCounter, 7632 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 10015 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:23:53,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 10015 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 775 Invalid, 1 Unknown, 0 Unchecked, 9.4s Time] [2021-11-23 02:23:53,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3417 states. [2021-11-23 02:23:53,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3417 to 3399. [2021-11-23 02:23:53,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3399 states, 2186 states have (on average 1.3764867337602928) internal successors, (3009), 2356 states have internal predecessors, (3009), 1113 states have call successors, (1113), 100 states have call predecessors, (1113), 99 states have return successors, (1112), 1110 states have call predecessors, (1112), 1112 states have call successors, (1112) [2021-11-23 02:23:53,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3399 states to 3399 states and 5234 transitions. [2021-11-23 02:23:53,368 INFO L78 Accepts]: Start accepts. Automaton has 3399 states and 5234 transitions. Word has length 182 [2021-11-23 02:23:53,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:23:53,369 INFO L470 AbstractCegarLoop]: Abstraction has 3399 states and 5234 transitions. [2021-11-23 02:23:53,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 22.8) internal successors, (114), 5 states have internal predecessors, (114), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-23 02:23:53,369 INFO L276 IsEmpty]: Start isEmpty. Operand 3399 states and 5234 transitions. [2021-11-23 02:23:53,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-23 02:23:53,387 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:23:53,387 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:23:53,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-23 02:23:53,388 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:23:53,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:23:53,388 INFO L85 PathProgramCache]: Analyzing trace with hash 310087507, now seen corresponding path program 1 times [2021-11-23 02:23:53,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:23:53,389 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312365770] [2021-11-23 02:23:53,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:23:53,389 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:23:55,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:23:55,463 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-23 02:23:55,463 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:23:55,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312365770] [2021-11-23 02:23:55,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312365770] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:23:55,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:23:55,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:23:55,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742525994] [2021-11-23 02:23:55,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:23:55,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:23:55,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:23:55,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:23:55,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:23:55,466 INFO L87 Difference]: Start difference. First operand 3399 states and 5234 transitions. Second operand has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:23:59,100 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:24:01,131 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:24:04,326 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:24:05,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:24:05,677 INFO L93 Difference]: Finished difference Result 6812 states and 10510 transitions. [2021-11-23 02:24:05,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:24:05,678 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 184 [2021-11-23 02:24:05,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:24:05,694 INFO L225 Difference]: With dead ends: 6812 [2021-11-23 02:24:05,694 INFO L226 Difference]: Without dead ends: 3417 [2021-11-23 02:24:05,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:24:05,705 INFO L933 BasicCegarLoop]: 2597 mSDtfsCounter, 10 mSDsluCounter, 10310 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 9 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12595 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:24:05,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 12595 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 877 Invalid, 2 Unknown, 0 Unchecked, 10.0s Time] [2021-11-23 02:24:05,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3417 states. [2021-11-23 02:24:05,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3417 to 3403. [2021-11-23 02:24:05,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3403 states, 2190 states have (on average 1.3757990867579908) internal successors, (3013), 2360 states have internal predecessors, (3013), 1113 states have call successors, (1113), 100 states have call predecessors, (1113), 99 states have return successors, (1112), 1110 states have call predecessors, (1112), 1112 states have call successors, (1112) [2021-11-23 02:24:05,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3403 states to 3403 states and 5238 transitions. [2021-11-23 02:24:05,972 INFO L78 Accepts]: Start accepts. Automaton has 3403 states and 5238 transitions. Word has length 184 [2021-11-23 02:24:05,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:24:05,973 INFO L470 AbstractCegarLoop]: Abstraction has 3403 states and 5238 transitions. [2021-11-23 02:24:05,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.166666666666668) internal successors, (121), 6 states have internal predecessors, (121), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:24:05,974 INFO L276 IsEmpty]: Start isEmpty. Operand 3403 states and 5238 transitions. [2021-11-23 02:24:06,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-23 02:24:06,002 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:24:06,003 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:24:06,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 02:24:06,003 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:24:06,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:24:06,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1894326629, now seen corresponding path program 1 times [2021-11-23 02:24:06,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:24:06,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696642417] [2021-11-23 02:24:06,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:24:06,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:24:07,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:24:08,233 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-23 02:24:08,233 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:24:08,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696642417] [2021-11-23 02:24:08,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696642417] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:24:08,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:24:08,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:24:08,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279724348] [2021-11-23 02:24:08,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:24:08,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:24:08,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:24:08,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:24:08,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:24:08,236 INFO L87 Difference]: Start difference. First operand 3403 states and 5238 transitions. Second operand has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:24:09,632 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:24:12,329 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:24:13,729 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:24:16,413 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:24:17,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:24:17,693 INFO L93 Difference]: Finished difference Result 6820 states and 10518 transitions. [2021-11-23 02:24:17,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:24:17,694 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 186 [2021-11-23 02:24:17,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:24:17,711 INFO L225 Difference]: With dead ends: 6820 [2021-11-23 02:24:17,711 INFO L226 Difference]: Without dead ends: 3421 [2021-11-23 02:24:17,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:24:17,724 INFO L933 BasicCegarLoop]: 2597 mSDtfsCounter, 10 mSDsluCounter, 10310 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12595 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:24:17,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 12595 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 877 Invalid, 1 Unknown, 0 Unchecked, 9.3s Time] [2021-11-23 02:24:17,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3421 states. [2021-11-23 02:24:18,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3421 to 3407. [2021-11-23 02:24:18,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3407 states, 2194 states have (on average 1.3751139471285323) internal successors, (3017), 2364 states have internal predecessors, (3017), 1113 states have call successors, (1113), 100 states have call predecessors, (1113), 99 states have return successors, (1112), 1110 states have call predecessors, (1112), 1112 states have call successors, (1112) [2021-11-23 02:24:18,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3407 states to 3407 states and 5242 transitions. [2021-11-23 02:24:18,104 INFO L78 Accepts]: Start accepts. Automaton has 3407 states and 5242 transitions. Word has length 186 [2021-11-23 02:24:18,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:24:18,105 INFO L470 AbstractCegarLoop]: Abstraction has 3407 states and 5242 transitions. [2021-11-23 02:24:18,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:24:18,106 INFO L276 IsEmpty]: Start isEmpty. Operand 3407 states and 5242 transitions. [2021-11-23 02:24:18,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-23 02:24:18,126 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:24:18,127 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:24:18,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-23 02:24:18,127 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:24:18,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:24:18,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1178051995, now seen corresponding path program 1 times [2021-11-23 02:24:18,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:24:18,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368859473] [2021-11-23 02:24:18,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:24:18,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:24:20,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:24:20,508 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-23 02:24:20,508 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:24:20,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368859473] [2021-11-23 02:24:20,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368859473] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:24:20,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:24:20,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:24:20,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603843606] [2021-11-23 02:24:20,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:24:20,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:24:20,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:24:20,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:24:20,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:24:20,512 INFO L87 Difference]: Start difference. First operand 3407 states and 5242 transitions. Second operand has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:24:22,901 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:24:26,348 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:24:27,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:24:27,383 INFO L93 Difference]: Finished difference Result 6828 states and 10526 transitions. [2021-11-23 02:24:27,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:24:27,384 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 188 [2021-11-23 02:24:27,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:24:27,400 INFO L225 Difference]: With dead ends: 6828 [2021-11-23 02:24:27,401 INFO L226 Difference]: Without dead ends: 3425 [2021-11-23 02:24:27,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:24:27,412 INFO L933 BasicCegarLoop]: 2597 mSDtfsCounter, 10 mSDsluCounter, 7841 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 9 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 10185 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:24:27,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 10185 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 594 Invalid, 2 Unknown, 0 Unchecked, 6.7s Time] [2021-11-23 02:24:27,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3425 states. [2021-11-23 02:24:27,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3425 to 3411. [2021-11-23 02:24:27,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3411 states, 2198 states have (on average 1.3744313011828935) internal successors, (3021), 2368 states have internal predecessors, (3021), 1113 states have call successors, (1113), 100 states have call predecessors, (1113), 99 states have return successors, (1112), 1110 states have call predecessors, (1112), 1112 states have call successors, (1112) [2021-11-23 02:24:27,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3411 states to 3411 states and 5246 transitions. [2021-11-23 02:24:27,669 INFO L78 Accepts]: Start accepts. Automaton has 3411 states and 5246 transitions. Word has length 188 [2021-11-23 02:24:27,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:24:27,669 INFO L470 AbstractCegarLoop]: Abstraction has 3411 states and 5246 transitions. [2021-11-23 02:24:27,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:24:27,670 INFO L276 IsEmpty]: Start isEmpty. Operand 3411 states and 5246 transitions. [2021-11-23 02:24:27,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-23 02:24:27,688 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:24:27,688 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:24:27,688 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-23 02:24:27,688 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:24:27,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:24:27,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1051956475, now seen corresponding path program 1 times [2021-11-23 02:24:27,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:24:27,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482201096] [2021-11-23 02:24:27,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:24:27,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:24:30,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:24:30,844 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-23 02:24:30,844 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:24:30,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482201096] [2021-11-23 02:24:30,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482201096] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:24:30,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:24:30,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:24:30,845 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596087066] [2021-11-23 02:24:30,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:24:30,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:24:30,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:24:30,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:24:30,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:24:30,847 INFO L87 Difference]: Start difference. First operand 3411 states and 5246 transitions. Second operand has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:24:32,696 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:24:34,716 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:24:36,726 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:24:38,312 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:24:40,206 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:24:43,786 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:24:45,828 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:24:47,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:24:47,427 INFO L93 Difference]: Finished difference Result 6864 states and 10580 transitions. [2021-11-23 02:24:47,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:24:47,428 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 190 [2021-11-23 02:24:47,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:24:47,442 INFO L225 Difference]: With dead ends: 6864 [2021-11-23 02:24:47,442 INFO L226 Difference]: Without dead ends: 3457 [2021-11-23 02:24:47,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:24:47,454 INFO L933 BasicCegarLoop]: 2612 mSDtfsCounter, 36 mSDsluCounter, 10101 mSDsCounter, 0 mSdLazyCounter, 1088 mSolverCounterSat, 20 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 12438 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1088 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:24:47,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 12438 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1088 Invalid, 4 Unknown, 0 Unchecked, 16.4s Time] [2021-11-23 02:24:47,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3457 states. [2021-11-23 02:24:47,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3457 to 3443. [2021-11-23 02:24:47,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3443 states, 2220 states have (on average 1.3752252252252253) internal successors, (3053), 2392 states have internal predecessors, (3053), 1123 states have call successors, (1123), 100 states have call predecessors, (1123), 99 states have return successors, (1122), 1120 states have call predecessors, (1122), 1122 states have call successors, (1122) [2021-11-23 02:24:47,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3443 states to 3443 states and 5298 transitions. [2021-11-23 02:24:47,747 INFO L78 Accepts]: Start accepts. Automaton has 3443 states and 5298 transitions. Word has length 190 [2021-11-23 02:24:47,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:24:47,747 INFO L470 AbstractCegarLoop]: Abstraction has 3443 states and 5298 transitions. [2021-11-23 02:24:47,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.166666666666668) internal successors, (127), 6 states have internal predecessors, (127), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:24:47,748 INFO L276 IsEmpty]: Start isEmpty. Operand 3443 states and 5298 transitions. [2021-11-23 02:24:47,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-23 02:24:47,763 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:24:47,764 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:24:47,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 02:24:47,764 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:24:47,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:24:47,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1249444027, now seen corresponding path program 1 times [2021-11-23 02:24:47,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:24:47,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252655319] [2021-11-23 02:24:47,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:24:47,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:24:49,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:24:49,754 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-23 02:24:49,754 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:24:49,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252655319] [2021-11-23 02:24:49,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252655319] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:24:49,755 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:24:49,755 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:24:49,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489392727] [2021-11-23 02:24:49,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:24:49,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:24:49,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:24:49,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:24:49,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:24:49,758 INFO L87 Difference]: Start difference. First operand 3443 states and 5298 transitions. Second operand has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-23 02:24:51,757 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:24:53,045 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:24:55,481 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:24:58,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:24:58,591 INFO L93 Difference]: Finished difference Result 6900 states and 10636 transitions. [2021-11-23 02:24:58,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:24:58,592 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 194 [2021-11-23 02:24:58,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:24:58,605 INFO L225 Difference]: With dead ends: 6900 [2021-11-23 02:24:58,605 INFO L226 Difference]: Without dead ends: 3461 [2021-11-23 02:24:58,616 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:24:58,617 INFO L933 BasicCegarLoop]: 2597 mSDtfsCounter, 3 mSDsluCounter, 7632 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 10015 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:24:58,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 10015 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2021-11-23 02:24:58,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3461 states. [2021-11-23 02:24:58,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3461 to 3443. [2021-11-23 02:24:58,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3443 states, 2220 states have (on average 1.3752252252252253) internal successors, (3053), 2392 states have internal predecessors, (3053), 1123 states have call successors, (1123), 100 states have call predecessors, (1123), 99 states have return successors, (1122), 1120 states have call predecessors, (1122), 1122 states have call successors, (1122) [2021-11-23 02:24:58,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3443 states to 3443 states and 5298 transitions. [2021-11-23 02:24:58,945 INFO L78 Accepts]: Start accepts. Automaton has 3443 states and 5298 transitions. Word has length 194 [2021-11-23 02:24:58,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:24:58,947 INFO L470 AbstractCegarLoop]: Abstraction has 3443 states and 5298 transitions. [2021-11-23 02:24:58,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-23 02:24:58,948 INFO L276 IsEmpty]: Start isEmpty. Operand 3443 states and 5298 transitions. [2021-11-23 02:24:58,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-23 02:24:58,961 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:24:58,961 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:24:58,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-23 02:24:58,962 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:24:58,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:24:58,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1319016987, now seen corresponding path program 1 times [2021-11-23 02:24:58,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:24:58,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054995966] [2021-11-23 02:24:58,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:24:58,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:25:00,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:25:00,585 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-23 02:25:00,585 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:25:00,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054995966] [2021-11-23 02:25:00,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054995966] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:25:00,586 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:25:00,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:25:00,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398184918] [2021-11-23 02:25:00,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:25:00,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:25:00,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:25:00,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:25:00,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:25:00,588 INFO L87 Difference]: Start difference. First operand 3443 states and 5298 transitions. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:25:03,072 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:25:04,505 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:25:06,266 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:25:09,381 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:25:10,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:25:10,775 INFO L93 Difference]: Finished difference Result 6900 states and 10638 transitions. [2021-11-23 02:25:10,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:25:10,776 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 194 [2021-11-23 02:25:10,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:25:10,785 INFO L225 Difference]: With dead ends: 6900 [2021-11-23 02:25:10,785 INFO L226 Difference]: Without dead ends: 3461 [2021-11-23 02:25:10,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:25:10,792 INFO L933 BasicCegarLoop]: 2597 mSDtfsCounter, 10 mSDsluCounter, 10310 mSDsCounter, 0 mSdLazyCounter, 878 mSolverCounterSat, 9 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12595 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 878 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:25:10,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 12595 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 878 Invalid, 1 Unknown, 0 Unchecked, 10.0s Time] [2021-11-23 02:25:10,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3461 states. [2021-11-23 02:25:11,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3461 to 3447. [2021-11-23 02:25:11,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3447 states, 2224 states have (on average 1.3745503597122302) internal successors, (3057), 2396 states have internal predecessors, (3057), 1123 states have call successors, (1123), 100 states have call predecessors, (1123), 99 states have return successors, (1122), 1120 states have call predecessors, (1122), 1122 states have call successors, (1122) [2021-11-23 02:25:11,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3447 states to 3447 states and 5302 transitions. [2021-11-23 02:25:11,044 INFO L78 Accepts]: Start accepts. Automaton has 3447 states and 5302 transitions. Word has length 194 [2021-11-23 02:25:11,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:25:11,045 INFO L470 AbstractCegarLoop]: Abstraction has 3447 states and 5302 transitions. [2021-11-23 02:25:11,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:25:11,049 INFO L276 IsEmpty]: Start isEmpty. Operand 3447 states and 5302 transitions. [2021-11-23 02:25:11,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-23 02:25:11,061 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:25:11,062 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:25:11,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-23 02:25:11,062 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:25:11,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:25:11,063 INFO L85 PathProgramCache]: Analyzing trace with hash -947893451, now seen corresponding path program 1 times [2021-11-23 02:25:11,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:25:11,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315395771] [2021-11-23 02:25:11,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:25:11,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:25:12,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:25:12,489 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-23 02:25:12,489 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:25:12,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315395771] [2021-11-23 02:25:12,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315395771] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:25:12,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:25:12,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:25:12,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465504052] [2021-11-23 02:25:12,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:25:12,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:25:12,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:25:12,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:25:12,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:25:12,492 INFO L87 Difference]: Start difference. First operand 3447 states and 5302 transitions. Second operand has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-23 02:25:13,922 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:25:15,085 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:25:16,785 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:25:17,942 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:25:21,041 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:25:22,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:25:22,213 INFO L93 Difference]: Finished difference Result 6908 states and 10644 transitions. [2021-11-23 02:25:22,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:25:22,214 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 196 [2021-11-23 02:25:22,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:25:22,223 INFO L225 Difference]: With dead ends: 6908 [2021-11-23 02:25:22,223 INFO L226 Difference]: Without dead ends: 3465 [2021-11-23 02:25:22,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:25:22,234 INFO L933 BasicCegarLoop]: 2597 mSDtfsCounter, 3 mSDsluCounter, 7632 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 10015 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:25:22,234 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 10015 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 775 Invalid, 1 Unknown, 0 Unchecked, 9.6s Time] [2021-11-23 02:25:22,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3465 states. [2021-11-23 02:25:22,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3465 to 3447. [2021-11-23 02:25:22,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3447 states, 2224 states have (on average 1.3745503597122302) internal successors, (3057), 2396 states have internal predecessors, (3057), 1123 states have call successors, (1123), 100 states have call predecessors, (1123), 99 states have return successors, (1122), 1120 states have call predecessors, (1122), 1122 states have call successors, (1122) [2021-11-23 02:25:22,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3447 states to 3447 states and 5302 transitions. [2021-11-23 02:25:22,460 INFO L78 Accepts]: Start accepts. Automaton has 3447 states and 5302 transitions. Word has length 196 [2021-11-23 02:25:22,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:25:22,461 INFO L470 AbstractCegarLoop]: Abstraction has 3447 states and 5302 transitions. [2021-11-23 02:25:22,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.6) internal successors, (128), 5 states have internal predecessors, (128), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-23 02:25:22,462 INFO L276 IsEmpty]: Start isEmpty. Operand 3447 states and 5302 transitions. [2021-11-23 02:25:22,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-11-23 02:25:22,473 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:25:22,473 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:25:22,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-23 02:25:22,473 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:25:22,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:25:22,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1033823589, now seen corresponding path program 1 times [2021-11-23 02:25:22,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:25:22,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988746659] [2021-11-23 02:25:22,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:25:22,475 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:25:23,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:25:23,516 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-23 02:25:23,516 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:25:23,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988746659] [2021-11-23 02:25:23,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988746659] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:25:23,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:25:23,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:25:23,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515308559] [2021-11-23 02:25:23,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:25:23,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:25:23,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:25:23,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:25:23,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:25:23,520 INFO L87 Difference]: Start difference. First operand 3447 states and 5302 transitions. Second operand has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-23 02:25:25,249 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:25:26,289 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:25:30,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:25:30,943 INFO L93 Difference]: Finished difference Result 6908 states and 10644 transitions. [2021-11-23 02:25:30,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:25:30,944 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 198 [2021-11-23 02:25:30,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:25:30,956 INFO L225 Difference]: With dead ends: 6908 [2021-11-23 02:25:30,956 INFO L226 Difference]: Without dead ends: 3465 [2021-11-23 02:25:30,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:25:30,967 INFO L933 BasicCegarLoop]: 2597 mSDtfsCounter, 3 mSDsluCounter, 7632 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 10015 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:25:30,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 10015 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2021-11-23 02:25:30,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3465 states. [2021-11-23 02:25:31,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3465 to 3447. [2021-11-23 02:25:31,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3447 states, 2224 states have (on average 1.3745503597122302) internal successors, (3057), 2396 states have internal predecessors, (3057), 1123 states have call successors, (1123), 100 states have call predecessors, (1123), 99 states have return successors, (1122), 1120 states have call predecessors, (1122), 1122 states have call successors, (1122) [2021-11-23 02:25:31,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3447 states to 3447 states and 5302 transitions. [2021-11-23 02:25:31,216 INFO L78 Accepts]: Start accepts. Automaton has 3447 states and 5302 transitions. Word has length 198 [2021-11-23 02:25:31,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:25:31,217 INFO L470 AbstractCegarLoop]: Abstraction has 3447 states and 5302 transitions. [2021-11-23 02:25:31,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-23 02:25:31,217 INFO L276 IsEmpty]: Start isEmpty. Operand 3447 states and 5302 transitions. [2021-11-23 02:25:31,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-23 02:25:31,229 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:25:31,229 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:25:31,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-23 02:25:31,230 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:25:31,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:25:31,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1049568707, now seen corresponding path program 1 times [2021-11-23 02:25:31,231 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:25:31,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543487014] [2021-11-23 02:25:31,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:25:31,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:25:32,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:25:32,824 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-23 02:25:32,825 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:25:32,825 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543487014] [2021-11-23 02:25:32,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543487014] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:25:32,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:25:32,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:25:32,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321222634] [2021-11-23 02:25:32,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:25:32,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:25:32,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:25:32,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:25:32,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:25:32,829 INFO L87 Difference]: Start difference. First operand 3447 states and 5302 transitions. Second operand has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-23 02:25:36,392 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:25:38,415 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:25:41,477 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:25:42,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:25:42,630 INFO L93 Difference]: Finished difference Result 6908 states and 10644 transitions. [2021-11-23 02:25:42,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:25:42,630 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 200 [2021-11-23 02:25:42,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:25:42,638 INFO L225 Difference]: With dead ends: 6908 [2021-11-23 02:25:42,639 INFO L226 Difference]: Without dead ends: 3465 [2021-11-23 02:25:42,646 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:25:42,646 INFO L933 BasicCegarLoop]: 2597 mSDtfsCounter, 3 mSDsluCounter, 7632 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 10015 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:25:42,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 10015 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 774 Invalid, 2 Unknown, 0 Unchecked, 9.7s Time] [2021-11-23 02:25:42,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3465 states. [2021-11-23 02:25:42,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3465 to 3447. [2021-11-23 02:25:42,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3447 states, 2224 states have (on average 1.3745503597122302) internal successors, (3057), 2396 states have internal predecessors, (3057), 1123 states have call successors, (1123), 100 states have call predecessors, (1123), 99 states have return successors, (1122), 1120 states have call predecessors, (1122), 1122 states have call successors, (1122) [2021-11-23 02:25:42,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3447 states to 3447 states and 5302 transitions. [2021-11-23 02:25:42,860 INFO L78 Accepts]: Start accepts. Automaton has 3447 states and 5302 transitions. Word has length 200 [2021-11-23 02:25:42,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:25:42,861 INFO L470 AbstractCegarLoop]: Abstraction has 3447 states and 5302 transitions. [2021-11-23 02:25:42,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.4) internal successors, (132), 5 states have internal predecessors, (132), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-23 02:25:42,861 INFO L276 IsEmpty]: Start isEmpty. Operand 3447 states and 5302 transitions. [2021-11-23 02:25:42,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-23 02:25:42,873 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:25:42,873 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:25:42,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-23 02:25:42,874 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:25:42,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:25:42,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1692420411, now seen corresponding path program 1 times [2021-11-23 02:25:42,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:25:42,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889482088] [2021-11-23 02:25:42,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:25:42,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:25:44,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:25:44,243 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-23 02:25:44,244 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:25:44,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889482088] [2021-11-23 02:25:44,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889482088] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:25:44,244 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:25:44,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:25:44,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972433378] [2021-11-23 02:25:44,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:25:44,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:25:44,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:25:44,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:25:44,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:25:44,246 INFO L87 Difference]: Start difference. First operand 3447 states and 5302 transitions. Second operand has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-23 02:25:45,656 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:25:46,678 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:25:49,181 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:25:52,203 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:25:53,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:25:53,246 INFO L93 Difference]: Finished difference Result 6908 states and 10644 transitions. [2021-11-23 02:25:53,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:25:53,247 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 204 [2021-11-23 02:25:53,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:25:53,257 INFO L225 Difference]: With dead ends: 6908 [2021-11-23 02:25:53,257 INFO L226 Difference]: Without dead ends: 3465 [2021-11-23 02:25:53,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:25:53,267 INFO L933 BasicCegarLoop]: 2597 mSDtfsCounter, 3 mSDsluCounter, 7632 mSDsCounter, 0 mSdLazyCounter, 775 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 10015 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 775 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:25:53,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 10015 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 775 Invalid, 1 Unknown, 0 Unchecked, 8.9s Time] [2021-11-23 02:25:53,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3465 states. [2021-11-23 02:25:53,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3465 to 3447. [2021-11-23 02:25:53,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3447 states, 2224 states have (on average 1.3745503597122302) internal successors, (3057), 2396 states have internal predecessors, (3057), 1123 states have call successors, (1123), 100 states have call predecessors, (1123), 99 states have return successors, (1122), 1120 states have call predecessors, (1122), 1122 states have call successors, (1122) [2021-11-23 02:25:53,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3447 states to 3447 states and 5302 transitions. [2021-11-23 02:25:53,507 INFO L78 Accepts]: Start accepts. Automaton has 3447 states and 5302 transitions. Word has length 204 [2021-11-23 02:25:53,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:25:53,507 INFO L470 AbstractCegarLoop]: Abstraction has 3447 states and 5302 transitions. [2021-11-23 02:25:53,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.2) internal successors, (136), 5 states have internal predecessors, (136), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-23 02:25:53,508 INFO L276 IsEmpty]: Start isEmpty. Operand 3447 states and 5302 transitions. [2021-11-23 02:25:53,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-23 02:25:53,519 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:25:53,519 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:25:53,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-23 02:25:53,520 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:25:53,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:25:53,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1244858097, now seen corresponding path program 1 times [2021-11-23 02:25:53,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:25:53,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32641446] [2021-11-23 02:25:53,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:25:53,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:25:54,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:25:54,783 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-23 02:25:54,783 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:25:54,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32641446] [2021-11-23 02:25:54,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32641446] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:25:54,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:25:54,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:25:54,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052370735] [2021-11-23 02:25:54,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:25:54,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:25:54,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:25:54,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:25:54,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:25:54,785 INFO L87 Difference]: Start difference. First operand 3447 states and 5302 transitions. Second operand has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:25:57,305 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:25:58,779 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:26:01,173 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:26:03,982 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:26:06,019 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:26:07,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:26:07,299 INFO L93 Difference]: Finished difference Result 6936 states and 10692 transitions. [2021-11-23 02:26:07,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:26:07,299 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 204 [2021-11-23 02:26:07,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:26:07,310 INFO L225 Difference]: With dead ends: 6936 [2021-11-23 02:26:07,310 INFO L226 Difference]: Without dead ends: 3493 [2021-11-23 02:26:07,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:26:07,320 INFO L933 BasicCegarLoop]: 2600 mSDtfsCounter, 36 mSDsluCounter, 7621 mSDsCounter, 0 mSdLazyCounter, 802 mSolverCounterSat, 20 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 10005 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 802 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:26:07,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 10005 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 802 Invalid, 3 Unknown, 0 Unchecked, 12.3s Time] [2021-11-23 02:26:07,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3493 states. [2021-11-23 02:26:07,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3493 to 3479. [2021-11-23 02:26:07,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3479 states, 2246 states have (on average 1.3753339269813) internal successors, (3089), 2420 states have internal predecessors, (3089), 1133 states have call successors, (1133), 100 states have call predecessors, (1133), 99 states have return successors, (1132), 1130 states have call predecessors, (1132), 1132 states have call successors, (1132) [2021-11-23 02:26:07,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3479 states to 3479 states and 5354 transitions. [2021-11-23 02:26:07,558 INFO L78 Accepts]: Start accepts. Automaton has 3479 states and 5354 transitions. Word has length 204 [2021-11-23 02:26:07,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:26:07,559 INFO L470 AbstractCegarLoop]: Abstraction has 3479 states and 5354 transitions. [2021-11-23 02:26:07,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.5) internal successors, (141), 6 states have internal predecessors, (141), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:26:07,559 INFO L276 IsEmpty]: Start isEmpty. Operand 3479 states and 5354 transitions. [2021-11-23 02:26:07,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-23 02:26:07,571 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:26:07,571 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:26:07,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-11-23 02:26:07,571 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:26:07,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:26:07,572 INFO L85 PathProgramCache]: Analyzing trace with hash 162307429, now seen corresponding path program 1 times [2021-11-23 02:26:07,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:26:07,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70008245] [2021-11-23 02:26:07,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:26:07,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:26:09,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:26:09,616 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-23 02:26:09,616 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:26:09,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70008245] [2021-11-23 02:26:09,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70008245] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:26:09,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:26:09,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:26:09,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317007170] [2021-11-23 02:26:09,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:26:09,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:26:09,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:26:09,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:26:09,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:26:09,619 INFO L87 Difference]: Start difference. First operand 3479 states and 5354 transitions. Second operand has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:26:11,349 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:26:13,448 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:26:15,423 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:26:17,010 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:26:20,169 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:26:22,197 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:26:24,237 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:26:25,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:26:25,722 INFO L93 Difference]: Finished difference Result 7000 states and 10796 transitions. [2021-11-23 02:26:25,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:26:25,722 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 206 [2021-11-23 02:26:25,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:26:25,730 INFO L225 Difference]: With dead ends: 7000 [2021-11-23 02:26:25,731 INFO L226 Difference]: Without dead ends: 3525 [2021-11-23 02:26:25,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:26:25,738 INFO L933 BasicCegarLoop]: 2608 mSDtfsCounter, 36 mSDsluCounter, 10089 mSDsCounter, 0 mSdLazyCounter, 1091 mSolverCounterSat, 20 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 12422 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1091 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:26:25,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 12422 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1091 Invalid, 2 Unknown, 0 Unchecked, 15.9s Time] [2021-11-23 02:26:25,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3525 states. [2021-11-23 02:26:25,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3525 to 3511. [2021-11-23 02:26:25,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3511 states, 2268 states have (on average 1.3761022927689595) internal successors, (3121), 2444 states have internal predecessors, (3121), 1143 states have call successors, (1143), 100 states have call predecessors, (1143), 99 states have return successors, (1142), 1140 states have call predecessors, (1142), 1142 states have call successors, (1142) [2021-11-23 02:26:25,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3511 states to 3511 states and 5406 transitions. [2021-11-23 02:26:25,914 INFO L78 Accepts]: Start accepts. Automaton has 3511 states and 5406 transitions. Word has length 206 [2021-11-23 02:26:25,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:26:25,915 INFO L470 AbstractCegarLoop]: Abstraction has 3511 states and 5406 transitions. [2021-11-23 02:26:25,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:26:25,915 INFO L276 IsEmpty]: Start isEmpty. Operand 3511 states and 5406 transitions. [2021-11-23 02:26:25,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-23 02:26:25,926 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:26:25,927 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:26:25,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-23 02:26:25,927 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:26:25,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:26:25,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1846784805, now seen corresponding path program 1 times [2021-11-23 02:26:25,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:26:25,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107213924] [2021-11-23 02:26:25,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:26:25,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:26:26,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:26:26,516 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-23 02:26:26,517 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:26:26,517 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107213924] [2021-11-23 02:26:26,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107213924] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:26:26,517 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:26:26,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:26:26,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875491596] [2021-11-23 02:26:26,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:26:26,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:26:26,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:26:26,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:26:26,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:26:26,519 INFO L87 Difference]: Start difference. First operand 3511 states and 5406 transitions. Second operand has 5 states, 5 states have (on average 28.6) internal successors, (143), 5 states have internal predecessors, (143), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:26:28,785 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:26:30,170 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:26:32,641 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:26:33,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:26:33,647 INFO L93 Difference]: Finished difference Result 7034 states and 10850 transitions. [2021-11-23 02:26:33,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:26:33,648 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.6) internal successors, (143), 5 states have internal predecessors, (143), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 206 [2021-11-23 02:26:33,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:26:33,656 INFO L225 Difference]: With dead ends: 7034 [2021-11-23 02:26:33,656 INFO L226 Difference]: Without dead ends: 3527 [2021-11-23 02:26:33,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:26:33,665 INFO L933 BasicCegarLoop]: 2599 mSDtfsCounter, 10 mSDsluCounter, 7840 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 10188 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:26:33,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 10188 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 584 Invalid, 2 Unknown, 0 Unchecked, 7.0s Time] [2021-11-23 02:26:33,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3527 states. [2021-11-23 02:26:33,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3527 to 3513. [2021-11-23 02:26:33,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3513 states, 2270 states have (on average 1.3757709251101322) internal successors, (3123), 2446 states have internal predecessors, (3123), 1143 states have call successors, (1143), 100 states have call predecessors, (1143), 99 states have return successors, (1142), 1140 states have call predecessors, (1142), 1142 states have call successors, (1142) [2021-11-23 02:26:33,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3513 states to 3513 states and 5408 transitions. [2021-11-23 02:26:33,858 INFO L78 Accepts]: Start accepts. Automaton has 3513 states and 5408 transitions. Word has length 206 [2021-11-23 02:26:33,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:26:33,858 INFO L470 AbstractCegarLoop]: Abstraction has 3513 states and 5408 transitions. [2021-11-23 02:26:33,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.6) internal successors, (143), 5 states have internal predecessors, (143), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:26:33,859 INFO L276 IsEmpty]: Start isEmpty. Operand 3513 states and 5408 transitions. [2021-11-23 02:26:33,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-23 02:26:33,870 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:26:33,870 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:26:33,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-11-23 02:26:33,871 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:26:33,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:26:33,871 INFO L85 PathProgramCache]: Analyzing trace with hash -2084192193, now seen corresponding path program 1 times [2021-11-23 02:26:33,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:26:33,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972222264] [2021-11-23 02:26:33,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:26:33,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:26:34,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:26:34,316 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-23 02:26:34,316 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:26:34,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972222264] [2021-11-23 02:26:34,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972222264] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:26:34,317 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:26:34,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:26:34,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672889355] [2021-11-23 02:26:34,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:26:34,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:26:34,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:26:34,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:26:34,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:26:34,319 INFO L87 Difference]: Start difference. First operand 3513 states and 5408 transitions. Second operand has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-23 02:26:36,658 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:26:38,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:26:38,431 INFO L93 Difference]: Finished difference Result 7038 states and 10854 transitions. [2021-11-23 02:26:38,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:26:38,432 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 208 [2021-11-23 02:26:38,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:26:38,439 INFO L225 Difference]: With dead ends: 7038 [2021-11-23 02:26:38,439 INFO L226 Difference]: Without dead ends: 3529 [2021-11-23 02:26:38,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:26:38,448 INFO L933 BasicCegarLoop]: 2599 mSDtfsCounter, 10 mSDsluCounter, 7840 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 10188 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:26:38,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 10188 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2021-11-23 02:26:38,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3529 states. [2021-11-23 02:26:38,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3529 to 3515. [2021-11-23 02:26:38,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3515 states, 2272 states have (on average 1.3754401408450705) internal successors, (3125), 2448 states have internal predecessors, (3125), 1143 states have call successors, (1143), 100 states have call predecessors, (1143), 99 states have return successors, (1142), 1140 states have call predecessors, (1142), 1142 states have call successors, (1142) [2021-11-23 02:26:38,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3515 states to 3515 states and 5410 transitions. [2021-11-23 02:26:38,627 INFO L78 Accepts]: Start accepts. Automaton has 3515 states and 5410 transitions. Word has length 208 [2021-11-23 02:26:38,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:26:38,627 INFO L470 AbstractCegarLoop]: Abstraction has 3515 states and 5410 transitions. [2021-11-23 02:26:38,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.2) internal successors, (121), 5 states have internal predecessors, (121), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-23 02:26:38,628 INFO L276 IsEmpty]: Start isEmpty. Operand 3515 states and 5410 transitions. [2021-11-23 02:26:38,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-11-23 02:26:38,640 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:26:38,641 INFO L514 BasicCegarLoop]: trace histogram [11, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:26:38,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-23 02:26:38,641 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:26:38,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:26:38,642 INFO L85 PathProgramCache]: Analyzing trace with hash 66708935, now seen corresponding path program 1 times [2021-11-23 02:26:38,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:26:38,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195668646] [2021-11-23 02:26:38,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:26:38,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:26:38,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:26:38,976 INFO L134 CoverageAnalysis]: Checked inductivity of 278 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-11-23 02:26:38,976 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:26:38,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195668646] [2021-11-23 02:26:38,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195668646] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:26:38,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:26:38,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:26:38,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373271797] [2021-11-23 02:26:38,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:26:38,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:26:38,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:26:38,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:26:38,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:26:38,979 INFO L87 Difference]: Start difference. First operand 3515 states and 5410 transitions. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 3 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-23 02:26:39,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:26:39,958 INFO L93 Difference]: Finished difference Result 7130 states and 11003 transitions. [2021-11-23 02:26:39,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:26:39,959 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 3 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 220 [2021-11-23 02:26:39,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:26:39,967 INFO L225 Difference]: With dead ends: 7130 [2021-11-23 02:26:39,967 INFO L226 Difference]: Without dead ends: 3619 [2021-11-23 02:26:39,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:26:39,975 INFO L933 BasicCegarLoop]: 2640 mSDtfsCounter, 53 mSDsluCounter, 5423 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 7863 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:26:39,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 7863 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-23 02:26:39,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3619 states. [2021-11-23 02:26:40,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3619 to 3519. [2021-11-23 02:26:40,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3519 states, 2276 states have (on average 1.374780316344464) internal successors, (3129), 2452 states have internal predecessors, (3129), 1143 states have call successors, (1143), 100 states have call predecessors, (1143), 99 states have return successors, (1142), 1140 states have call predecessors, (1142), 1142 states have call successors, (1142) [2021-11-23 02:26:40,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3519 states to 3519 states and 5414 transitions. [2021-11-23 02:26:40,158 INFO L78 Accepts]: Start accepts. Automaton has 3519 states and 5414 transitions. Word has length 220 [2021-11-23 02:26:40,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:26:40,158 INFO L470 AbstractCegarLoop]: Abstraction has 3519 states and 5414 transitions. [2021-11-23 02:26:40,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 3 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-23 02:26:40,158 INFO L276 IsEmpty]: Start isEmpty. Operand 3519 states and 5414 transitions. [2021-11-23 02:26:40,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-11-23 02:26:40,165 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:26:40,165 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:26:40,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-23 02:26:40,166 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:26:40,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:26:40,166 INFO L85 PathProgramCache]: Analyzing trace with hash 737254213, now seen corresponding path program 1 times [2021-11-23 02:26:40,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:26:40,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793021186] [2021-11-23 02:26:40,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:26:40,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:26:40,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:26:42,679 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 02:26:42,679 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:26:42,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793021186] [2021-11-23 02:26:42,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793021186] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:26:42,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:26:42,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:26:42,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382444749] [2021-11-23 02:26:42,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:26:42,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:26:42,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:26:42,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:26:42,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:26:42,682 INFO L87 Difference]: Start difference. First operand 3519 states and 5414 transitions. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 02:26:44,916 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:26:46,516 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:26:54,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:26:54,964 INFO L93 Difference]: Finished difference Result 7094 states and 10938 transitions. [2021-11-23 02:26:54,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:26:54,965 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 198 [2021-11-23 02:26:54,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:26:54,980 INFO L225 Difference]: With dead ends: 7094 [2021-11-23 02:26:54,980 INFO L226 Difference]: Without dead ends: 3579 [2021-11-23 02:26:54,991 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:26:54,992 INFO L933 BasicCegarLoop]: 2564 mSDtfsCounter, 1703 mSDsluCounter, 6378 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1956 SdHoareTripleChecker+Valid, 8724 SdHoareTripleChecker+Invalid, 1565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:26:54,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1956 Valid, 8724 Invalid, 1565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 1138 Invalid, 0 Unknown, 0 Unchecked, 11.6s Time] [2021-11-23 02:26:54,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3579 states. [2021-11-23 02:26:55,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3579 to 3527. [2021-11-23 02:26:55,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3527 states, 2284 states have (on average 1.3752189141856392) internal successors, (3141), 2460 states have internal predecessors, (3141), 1143 states have call successors, (1143), 100 states have call predecessors, (1143), 99 states have return successors, (1142), 1140 states have call predecessors, (1142), 1142 states have call successors, (1142) [2021-11-23 02:26:55,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3527 states to 3527 states and 5426 transitions. [2021-11-23 02:26:55,301 INFO L78 Accepts]: Start accepts. Automaton has 3527 states and 5426 transitions. Word has length 198 [2021-11-23 02:26:55,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:26:55,302 INFO L470 AbstractCegarLoop]: Abstraction has 3527 states and 5426 transitions. [2021-11-23 02:26:55,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 3 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 02:26:55,302 INFO L276 IsEmpty]: Start isEmpty. Operand 3527 states and 5426 transitions. [2021-11-23 02:26:55,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-23 02:26:55,313 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:26:55,313 INFO L514 BasicCegarLoop]: trace histogram [11, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:26:55,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-23 02:26:55,314 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:26:55,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:26:55,314 INFO L85 PathProgramCache]: Analyzing trace with hash -867185851, now seen corresponding path program 1 times [2021-11-23 02:26:55,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:26:55,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262116619] [2021-11-23 02:26:55,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:26:55,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:26:55,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:26:55,625 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-11-23 02:26:55,625 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:26:55,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262116619] [2021-11-23 02:26:55,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262116619] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:26:55,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:26:55,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:26:55,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869872774] [2021-11-23 02:26:55,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:26:55,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:26:55,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:26:55,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:26:55,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:26:55,628 INFO L87 Difference]: Start difference. First operand 3527 states and 5426 transitions. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 3 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-23 02:26:56,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:26:56,768 INFO L93 Difference]: Finished difference Result 7154 states and 11035 transitions. [2021-11-23 02:26:56,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:26:56,769 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 3 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 222 [2021-11-23 02:26:56,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:26:56,777 INFO L225 Difference]: With dead ends: 7154 [2021-11-23 02:26:56,777 INFO L226 Difference]: Without dead ends: 3631 [2021-11-23 02:26:56,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:26:56,868 INFO L933 BasicCegarLoop]: 2647 mSDtfsCounter, 53 mSDsluCounter, 5432 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 7879 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-23 02:26:56,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 7879 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-23 02:26:56,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3631 states. [2021-11-23 02:26:57,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3631 to 3531. [2021-11-23 02:26:57,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3531 states, 2288 states have (on average 1.374562937062937) internal successors, (3145), 2464 states have internal predecessors, (3145), 1143 states have call successors, (1143), 100 states have call predecessors, (1143), 99 states have return successors, (1142), 1140 states have call predecessors, (1142), 1142 states have call successors, (1142) [2021-11-23 02:26:57,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3531 states to 3531 states and 5430 transitions. [2021-11-23 02:26:57,101 INFO L78 Accepts]: Start accepts. Automaton has 3531 states and 5430 transitions. Word has length 222 [2021-11-23 02:26:57,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:26:57,101 INFO L470 AbstractCegarLoop]: Abstraction has 3531 states and 5430 transitions. [2021-11-23 02:26:57,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 3 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-23 02:26:57,102 INFO L276 IsEmpty]: Start isEmpty. Operand 3531 states and 5430 transitions. [2021-11-23 02:26:57,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-23 02:26:57,108 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:26:57,109 INFO L514 BasicCegarLoop]: trace histogram [11, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:26:57,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-11-23 02:26:57,109 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:26:57,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:26:57,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1712091397, now seen corresponding path program 1 times [2021-11-23 02:26:57,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:26:57,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344326760] [2021-11-23 02:26:57,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:26:57,110 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:26:59,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:26:59,386 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2021-11-23 02:26:59,386 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:26:59,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344326760] [2021-11-23 02:26:59,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344326760] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:26:59,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:26:59,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:26:59,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231598686] [2021-11-23 02:26:59,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:26:59,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:26:59,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:26:59,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:26:59,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:26:59,388 INFO L87 Difference]: Start difference. First operand 3531 states and 5430 transitions. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-23 02:27:00,683 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:27:04,199 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:27:06,704 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:27:07,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:07,295 INFO L93 Difference]: Finished difference Result 7076 states and 10902 transitions. [2021-11-23 02:27:07,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:27:07,296 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 222 [2021-11-23 02:27:07,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:07,309 INFO L225 Difference]: With dead ends: 7076 [2021-11-23 02:27:07,309 INFO L226 Difference]: Without dead ends: 3549 [2021-11-23 02:27:07,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:27:07,320 INFO L933 BasicCegarLoop]: 2597 mSDtfsCounter, 10 mSDsluCounter, 7841 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 9 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 10185 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:07,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 10185 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 594 Invalid, 2 Unknown, 0 Unchecked, 7.7s Time] [2021-11-23 02:27:07,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3549 states. [2021-11-23 02:27:07,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3549 to 3535. [2021-11-23 02:27:07,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3535 states, 2292 states have (on average 1.3739092495636998) internal successors, (3149), 2468 states have internal predecessors, (3149), 1143 states have call successors, (1143), 100 states have call predecessors, (1143), 99 states have return successors, (1142), 1140 states have call predecessors, (1142), 1142 states have call successors, (1142) [2021-11-23 02:27:07,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3535 states to 3535 states and 5434 transitions. [2021-11-23 02:27:07,631 INFO L78 Accepts]: Start accepts. Automaton has 3535 states and 5434 transitions. Word has length 222 [2021-11-23 02:27:07,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:07,633 INFO L470 AbstractCegarLoop]: Abstraction has 3535 states and 5434 transitions. [2021-11-23 02:27:07,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-23 02:27:07,633 INFO L276 IsEmpty]: Start isEmpty. Operand 3535 states and 5434 transitions. [2021-11-23 02:27:07,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-11-23 02:27:07,644 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:07,644 INFO L514 BasicCegarLoop]: trace histogram [11, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:27:07,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-11-23 02:27:07,644 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:07,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:07,645 INFO L85 PathProgramCache]: Analyzing trace with hash -2144647605, now seen corresponding path program 1 times [2021-11-23 02:27:07,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:07,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893473164] [2021-11-23 02:27:07,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:07,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:07,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:07,929 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2021-11-23 02:27:07,930 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:07,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893473164] [2021-11-23 02:27:07,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893473164] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:27:07,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:27:07,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:27:07,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23398242] [2021-11-23 02:27:07,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:07,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:27:07,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:07,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:27:07,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:27:07,933 INFO L87 Difference]: Start difference. First operand 3535 states and 5434 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-23 02:27:08,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:08,813 INFO L93 Difference]: Finished difference Result 7078 states and 10902 transitions. [2021-11-23 02:27:08,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:27:08,814 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 225 [2021-11-23 02:27:08,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:08,821 INFO L225 Difference]: With dead ends: 7078 [2021-11-23 02:27:08,821 INFO L226 Difference]: Without dead ends: 3547 [2021-11-23 02:27:08,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:27:08,828 INFO L933 BasicCegarLoop]: 2599 mSDtfsCounter, 7 mSDsluCounter, 2675 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 5176 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:08,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 5176 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 02:27:08,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3547 states. [2021-11-23 02:27:09,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3547 to 3537. [2021-11-23 02:27:09,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3537 states, 2294 states have (on average 1.373583260680035) internal successors, (3151), 2470 states have internal predecessors, (3151), 1143 states have call successors, (1143), 100 states have call predecessors, (1143), 99 states have return successors, (1142), 1140 states have call predecessors, (1142), 1142 states have call successors, (1142) [2021-11-23 02:27:09,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3537 states to 3537 states and 5436 transitions. [2021-11-23 02:27:09,079 INFO L78 Accepts]: Start accepts. Automaton has 3537 states and 5436 transitions. Word has length 225 [2021-11-23 02:27:09,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:09,079 INFO L470 AbstractCegarLoop]: Abstraction has 3537 states and 5436 transitions. [2021-11-23 02:27:09,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-23 02:27:09,079 INFO L276 IsEmpty]: Start isEmpty. Operand 3537 states and 5436 transitions. [2021-11-23 02:27:09,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-23 02:27:09,087 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:09,087 INFO L514 BasicCegarLoop]: trace histogram [11, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:27:09,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-11-23 02:27:09,088 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:09,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:09,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1346384709, now seen corresponding path program 1 times [2021-11-23 02:27:09,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:09,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626952315] [2021-11-23 02:27:09,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:09,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:09,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:09,355 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2021-11-23 02:27:09,355 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:09,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626952315] [2021-11-23 02:27:09,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626952315] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:27:09,356 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:27:09,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:27:09,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242794214] [2021-11-23 02:27:09,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:09,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:27:09,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:09,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:27:09,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:27:09,359 INFO L87 Difference]: Start difference. First operand 3537 states and 5436 transitions. Second operand has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-23 02:27:10,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:10,112 INFO L93 Difference]: Finished difference Result 7082 states and 10906 transitions. [2021-11-23 02:27:10,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:27:10,113 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 222 [2021-11-23 02:27:10,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:10,121 INFO L225 Difference]: With dead ends: 7082 [2021-11-23 02:27:10,121 INFO L226 Difference]: Without dead ends: 3549 [2021-11-23 02:27:10,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:27:10,128 INFO L933 BasicCegarLoop]: 2599 mSDtfsCounter, 7 mSDsluCounter, 2675 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 5176 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:10,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 5176 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 02:27:10,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3549 states. [2021-11-23 02:27:10,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3549 to 3539. [2021-11-23 02:27:10,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3539 states, 2296 states have (on average 1.3732578397212543) internal successors, (3153), 2472 states have internal predecessors, (3153), 1143 states have call successors, (1143), 100 states have call predecessors, (1143), 99 states have return successors, (1142), 1140 states have call predecessors, (1142), 1142 states have call successors, (1142) [2021-11-23 02:27:10,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3539 states to 3539 states and 5438 transitions. [2021-11-23 02:27:10,332 INFO L78 Accepts]: Start accepts. Automaton has 3539 states and 5438 transitions. Word has length 222 [2021-11-23 02:27:10,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:10,332 INFO L470 AbstractCegarLoop]: Abstraction has 3539 states and 5438 transitions. [2021-11-23 02:27:10,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.333333333333336) internal successors, (124), 3 states have internal predecessors, (124), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-23 02:27:10,333 INFO L276 IsEmpty]: Start isEmpty. Operand 3539 states and 5438 transitions. [2021-11-23 02:27:10,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-11-23 02:27:10,344 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:10,344 INFO L514 BasicCegarLoop]: trace histogram [11, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:27:10,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-11-23 02:27:10,344 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:10,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:10,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1142135547, now seen corresponding path program 1 times [2021-11-23 02:27:10,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:10,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582631678] [2021-11-23 02:27:10,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:10,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:10,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:10,597 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2021-11-23 02:27:10,597 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:10,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582631678] [2021-11-23 02:27:10,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582631678] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:27:10,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:27:10,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:27:10,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607350063] [2021-11-23 02:27:10,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:10,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:27:10,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:10,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:27:10,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:27:10,600 INFO L87 Difference]: Start difference. First operand 3539 states and 5438 transitions. Second operand has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-23 02:27:11,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:11,470 INFO L93 Difference]: Finished difference Result 7086 states and 10910 transitions. [2021-11-23 02:27:11,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:27:11,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 226 [2021-11-23 02:27:11,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:11,483 INFO L225 Difference]: With dead ends: 7086 [2021-11-23 02:27:11,484 INFO L226 Difference]: Without dead ends: 3551 [2021-11-23 02:27:11,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:27:11,496 INFO L933 BasicCegarLoop]: 2599 mSDtfsCounter, 7 mSDsluCounter, 2675 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 5176 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:11,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 5176 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 02:27:11,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3551 states. [2021-11-23 02:27:11,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3551 to 3541. [2021-11-23 02:27:11,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3541 states, 2298 states have (on average 1.3729329852045258) internal successors, (3155), 2474 states have internal predecessors, (3155), 1143 states have call successors, (1143), 100 states have call predecessors, (1143), 99 states have return successors, (1142), 1140 states have call predecessors, (1142), 1142 states have call successors, (1142) [2021-11-23 02:27:11,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3541 states to 3541 states and 5440 transitions. [2021-11-23 02:27:11,711 INFO L78 Accepts]: Start accepts. Automaton has 3541 states and 5440 transitions. Word has length 226 [2021-11-23 02:27:11,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:11,712 INFO L470 AbstractCegarLoop]: Abstraction has 3541 states and 5440 transitions. [2021-11-23 02:27:11,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.666666666666664) internal successors, (128), 3 states have internal predecessors, (128), 3 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-11-23 02:27:11,712 INFO L276 IsEmpty]: Start isEmpty. Operand 3541 states and 5440 transitions. [2021-11-23 02:27:11,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-23 02:27:11,720 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:11,720 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:27:11,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-11-23 02:27:11,720 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:11,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:11,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1897911227, now seen corresponding path program 1 times [2021-11-23 02:27:11,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:11,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286893619] [2021-11-23 02:27:11,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:11,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:13,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:14,029 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-23 02:27:14,029 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:14,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286893619] [2021-11-23 02:27:14,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286893619] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:27:14,029 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:27:14,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:27:14,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199666853] [2021-11-23 02:27:14,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:14,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:27:14,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:14,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:27:14,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:27:14,033 INFO L87 Difference]: Start difference. First operand 3541 states and 5440 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-23 02:27:16,646 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:27:18,670 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:27:19,790 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:27:21,677 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:27:25,025 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:27:27,371 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:27:27,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:27,876 INFO L93 Difference]: Finished difference Result 7096 states and 10920 transitions. [2021-11-23 02:27:27,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:27:27,877 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 214 [2021-11-23 02:27:27,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:27,885 INFO L225 Difference]: With dead ends: 7096 [2021-11-23 02:27:27,885 INFO L226 Difference]: Without dead ends: 3559 [2021-11-23 02:27:27,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:27:27,893 INFO L933 BasicCegarLoop]: 2597 mSDtfsCounter, 3 mSDsluCounter, 7631 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 2 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 10015 SdHoareTripleChecker+Invalid, 775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:27,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 10015 Invalid, 775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 770 Invalid, 3 Unknown, 0 Unchecked, 13.7s Time] [2021-11-23 02:27:27,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3559 states. [2021-11-23 02:27:28,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3559 to 3541. [2021-11-23 02:27:28,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3541 states, 2298 states have (on average 1.3729329852045258) internal successors, (3155), 2474 states have internal predecessors, (3155), 1143 states have call successors, (1143), 100 states have call predecessors, (1143), 99 states have return successors, (1142), 1140 states have call predecessors, (1142), 1142 states have call successors, (1142) [2021-11-23 02:27:28,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3541 states to 3541 states and 5440 transitions. [2021-11-23 02:27:28,168 INFO L78 Accepts]: Start accepts. Automaton has 3541 states and 5440 transitions. Word has length 214 [2021-11-23 02:27:28,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:28,168 INFO L470 AbstractCegarLoop]: Abstraction has 3541 states and 5440 transitions. [2021-11-23 02:27:28,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-23 02:27:28,168 INFO L276 IsEmpty]: Start isEmpty. Operand 3541 states and 5440 transitions. [2021-11-23 02:27:28,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-23 02:27:28,175 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:28,175 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:27:28,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-11-23 02:27:28,175 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:28,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:28,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1733826423, now seen corresponding path program 1 times [2021-11-23 02:27:28,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:28,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249221404] [2021-11-23 02:27:28,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:28,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:29,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:29,985 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-23 02:27:29,985 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:29,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249221404] [2021-11-23 02:27:29,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249221404] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:27:29,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:27:29,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:27:29,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188858990] [2021-11-23 02:27:29,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:29,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:27:29,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:29,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:27:29,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:27:29,988 INFO L87 Difference]: Start difference. First operand 3541 states and 5440 transitions. Second operand has 6 states, 6 states have (on average 24.833333333333332) internal successors, (149), 6 states have internal predecessors, (149), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:27:32,252 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:27:34,275 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:27:36,529 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:27:39,169 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:27:40,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:40,366 INFO L93 Difference]: Finished difference Result 7124 states and 10968 transitions. [2021-11-23 02:27:40,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:27:40,367 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.833333333333332) internal successors, (149), 6 states have internal predecessors, (149), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 212 [2021-11-23 02:27:40,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:40,375 INFO L225 Difference]: With dead ends: 7124 [2021-11-23 02:27:40,375 INFO L226 Difference]: Without dead ends: 3587 [2021-11-23 02:27:40,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:27:40,382 INFO L933 BasicCegarLoop]: 2610 mSDtfsCounter, 36 mSDsluCounter, 10329 mSDsCounter, 0 mSdLazyCounter, 895 mSolverCounterSat, 20 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 12627 SdHoareTripleChecker+Invalid, 917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 895 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:40,383 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 12627 Invalid, 917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 895 Invalid, 2 Unknown, 0 Unchecked, 10.2s Time] [2021-11-23 02:27:40,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3587 states. [2021-11-23 02:27:40,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3587 to 3573. [2021-11-23 02:27:40,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3573 states, 2320 states have (on average 1.373706896551724) internal successors, (3187), 2498 states have internal predecessors, (3187), 1153 states have call successors, (1153), 100 states have call predecessors, (1153), 99 states have return successors, (1152), 1150 states have call predecessors, (1152), 1152 states have call successors, (1152) [2021-11-23 02:27:40,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3573 states to 3573 states and 5492 transitions. [2021-11-23 02:27:40,589 INFO L78 Accepts]: Start accepts. Automaton has 3573 states and 5492 transitions. Word has length 212 [2021-11-23 02:27:40,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:40,589 INFO L470 AbstractCegarLoop]: Abstraction has 3573 states and 5492 transitions. [2021-11-23 02:27:40,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.833333333333332) internal successors, (149), 6 states have internal predecessors, (149), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:27:40,590 INFO L276 IsEmpty]: Start isEmpty. Operand 3573 states and 5492 transitions. [2021-11-23 02:27:40,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-11-23 02:27:40,601 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:40,601 INFO L514 BasicCegarLoop]: trace histogram [11, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:27:40,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-11-23 02:27:40,601 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:40,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:40,602 INFO L85 PathProgramCache]: Analyzing trace with hash 2054989771, now seen corresponding path program 1 times [2021-11-23 02:27:40,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:40,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681672364] [2021-11-23 02:27:40,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:40,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:42,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:42,388 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2021-11-23 02:27:42,388 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:42,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681672364] [2021-11-23 02:27:42,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681672364] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:27:42,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:27:42,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:27:42,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012070107] [2021-11-23 02:27:42,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:42,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:27:42,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:42,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:27:42,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:27:42,391 INFO L87 Difference]: Start difference. First operand 3573 states and 5492 transitions. Second operand has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-23 02:27:44,492 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:27:45,607 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:27:48,271 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:27:49,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:27:49,330 INFO L93 Difference]: Finished difference Result 7188 states and 11072 transitions. [2021-11-23 02:27:49,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:27:49,331 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 224 [2021-11-23 02:27:49,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:27:49,340 INFO L225 Difference]: With dead ends: 7188 [2021-11-23 02:27:49,340 INFO L226 Difference]: Without dead ends: 3619 [2021-11-23 02:27:49,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:27:49,347 INFO L933 BasicCegarLoop]: 2600 mSDtfsCounter, 36 mSDsluCounter, 7851 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 20 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 10198 SdHoareTripleChecker+Invalid, 632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:27:49,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 10198 Invalid, 632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 611 Invalid, 1 Unknown, 0 Unchecked, 6.7s Time] [2021-11-23 02:27:49,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3619 states. [2021-11-23 02:27:49,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3619 to 3605. [2021-11-23 02:27:49,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3605 states, 2342 states have (on average 1.374466268146883) internal successors, (3219), 2522 states have internal predecessors, (3219), 1163 states have call successors, (1163), 100 states have call predecessors, (1163), 99 states have return successors, (1162), 1160 states have call predecessors, (1162), 1162 states have call successors, (1162) [2021-11-23 02:27:49,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3605 states to 3605 states and 5544 transitions. [2021-11-23 02:27:49,552 INFO L78 Accepts]: Start accepts. Automaton has 3605 states and 5544 transitions. Word has length 224 [2021-11-23 02:27:49,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:27:49,553 INFO L470 AbstractCegarLoop]: Abstraction has 3605 states and 5544 transitions. [2021-11-23 02:27:49,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 22.166666666666668) internal successors, (133), 6 states have internal predecessors, (133), 3 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-23 02:27:49,553 INFO L276 IsEmpty]: Start isEmpty. Operand 3605 states and 5544 transitions. [2021-11-23 02:27:49,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-23 02:27:49,560 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:27:49,561 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:27:49,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-11-23 02:27:49,561 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:27:49,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:27:49,561 INFO L85 PathProgramCache]: Analyzing trace with hash -2141082995, now seen corresponding path program 1 times [2021-11-23 02:27:49,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:27:49,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531365448] [2021-11-23 02:27:49,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:27:49,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:27:52,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:27:52,336 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-23 02:27:52,337 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:27:52,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531365448] [2021-11-23 02:27:52,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531365448] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:27:52,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:27:52,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:27:52,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506567223] [2021-11-23 02:27:52,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:27:52,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:27:52,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:27:52,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:27:52,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:27:52,338 INFO L87 Difference]: Start difference. First operand 3605 states and 5544 transitions. Second operand has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-23 02:27:54,148 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:27:55,225 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:27:56,422 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:28:00,010 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:28:02,050 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:28:03,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:03,267 INFO L93 Difference]: Finished difference Result 7224 states and 11128 transitions. [2021-11-23 02:28:03,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:28:03,267 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 216 [2021-11-23 02:28:03,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:03,275 INFO L225 Difference]: With dead ends: 7224 [2021-11-23 02:28:03,275 INFO L226 Difference]: Without dead ends: 3623 [2021-11-23 02:28:03,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:28:03,282 INFO L933 BasicCegarLoop]: 2597 mSDtfsCounter, 3 mSDsluCounter, 7632 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 10015 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:03,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 10015 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 774 Invalid, 2 Unknown, 0 Unchecked, 10.8s Time] [2021-11-23 02:28:03,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3623 states. [2021-11-23 02:28:03,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3623 to 3605. [2021-11-23 02:28:03,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3605 states, 2342 states have (on average 1.374466268146883) internal successors, (3219), 2522 states have internal predecessors, (3219), 1163 states have call successors, (1163), 100 states have call predecessors, (1163), 99 states have return successors, (1162), 1160 states have call predecessors, (1162), 1162 states have call successors, (1162) [2021-11-23 02:28:03,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3605 states to 3605 states and 5544 transitions. [2021-11-23 02:28:03,548 INFO L78 Accepts]: Start accepts. Automaton has 3605 states and 5544 transitions. Word has length 216 [2021-11-23 02:28:03,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:03,548 INFO L470 AbstractCegarLoop]: Abstraction has 3605 states and 5544 transitions. [2021-11-23 02:28:03,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 2 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-23 02:28:03,548 INFO L276 IsEmpty]: Start isEmpty. Operand 3605 states and 5544 transitions. [2021-11-23 02:28:03,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-23 02:28:03,555 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:03,555 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:28:03,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-11-23 02:28:03,556 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:28:03,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:03,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1393791803, now seen corresponding path program 1 times [2021-11-23 02:28:03,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:03,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060780529] [2021-11-23 02:28:03,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:03,557 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:04,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:28:04,986 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-23 02:28:04,986 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:28:04,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060780529] [2021-11-23 02:28:04,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060780529] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:28:04,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:28:04,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-23 02:28:04,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007008549] [2021-11-23 02:28:04,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:28:04,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:28:04,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:28:04,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:28:04,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:28:04,988 INFO L87 Difference]: Start difference. First operand 3605 states and 5544 transitions. Second operand has 6 states, 6 states have (on average 25.166666666666668) internal successors, (151), 6 states have internal predecessors, (151), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:28:07,515 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:28:09,610 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.82s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:28:10,772 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:28:13,441 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:28:14,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:28:14,662 INFO L93 Difference]: Finished difference Result 7224 states and 11130 transitions. [2021-11-23 02:28:14,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:28:14,663 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.166666666666668) internal successors, (151), 6 states have internal predecessors, (151), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 214 [2021-11-23 02:28:14,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:28:14,674 INFO L225 Difference]: With dead ends: 7224 [2021-11-23 02:28:14,675 INFO L226 Difference]: Without dead ends: 3623 [2021-11-23 02:28:14,684 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:28:14,684 INFO L933 BasicCegarLoop]: 2596 mSDtfsCounter, 10 mSDsluCounter, 10309 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 12593 SdHoareTripleChecker+Invalid, 885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:28:14,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 12593 Invalid, 885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 876 Invalid, 1 Unknown, 0 Unchecked, 9.5s Time] [2021-11-23 02:28:14,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3623 states. [2021-11-23 02:28:14,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3623 to 3609. [2021-11-23 02:28:14,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3609 states, 2346 states have (on average 1.3746803069053708) internal successors, (3225), 2526 states have internal predecessors, (3225), 1163 states have call successors, (1163), 100 states have call predecessors, (1163), 99 states have return successors, (1162), 1160 states have call predecessors, (1162), 1162 states have call successors, (1162) [2021-11-23 02:28:14,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3609 states to 3609 states and 5550 transitions. [2021-11-23 02:28:14,908 INFO L78 Accepts]: Start accepts. Automaton has 3609 states and 5550 transitions. Word has length 214 [2021-11-23 02:28:14,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:28:14,908 INFO L470 AbstractCegarLoop]: Abstraction has 3609 states and 5550 transitions. [2021-11-23 02:28:14,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.166666666666668) internal successors, (151), 6 states have internal predecessors, (151), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:28:14,908 INFO L276 IsEmpty]: Start isEmpty. Operand 3609 states and 5550 transitions. [2021-11-23 02:28:14,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-23 02:28:14,915 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:28:14,915 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:28:14,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-11-23 02:28:14,916 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:28:14,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:28:14,916 INFO L85 PathProgramCache]: Analyzing trace with hash 548127101, now seen corresponding path program 1 times [2021-11-23 02:28:14,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:28:14,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17509248] [2021-11-23 02:28:14,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:28:14,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:28:17,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:14,476 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-23 02:29:14,477 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:29:14,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17509248] [2021-11-23 02:29:14,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17509248] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:29:14,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:29:14,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 02:29:14,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071344043] [2021-11-23 02:29:14,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:29:14,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 02:29:14,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:29:14,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 02:29:14,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:29:14,479 INFO L87 Difference]: Start difference. First operand 3609 states and 5550 transitions. Second operand has 9 states, 9 states have (on average 16.333333333333332) internal successors, (147), 9 states have internal predecessors, (147), 4 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-23 02:29:17,196 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:29:20,628 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:29:21,710 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:29:29,563 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:29:37,617 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-23 02:29:42,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:29:42,278 INFO L93 Difference]: Finished difference Result 7288 states and 11226 transitions. [2021-11-23 02:29:42,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:29:42,279 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 16.333333333333332) internal successors, (147), 9 states have internal predecessors, (147), 4 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 216 [2021-11-23 02:29:42,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:29:42,294 INFO L225 Difference]: With dead ends: 7288 [2021-11-23 02:29:42,294 INFO L226 Difference]: Without dead ends: 3683 [2021-11-23 02:29:42,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-11-23 02:29:42,305 INFO L933 BasicCegarLoop]: 2535 mSDtfsCounter, 3080 mSDsluCounter, 8220 mSDsCounter, 0 mSdLazyCounter, 2552 mSolverCounterSat, 986 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3326 SdHoareTripleChecker+Valid, 10480 SdHoareTripleChecker+Invalid, 3540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 986 IncrementalHoareTripleChecker+Valid, 2552 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:29:42,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3326 Valid, 10480 Invalid, 3540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [986 Valid, 2552 Invalid, 2 Unknown, 0 Unchecked, 25.6s Time] [2021-11-23 02:29:42,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3683 states. [2021-11-23 02:29:42,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3683 to 3611. [2021-11-23 02:29:42,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3611 states, 2348 states have (on average 1.3743611584327087) internal successors, (3227), 2526 states have internal predecessors, (3227), 1163 states have call successors, (1163), 100 states have call predecessors, (1163), 99 states have return successors, (1162), 1160 states have call predecessors, (1162), 1162 states have call successors, (1162) [2021-11-23 02:29:42,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3611 states to 3611 states and 5552 transitions. [2021-11-23 02:29:42,587 INFO L78 Accepts]: Start accepts. Automaton has 3611 states and 5552 transitions. Word has length 216 [2021-11-23 02:29:42,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:29:42,587 INFO L470 AbstractCegarLoop]: Abstraction has 3611 states and 5552 transitions. [2021-11-23 02:29:42,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.333333333333332) internal successors, (147), 9 states have internal predecessors, (147), 4 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-23 02:29:42,587 INFO L276 IsEmpty]: Start isEmpty. Operand 3611 states and 5552 transitions. [2021-11-23 02:29:42,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-11-23 02:29:42,595 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:42,596 INFO L514 BasicCegarLoop]: trace histogram [9, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:29:42,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-11-23 02:29:42,596 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:29:42,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:42,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1645092451, now seen corresponding path program 1 times [2021-11-23 02:29:42,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:29:42,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896319032] [2021-11-23 02:29:42,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:42,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:29:42,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:42,852 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 40 proven. 2 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-11-23 02:29:42,852 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:29:42,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896319032] [2021-11-23 02:29:42,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896319032] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:29:42,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559603107] [2021-11-23 02:29:42,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:42,853 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:29:42,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6af8b3c6-cb27-443c-9a32-68f79c509e71/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:29:42,857 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6af8b3c6-cb27-443c-9a32-68f79c509e71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:29:42,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6af8b3c6-cb27-443c-9a32-68f79c509e71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:29:44,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:29:44,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 4616 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 02:29:44,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:29:44,538 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-23 02:29:44,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:29:44,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559603107] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:29:44,539 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:29:44,539 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 5 [2021-11-23 02:29:44,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424432877] [2021-11-23 02:29:44,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:29:44,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:29:44,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:29:44,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:29:44,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:29:44,541 INFO L87 Difference]: Start difference. First operand 3611 states and 5552 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 02:29:45,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:29:45,867 INFO L93 Difference]: Finished difference Result 7236 states and 11152 transitions. [2021-11-23 02:29:45,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:29:45,873 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) Word has length 224 [2021-11-23 02:29:45,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:29:45,884 INFO L225 Difference]: With dead ends: 7236 [2021-11-23 02:29:45,885 INFO L226 Difference]: Without dead ends: 3629 [2021-11-23 02:29:45,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:29:45,896 INFO L933 BasicCegarLoop]: 2598 mSDtfsCounter, 4 mSDsluCounter, 8079 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 10384 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:29:45,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 10384 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-23 02:29:45,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3629 states. [2021-11-23 02:29:46,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3629 to 3619. [2021-11-23 02:29:46,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3619 states, 2354 states have (on average 1.3734069668649107) internal successors, (3233), 2532 states have internal predecessors, (3233), 1163 states have call successors, (1163), 100 states have call predecessors, (1163), 101 states have return successors, (1172), 1162 states have call predecessors, (1172), 1162 states have call successors, (1172) [2021-11-23 02:29:46,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3619 states to 3619 states and 5568 transitions. [2021-11-23 02:29:46,245 INFO L78 Accepts]: Start accepts. Automaton has 3619 states and 5568 transitions. Word has length 224 [2021-11-23 02:29:46,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:29:46,246 INFO L470 AbstractCegarLoop]: Abstraction has 3619 states and 5568 transitions. [2021-11-23 02:29:46,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 4 states have internal predecessors, (146), 2 states have call successors, (25), 2 states have call predecessors, (25), 3 states have return successors, (17), 3 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-23 02:29:46,246 INFO L276 IsEmpty]: Start isEmpty. Operand 3619 states and 5568 transitions. [2021-11-23 02:29:46,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-23 02:29:46,256 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:29:46,257 INFO L514 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:29:46,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6af8b3c6-cb27-443c-9a32-68f79c509e71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:29:46,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6af8b3c6-cb27-443c-9a32-68f79c509e71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:29:46,473 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:29:46,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:29:46,474 INFO L85 PathProgramCache]: Analyzing trace with hash -1033887675, now seen corresponding path program 1 times [2021-11-23 02:29:46,474 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:29:46,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684166515] [2021-11-23 02:29:46,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:29:46,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:29:48,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:44,951 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 55 proven. 2 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-23 02:30:44,952 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:30:44,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684166515] [2021-11-23 02:30:44,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684166515] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:30:44,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976999645] [2021-11-23 02:30:44,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:30:44,953 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:30:44,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6af8b3c6-cb27-443c-9a32-68f79c509e71/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:30:44,962 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6af8b3c6-cb27-443c-9a32-68f79c509e71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:30:44,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6af8b3c6-cb27-443c-9a32-68f79c509e71/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:30:52,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:30:52,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 4506 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-23 02:30:52,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:30:53,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 02:30:53,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-23 02:30:58,104 INFO L354 Elim1Store]: treesize reduction 3059, result has 22.2 percent of original size [2021-11-23 02:30:58,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 3 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 2154 treesize of output 2401 [2021-11-23 02:31:01,580 INFO L354 Elim1Store]: treesize reduction 1857, result has 27.0 percent of original size [2021-11-23 02:31:01,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 6 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 9 new quantified variables, introduced 23 case distinctions, treesize of input 3828 treesize of output 3204 [2021-11-23 02:31:02,192 INFO L354 Elim1Store]: treesize reduction 150, result has 37.2 percent of original size [2021-11-23 02:31:02,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 2970 treesize of output 2696 [2021-11-23 02:31:03,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:03,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:03,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:03,049 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:31:03,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 39 [2021-11-23 02:31:03,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:03,356 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-11-23 02:31:03,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 39 [2021-11-23 02:31:03,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:03,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:03,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:31:03,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 39 [2021-11-23 02:31:03,608 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:31:03,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:03,954 INFO L354 Elim1Store]: treesize reduction 52, result has 35.8 percent of original size [2021-11-23 02:31:03,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 66 treesize of output 70 [2021-11-23 02:31:04,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:04,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:04,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:31:04,380 INFO L354 Elim1Store]: treesize reduction 19, result has 42.4 percent of original size [2021-11-23 02:31:04,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 66 treesize of output 56 [2021-11-23 02:31:04,510 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:31:04,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:04,972 INFO L354 Elim1Store]: treesize reduction 72, result has 29.4 percent of original size [2021-11-23 02:31:04,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 73 treesize of output 71 [2021-11-23 02:31:05,217 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:31:05,403 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:31:05,487 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:31:05,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:05,976 INFO L354 Elim1Store]: treesize reduction 69, result has 32.4 percent of original size [2021-11-23 02:31:05,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 73 treesize of output 74 [2021-11-23 02:31:06,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:06,620 INFO L354 Elim1Store]: treesize reduction 126, result has 27.2 percent of original size [2021-11-23 02:31:06,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 82 treesize of output 91 [2021-11-23 02:31:08,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:08,504 INFO L354 Elim1Store]: treesize reduction 19, result has 42.4 percent of original size [2021-11-23 02:31:08,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 53 [2021-11-23 02:31:08,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:08,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:08,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:08,897 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:31:08,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 57 treesize of output 39 [2021-11-23 02:31:09,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:09,324 INFO L354 Elim1Store]: treesize reduction 67, result has 17.3 percent of original size [2021-11-23 02:31:09,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 66 treesize of output 56 [2021-11-23 02:31:09,643 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:31:11,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:11,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:11,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:31:11,619 INFO L354 Elim1Store]: treesize reduction 27, result has 42.6 percent of original size [2021-11-23 02:31:11,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 74 [2021-11-23 02:31:12,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:12,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:12,046 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:31:12,089 INFO L354 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2021-11-23 02:31:12,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 54 [2021-11-23 02:31:12,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:12,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:12,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:31:12,393 INFO L354 Elim1Store]: treesize reduction 46, result has 2.1 percent of original size [2021-11-23 02:31:12,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 54 [2021-11-23 02:31:12,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:12,823 INFO L354 Elim1Store]: treesize reduction 47, result has 53.9 percent of original size [2021-11-23 02:31:12,823 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 85 treesize of output 108 [2021-11-23 02:31:14,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:14,663 INFO L354 Elim1Store]: treesize reduction 26, result has 35.0 percent of original size [2021-11-23 02:31:14,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 76 treesize of output 65 [2021-11-23 02:31:15,126 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:31:15,327 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:31:15,505 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:31:17,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:31:17,574 INFO L354 Elim1Store]: treesize reduction 66, result has 63.9 percent of original size [2021-11-23 02:31:17,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 145 treesize of output 217 [2021-11-23 02:31:21,596 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:31:21,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1875 treesize of output 1847 [2021-11-23 02:31:21,951 INFO L354 Elim1Store]: treesize reduction 66, result has 63.1 percent of original size [2021-11-23 02:31:21,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1847 treesize of output 1878 [2021-11-23 02:31:22,042 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:31:22,042 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1878 treesize of output 1864 [2021-11-23 02:31:22,436 INFO L354 Elim1Store]: treesize reduction 66, result has 63.1 percent of original size [2021-11-23 02:31:22,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1864 treesize of output 1914