./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7134cf-6808-4378-9443-1562a6222f56/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7134cf-6808-4378-9443-1562a6222f56/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7134cf-6808-4378-9443-1562a6222f56/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7134cf-6808-4378-9443-1562a6222f56/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7134cf-6808-4378-9443-1562a6222f56/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7134cf-6808-4378-9443-1562a6222f56/bin/utaipan-TEXQjIfE4P --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 73338d683e10a9827a18cf31e1247b64129367b1297cba22c91c243b4552d29d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-21 00:49:43,933 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-21 00:49:43,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-21 00:49:43,965 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-21 00:49:43,966 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-21 00:49:43,967 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-21 00:49:43,969 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-21 00:49:43,971 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-21 00:49:43,973 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-21 00:49:43,974 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-21 00:49:43,976 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-21 00:49:43,977 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-21 00:49:43,978 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-21 00:49:43,979 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-21 00:49:43,981 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-21 00:49:43,982 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-21 00:49:43,983 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-21 00:49:43,984 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-21 00:49:43,986 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-21 00:49:43,989 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-21 00:49:43,991 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-21 00:49:43,993 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-21 00:49:43,994 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-21 00:49:43,995 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-21 00:49:43,999 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-21 00:49:43,999 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-21 00:49:44,000 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-21 00:49:44,001 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-21 00:49:44,002 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-21 00:49:44,003 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-21 00:49:44,003 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-21 00:49:44,004 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-21 00:49:44,005 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-21 00:49:44,006 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-21 00:49:44,007 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-21 00:49:44,009 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-21 00:49:44,010 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-21 00:49:44,011 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-21 00:49:44,011 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-21 00:49:44,012 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-21 00:49:44,013 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-21 00:49:44,014 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7134cf-6808-4378-9443-1562a6222f56/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-21 00:49:44,068 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-21 00:49:44,068 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-21 00:49:44,069 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-21 00:49:44,069 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-21 00:49:44,076 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-21 00:49:44,077 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-21 00:49:44,077 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-21 00:49:44,077 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-21 00:49:44,077 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-21 00:49:44,078 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-21 00:49:44,079 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-21 00:49:44,079 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-21 00:49:44,079 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-21 00:49:44,080 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-21 00:49:44,080 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-21 00:49:44,080 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-21 00:49:44,080 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-21 00:49:44,081 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-21 00:49:44,081 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-21 00:49:44,082 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-21 00:49:44,082 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-21 00:49:44,082 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-21 00:49:44,082 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-21 00:49:44,082 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-21 00:49:44,083 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-21 00:49:44,083 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-21 00:49:44,085 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-21 00:49:44,085 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-21 00:49:44,086 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-21 00:49:44,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:49:44,086 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-21 00:49:44,086 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-21 00:49:44,087 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-21 00:49:44,087 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-21 00:49:44,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-21 00:49:44,087 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-21 00:49:44,088 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-21 00:49:44,088 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-21 00:49:44,088 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_df7134cf-6808-4378-9443-1562a6222f56/bin/utaipan-TEXQjIfE4P/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7134cf-6808-4378-9443-1562a6222f56/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 73338d683e10a9827a18cf31e1247b64129367b1297cba22c91c243b4552d29d [2021-11-21 00:49:44,362 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-21 00:49:44,390 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-21 00:49:44,393 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-21 00:49:44,395 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-21 00:49:44,396 INFO L275 PluginConnector]: CDTParser initialized [2021-11-21 00:49:44,397 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7134cf-6808-4378-9443-1562a6222f56/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-21 00:49:44,492 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7134cf-6808-4378-9443-1562a6222f56/bin/utaipan-TEXQjIfE4P/data/d0f1ee18c/94600116eb6a4027be9468a9ef793e25/FLAG88ad1221b [2021-11-21 00:49:45,297 INFO L306 CDTParser]: Found 1 translation units. [2021-11-21 00:49:45,298 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7134cf-6808-4378-9443-1562a6222f56/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-21 00:49:45,328 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7134cf-6808-4378-9443-1562a6222f56/bin/utaipan-TEXQjIfE4P/data/d0f1ee18c/94600116eb6a4027be9468a9ef793e25/FLAG88ad1221b [2021-11-21 00:49:45,799 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7134cf-6808-4378-9443-1562a6222f56/bin/utaipan-TEXQjIfE4P/data/d0f1ee18c/94600116eb6a4027be9468a9ef793e25 [2021-11-21 00:49:45,801 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-21 00:49:45,803 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-21 00:49:45,804 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-21 00:49:45,805 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-21 00:49:45,808 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-21 00:49:45,810 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:49:45" (1/1) ... [2021-11-21 00:49:45,813 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f53b160 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:45, skipping insertion in model container [2021-11-21 00:49:45,813 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 12:49:45" (1/1) ... [2021-11-21 00:49:45,821 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-21 00:49:45,915 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-21 00:49:47,055 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_df7134cf-6808-4378-9443-1562a6222f56/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i[116401,116414] [2021-11-21 00:49:47,604 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:49:47,681 INFO L203 MainTranslator]: Completed pre-run [2021-11-21 00:49:47,774 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_df7134cf-6808-4378-9443-1562a6222f56/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i[116401,116414] [2021-11-21 00:49:48,029 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-21 00:49:48,233 INFO L208 MainTranslator]: Completed translation [2021-11-21 00:49:48,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:48 WrapperNode [2021-11-21 00:49:48,233 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-21 00:49:48,234 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-21 00:49:48,235 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-21 00:49:48,235 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-21 00:49:48,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:48" (1/1) ... [2021-11-21 00:49:48,387 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:48" (1/1) ... [2021-11-21 00:49:48,617 INFO L137 Inliner]: procedures = 245, calls = 3306, calls flagged for inlining = 118, calls inlined = 118, statements flattened = 6412 [2021-11-21 00:49:48,618 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-21 00:49:48,618 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-21 00:49:48,619 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-21 00:49:48,619 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-21 00:49:48,634 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:48" (1/1) ... [2021-11-21 00:49:48,635 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:48" (1/1) ... [2021-11-21 00:49:48,694 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:48" (1/1) ... [2021-11-21 00:49:48,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:48" (1/1) ... [2021-11-21 00:49:48,902 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:48" (1/1) ... [2021-11-21 00:49:48,935 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:48" (1/1) ... [2021-11-21 00:49:48,972 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:48" (1/1) ... [2021-11-21 00:49:49,070 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-21 00:49:49,071 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-21 00:49:49,072 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-21 00:49:49,072 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-21 00:49:49,073 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:48" (1/1) ... [2021-11-21 00:49:49,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-21 00:49:49,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7134cf-6808-4378-9443-1562a6222f56/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:49:49,109 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7134cf-6808-4378-9443-1562a6222f56/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-21 00:49:49,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7134cf-6808-4378-9443-1562a6222f56/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-21 00:49:49,158 INFO L130 BoogieDeclarations]: Found specification of procedure acm_disconnect [2021-11-21 00:49:49,158 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_disconnect [2021-11-21 00:49:49,158 INFO L130 BoogieDeclarations]: Found specification of procedure tty_port_tty_hangup [2021-11-21 00:49:49,159 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_port_tty_hangup [2021-11-21 00:49:49,159 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_18 [2021-11-21 00:49:49,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_18 [2021-11-21 00:49:49,159 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-21 00:49:49,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-21 00:49:49,159 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-21 00:49:49,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-21 00:49:49,160 INFO L130 BoogieDeclarations]: Found specification of procedure acm_port_destruct [2021-11-21 00:49:49,160 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_port_destruct [2021-11-21 00:49:49,160 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_int [2021-11-21 00:49:49,160 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_int [2021-11-21 00:49:49,160 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2021-11-21 00:49:49,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2021-11-21 00:49:49,161 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_22 [2021-11-21 00:49:49,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_22 [2021-11-21 00:49:49,161 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_cleanup [2021-11-21 00:49:49,162 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_cleanup [2021-11-21 00:49:49,162 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-21 00:49:49,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-21 00:49:49,162 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_maxp [2021-11-21 00:49:49,163 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_maxp [2021-11-21 00:49:49,163 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2021-11-21 00:49:49,163 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2021-11-21 00:49:49,163 INFO L130 BoogieDeclarations]: Found specification of procedure acm_write_buffers_free [2021-11-21 00:49:49,164 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_write_buffers_free [2021-11-21 00:49:49,164 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-21 00:49:49,164 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-21 00:49:49,164 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-21 00:49:49,164 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-21 00:49:49,165 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_in [2021-11-21 00:49:49,165 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_in [2021-11-21 00:49:49,165 INFO L130 BoogieDeclarations]: Found specification of procedure device_create_file [2021-11-21 00:49:49,165 INFO L138 BoogieDeclarations]: Found implementation of procedure device_create_file [2021-11-21 00:49:49,165 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-21 00:49:49,166 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-21 00:49:49,166 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-21 00:49:49,166 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-21 00:49:49,166 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2021-11-21 00:49:49,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2021-11-21 00:49:49,167 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-21 00:49:49,167 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-21 00:49:49,167 INFO L130 BoogieDeclarations]: Found specification of procedure tty_port_put [2021-11-21 00:49:49,167 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_port_put [2021-11-21 00:49:49,167 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_chars_in_buffer [2021-11-21 00:49:49,168 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_chars_in_buffer [2021-11-21 00:49:49,168 INFO L130 BoogieDeclarations]: Found specification of procedure acm_resume [2021-11-21 00:49:49,169 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_resume [2021-11-21 00:49:49,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-21 00:49:49,169 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-11-21 00:49:49,170 INFO L130 BoogieDeclarations]: Found specification of procedure acm_ctrl_msg [2021-11-21 00:49:49,170 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_ctrl_msg [2021-11-21 00:49:49,170 INFO L130 BoogieDeclarations]: Found specification of procedure usb_free_coherent [2021-11-21 00:49:49,170 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_free_coherent [2021-11-21 00:49:49,171 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-21 00:49:49,172 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_hangup [2021-11-21 00:49:49,172 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_hangup [2021-11-21 00:49:49,172 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ifnum_to_if [2021-11-21 00:49:49,172 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ifnum_to_if [2021-11-21 00:49:49,173 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2021-11-21 00:49:49,173 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-21 00:49:49,173 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-21 00:49:49,173 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_get_interface [2021-11-21 00:49:49,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_get_interface [2021-11-21 00:49:49,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-21 00:49:49,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-21 00:49:49,174 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-21 00:49:49,174 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-21 00:49:49,174 INFO L130 BoogieDeclarations]: Found specification of procedure put_tty_driver [2021-11-21 00:49:49,174 INFO L138 BoogieDeclarations]: Found implementation of procedure put_tty_driver [2021-11-21 00:49:49,174 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-21 00:49:49,174 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-21 00:49:49,175 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-21 00:49:49,175 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-21 00:49:49,175 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-21 00:49:49,175 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-21 00:49:49,175 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_tiocmget [2021-11-21 00:49:49,175 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_tiocmget [2021-11-21 00:49:49,176 INFO L130 BoogieDeclarations]: Found specification of procedure acm_port_shutdown [2021-11-21 00:49:49,176 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_port_shutdown [2021-11-21 00:49:49,176 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_put_interface [2021-11-21 00:49:49,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_put_interface [2021-11-21 00:49:49,177 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_set_termios [2021-11-21 00:49:49,177 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_set_termios [2021-11-21 00:49:49,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-21 00:49:49,177 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-21 00:49:49,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-21 00:49:49,178 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-21 00:49:49,178 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-21 00:49:49,179 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_break_ctl [2021-11-21 00:49:49,179 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_break_ctl [2021-11-21 00:49:49,180 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-21 00:49:49,180 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-21 00:49:49,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-21 00:49:49,180 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_7 [2021-11-21 00:49:49,180 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_7 [2021-11-21 00:49:49,181 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_6 [2021-11-21 00:49:49,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_6 [2021-11-21 00:49:49,181 INFO L130 BoogieDeclarations]: Found specification of procedure usb_mark_last_busy [2021-11-21 00:49:49,181 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_mark_last_busy [2021-11-21 00:49:49,181 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-21 00:49:49,181 INFO L130 BoogieDeclarations]: Found specification of procedure acm_start_wb [2021-11-21 00:49:49,181 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_start_wb [2021-11-21 00:49:49,182 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2021-11-21 00:49:49,182 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2021-11-21 00:49:49,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-21 00:49:49,182 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-21 00:49:49,183 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-21 00:49:49,183 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-21 00:49:49,184 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_throttle [2021-11-21 00:49:49,186 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_throttle [2021-11-21 00:49:49,186 INFO L130 BoogieDeclarations]: Found specification of procedure acm_wb_is_avail [2021-11-21 00:49:49,187 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_wb_is_avail [2021-11-21 00:49:49,187 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-21 00:49:49,188 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-21 00:49:49,189 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-21 00:49:49,189 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-21 00:49:49,189 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_write_room [2021-11-21 00:49:49,189 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_write_room [2021-11-21 00:49:49,196 INFO L130 BoogieDeclarations]: Found specification of procedure acm_submit_read_urb [2021-11-21 00:49:49,196 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_submit_read_urb [2021-11-21 00:49:49,196 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-21 00:49:49,196 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-21 00:49:49,197 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-21 00:49:49,197 INFO L130 BoogieDeclarations]: Found specification of procedure acm_write_done [2021-11-21 00:49:49,197 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_write_done [2021-11-21 00:49:49,197 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_ioctl [2021-11-21 00:49:49,197 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_ioctl [2021-11-21 00:49:49,197 INFO L130 BoogieDeclarations]: Found specification of procedure acm_release_minor [2021-11-21 00:49:49,197 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_release_minor [2021-11-21 00:49:49,198 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2021-11-21 00:49:49,198 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2021-11-21 00:49:49,198 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-21 00:49:49,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-21 00:49:49,198 INFO L130 BoogieDeclarations]: Found specification of procedure usb_autopm_put_interface_async [2021-11-21 00:49:49,198 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_autopm_put_interface_async [2021-11-21 00:49:49,198 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_unthrottle [2021-11-21 00:49:49,198 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_unthrottle [2021-11-21 00:49:49,199 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-21 00:49:49,199 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_get_intfdata_3 [2021-11-21 00:49:49,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_get_intfdata_3 [2021-11-21 00:49:49,199 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-21 00:49:49,199 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-21 00:49:49,199 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-21 00:49:49,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-21 00:49:49,200 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_int_urb_17 [2021-11-21 00:49:49,200 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_int_urb_17 [2021-11-21 00:49:49,201 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-21 00:49:49,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-21 00:49:49,201 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2021-11-21 00:49:49,201 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2021-11-21 00:49:49,201 INFO L130 BoogieDeclarations]: Found specification of procedure usb_alloc_coherent [2021-11-21 00:49:49,201 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_alloc_coherent [2021-11-21 00:49:49,201 INFO L130 BoogieDeclarations]: Found specification of procedure acm_read_buffers_free [2021-11-21 00:49:49,202 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_read_buffers_free [2021-11-21 00:49:49,202 INFO L130 BoogieDeclarations]: Found specification of procedure acm_ctrl_irq [2021-11-21 00:49:49,202 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_ctrl_irq [2021-11-21 00:49:49,202 INFO L130 BoogieDeclarations]: Found specification of procedure acm_submit_read_urbs [2021-11-21 00:49:49,202 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_submit_read_urbs [2021-11-21 00:49:49,202 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_install [2021-11-21 00:49:49,202 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_install [2021-11-21 00:49:49,203 INFO L130 BoogieDeclarations]: Found specification of procedure stop_data_traffic [2021-11-21 00:49:49,203 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_data_traffic [2021-11-21 00:49:49,203 INFO L130 BoogieDeclarations]: Found specification of procedure set_bit [2021-11-21 00:49:49,203 INFO L138 BoogieDeclarations]: Found implementation of procedure set_bit [2021-11-21 00:49:49,203 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2021-11-21 00:49:49,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2021-11-21 00:49:49,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-21 00:49:49,204 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2021-11-21 00:49:49,204 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2021-11-21 00:49:49,204 INFO L130 BoogieDeclarations]: Found specification of procedure device_remove_file [2021-11-21 00:49:49,204 INFO L138 BoogieDeclarations]: Found implementation of procedure device_remove_file [2021-11-21 00:49:49,204 INFO L130 BoogieDeclarations]: Found specification of procedure acm_tty_tiocmset [2021-11-21 00:49:49,204 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_tty_tiocmset [2021-11-21 00:49:49,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-21 00:49:49,205 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-21 00:49:49,205 INFO L130 BoogieDeclarations]: Found specification of procedure tty_unregister_driver [2021-11-21 00:49:49,205 INFO L138 BoogieDeclarations]: Found implementation of procedure tty_unregister_driver [2021-11-21 00:49:49,205 INFO L130 BoogieDeclarations]: Found specification of procedure acm_read_bulk_callback [2021-11-21 00:49:49,205 INFO L138 BoogieDeclarations]: Found implementation of procedure acm_read_bulk_callback [2021-11-21 00:49:49,205 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-21 00:49:49,205 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-21 00:49:50,067 INFO L236 CfgBuilder]: Building ICFG [2021-11-21 00:49:50,073 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-21 00:49:50,416 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-21 00:49:51,111 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2021-11-21 00:49:59,169 INFO L277 CfgBuilder]: Performing block encoding [2021-11-21 00:50:00,289 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-21 00:50:00,290 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-21 00:50:00,295 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:50:00 BoogieIcfgContainer [2021-11-21 00:50:00,295 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-21 00:50:00,297 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-21 00:50:00,297 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-21 00:50:00,305 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-21 00:50:00,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 12:49:45" (1/3) ... [2021-11-21 00:50:00,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36941252 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:50:00, skipping insertion in model container [2021-11-21 00:50:00,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 12:49:48" (2/3) ... [2021-11-21 00:50:00,312 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36941252 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 12:50:00, skipping insertion in model container [2021-11-21 00:50:00,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 12:50:00" (3/3) ... [2021-11-21 00:50:00,315 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--usb--class--cdc-acm.ko-entry_point.cil.out.i [2021-11-21 00:50:00,320 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-21 00:50:00,320 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-21 00:50:00,378 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-21 00:50:00,385 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-21 00:50:00,385 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-21 00:50:00,437 INFO L276 IsEmpty]: Start isEmpty. Operand has 1137 states, 708 states have (on average 1.3573446327683616) internal successors, (961), 744 states have internal predecessors, (961), 346 states have call successors, (346), 83 states have call predecessors, (346), 81 states have return successors, (335), 327 states have call predecessors, (335), 335 states have call successors, (335) [2021-11-21 00:50:00,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-21 00:50:00,467 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:50:00,468 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:50:00,468 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:50:00,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:50:00,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1213321231, now seen corresponding path program 1 times [2021-11-21 00:50:00,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:50:00,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723334983] [2021-11-21 00:50:00,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:50:00,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:50:00,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:50:01,440 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-21 00:50:01,441 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:50:01,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723334983] [2021-11-21 00:50:01,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723334983] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:50:01,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:50:01,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-21 00:50:01,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924633100] [2021-11-21 00:50:01,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:50:01,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:50:01,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:50:01,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:50:01,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-21 00:50:01,477 INFO L87 Difference]: Start difference. First operand has 1137 states, 708 states have (on average 1.3573446327683616) internal successors, (961), 744 states have internal predecessors, (961), 346 states have call successors, (346), 83 states have call predecessors, (346), 81 states have return successors, (335), 327 states have call predecessors, (335), 335 states have call successors, (335) Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-21 00:50:04,995 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:50:07,452 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:50:16,446 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:50:17,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:50:17,373 INFO L93 Difference]: Finished difference Result 4091 states and 5975 transitions. [2021-11-21 00:50:17,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-21 00:50:17,376 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) Word has length 110 [2021-11-21 00:50:17,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:50:17,437 INFO L225 Difference]: With dead ends: 4091 [2021-11-21 00:50:17,438 INFO L226 Difference]: Without dead ends: 2944 [2021-11-21 00:50:17,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:50:17,460 INFO L933 BasicCegarLoop]: 2226 mSDtfsCounter, 3298 mSDsluCounter, 7743 mSDsCounter, 0 mSdLazyCounter, 4700 mSolverCounterSat, 450 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3401 SdHoareTripleChecker+Valid, 8712 SdHoareTripleChecker+Invalid, 5153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 4700 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:50:17,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3401 Valid, 8712 Invalid, 5153 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [450 Valid, 4700 Invalid, 3 Unknown, 0 Unchecked, 15.3s Time] [2021-11-21 00:50:17,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2944 states. [2021-11-21 00:50:17,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2944 to 2907. [2021-11-21 00:50:17,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2907 states, 1857 states have (on average 1.3527194399569198) internal successors, (2512), 1912 states have internal predecessors, (2512), 828 states have call successors, (828), 222 states have call predecessors, (828), 221 states have return successors, (822), 798 states have call predecessors, (822), 822 states have call successors, (822) [2021-11-21 00:50:17,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2907 states to 2907 states and 4162 transitions. [2021-11-21 00:50:17,792 INFO L78 Accepts]: Start accepts. Automaton has 2907 states and 4162 transitions. Word has length 110 [2021-11-21 00:50:17,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:50:17,794 INFO L470 AbstractCegarLoop]: Abstraction has 2907 states and 4162 transitions. [2021-11-21 00:50:17,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 2 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 2 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-21 00:50:17,795 INFO L276 IsEmpty]: Start isEmpty. Operand 2907 states and 4162 transitions. [2021-11-21 00:50:17,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-21 00:50:17,805 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:50:17,806 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:50:17,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-21 00:50:17,807 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:50:17,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:50:17,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1017983192, now seen corresponding path program 1 times [2021-11-21 00:50:17,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:50:17,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866387427] [2021-11-21 00:50:17,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:50:17,813 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:50:18,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:50:18,382 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-21 00:50:18,383 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:50:18,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866387427] [2021-11-21 00:50:18,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866387427] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:50:18,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:50:18,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:50:18,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796444835] [2021-11-21 00:50:18,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:50:18,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:50:18,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:50:18,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:50:18,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:50:18,386 INFO L87 Difference]: Start difference. First operand 2907 states and 4162 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-21 00:50:21,153 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:50:24,557 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:50:24,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:50:24,782 INFO L93 Difference]: Finished difference Result 5624 states and 8040 transitions. [2021-11-21 00:50:24,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:50:24,782 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 121 [2021-11-21 00:50:24,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:50:24,828 INFO L225 Difference]: With dead ends: 5624 [2021-11-21 00:50:24,829 INFO L226 Difference]: Without dead ends: 5621 [2021-11-21 00:50:24,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:50:24,837 INFO L933 BasicCegarLoop]: 1916 mSDtfsCounter, 1331 mSDsluCounter, 1553 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1331 SdHoareTripleChecker+Valid, 3276 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:50:24,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1331 Valid, 3276 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 464 Invalid, 2 Unknown, 0 Unchecked, 6.1s Time] [2021-11-21 00:50:24,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5621 states. [2021-11-21 00:50:25,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5621 to 5602. [2021-11-21 00:50:25,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5602 states, 3594 states have (on average 1.3561491374513077) internal successors, (4874), 3697 states have internal predecessors, (4874), 1573 states have call successors, (1573), 435 states have call predecessors, (1573), 434 states have return successors, (1567), 1519 states have call predecessors, (1567), 1567 states have call successors, (1567) [2021-11-21 00:50:25,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5602 states to 5602 states and 8014 transitions. [2021-11-21 00:50:25,168 INFO L78 Accepts]: Start accepts. Automaton has 5602 states and 8014 transitions. Word has length 121 [2021-11-21 00:50:25,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:50:25,169 INFO L470 AbstractCegarLoop]: Abstraction has 5602 states and 8014 transitions. [2021-11-21 00:50:25,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-21 00:50:25,169 INFO L276 IsEmpty]: Start isEmpty. Operand 5602 states and 8014 transitions. [2021-11-21 00:50:25,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-21 00:50:25,180 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:50:25,181 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:50:25,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-21 00:50:25,181 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:50:25,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:50:25,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1492005153, now seen corresponding path program 1 times [2021-11-21 00:50:25,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:50:25,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229004144] [2021-11-21 00:50:25,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:50:25,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:50:25,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:50:25,568 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-21 00:50:25,569 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:50:25,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229004144] [2021-11-21 00:50:25,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229004144] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:50:25,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:50:25,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:50:25,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830531897] [2021-11-21 00:50:25,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:50:25,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:50:25,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:50:25,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:50:25,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:50:25,574 INFO L87 Difference]: Start difference. First operand 5602 states and 8014 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-21 00:50:28,157 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:50:31,712 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:50:31,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:50:31,965 INFO L93 Difference]: Finished difference Result 5623 states and 8038 transitions. [2021-11-21 00:50:31,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:50:31,966 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 122 [2021-11-21 00:50:31,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:50:32,015 INFO L225 Difference]: With dead ends: 5623 [2021-11-21 00:50:32,015 INFO L226 Difference]: Without dead ends: 5620 [2021-11-21 00:50:32,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:50:32,023 INFO L933 BasicCegarLoop]: 1918 mSDtfsCounter, 1329 mSDsluCounter, 1559 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1329 SdHoareTripleChecker+Valid, 3280 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:50:32,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1329 Valid, 3280 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 460 Invalid, 2 Unknown, 0 Unchecked, 6.1s Time] [2021-11-21 00:50:32,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5620 states. [2021-11-21 00:50:32,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5620 to 5603. [2021-11-21 00:50:32,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5603 states, 3595 states have (on average 1.3560500695410291) internal successors, (4875), 3698 states have internal predecessors, (4875), 1573 states have call successors, (1573), 435 states have call predecessors, (1573), 434 states have return successors, (1567), 1519 states have call predecessors, (1567), 1567 states have call successors, (1567) [2021-11-21 00:50:32,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5603 states to 5603 states and 8015 transitions. [2021-11-21 00:50:32,431 INFO L78 Accepts]: Start accepts. Automaton has 5603 states and 8015 transitions. Word has length 122 [2021-11-21 00:50:32,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:50:32,432 INFO L470 AbstractCegarLoop]: Abstraction has 5603 states and 8015 transitions. [2021-11-21 00:50:32,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-21 00:50:32,433 INFO L276 IsEmpty]: Start isEmpty. Operand 5603 states and 8015 transitions. [2021-11-21 00:50:32,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-21 00:50:32,438 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:50:32,438 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:50:32,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-21 00:50:32,438 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:50:32,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:50:32,439 INFO L85 PathProgramCache]: Analyzing trace with hash -993178373, now seen corresponding path program 1 times [2021-11-21 00:50:32,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:50:32,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803855872] [2021-11-21 00:50:32,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:50:32,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:50:32,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:50:32,802 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-21 00:50:32,802 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:50:32,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803855872] [2021-11-21 00:50:32,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803855872] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:50:32,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:50:32,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:50:32,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133240332] [2021-11-21 00:50:32,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:50:32,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:50:32,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:50:32,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:50:32,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:50:32,807 INFO L87 Difference]: Start difference. First operand 5603 states and 8015 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-21 00:50:35,631 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:50:38,973 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:50:39,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:50:39,191 INFO L93 Difference]: Finished difference Result 5618 states and 8031 transitions. [2021-11-21 00:50:39,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:50:39,191 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 123 [2021-11-21 00:50:39,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:50:39,231 INFO L225 Difference]: With dead ends: 5618 [2021-11-21 00:50:39,232 INFO L226 Difference]: Without dead ends: 5615 [2021-11-21 00:50:39,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:50:39,237 INFO L933 BasicCegarLoop]: 1918 mSDtfsCounter, 1326 mSDsluCounter, 1554 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1326 SdHoareTripleChecker+Valid, 3275 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:50:39,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1326 Valid, 3275 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 459 Invalid, 2 Unknown, 0 Unchecked, 6.2s Time] [2021-11-21 00:50:39,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5615 states. [2021-11-21 00:50:39,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5615 to 5604. [2021-11-21 00:50:39,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5604 states, 3596 states have (on average 1.3559510567296997) internal successors, (4876), 3699 states have internal predecessors, (4876), 1573 states have call successors, (1573), 435 states have call predecessors, (1573), 434 states have return successors, (1567), 1519 states have call predecessors, (1567), 1567 states have call successors, (1567) [2021-11-21 00:50:39,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5604 states to 5604 states and 8016 transitions. [2021-11-21 00:50:39,615 INFO L78 Accepts]: Start accepts. Automaton has 5604 states and 8016 transitions. Word has length 123 [2021-11-21 00:50:39,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:50:39,616 INFO L470 AbstractCegarLoop]: Abstraction has 5604 states and 8016 transitions. [2021-11-21 00:50:39,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-21 00:50:39,617 INFO L276 IsEmpty]: Start isEmpty. Operand 5604 states and 8016 transitions. [2021-11-21 00:50:39,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-21 00:50:39,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:50:39,622 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:50:39,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-21 00:50:39,622 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:50:39,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:50:39,623 INFO L85 PathProgramCache]: Analyzing trace with hash -724451484, now seen corresponding path program 1 times [2021-11-21 00:50:39,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:50:39,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100965553] [2021-11-21 00:50:39,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:50:39,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:50:39,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:50:39,904 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-21 00:50:39,905 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:50:39,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100965553] [2021-11-21 00:50:39,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100965553] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:50:39,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:50:39,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:50:39,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391264012] [2021-11-21 00:50:39,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:50:39,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:50:39,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:50:39,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:50:39,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:50:39,909 INFO L87 Difference]: Start difference. First operand 5604 states and 8016 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-21 00:50:42,684 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:50:44,851 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:50:47,896 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:50:48,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:50:48,119 INFO L93 Difference]: Finished difference Result 8177 states and 11753 transitions. [2021-11-21 00:50:48,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:50:48,120 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 124 [2021-11-21 00:50:48,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:50:48,177 INFO L225 Difference]: With dead ends: 8177 [2021-11-21 00:50:48,177 INFO L226 Difference]: Without dead ends: 8174 [2021-11-21 00:50:48,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:50:48,183 INFO L933 BasicCegarLoop]: 1896 mSDtfsCounter, 1252 mSDsluCounter, 1578 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1252 SdHoareTripleChecker+Valid, 3279 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:50:48,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1252 Valid, 3279 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 465 Invalid, 3 Unknown, 0 Unchecked, 8.0s Time] [2021-11-21 00:50:48,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8174 states. [2021-11-21 00:50:48,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8174 to 8155. [2021-11-21 00:50:48,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8155 states, 5243 states have (on average 1.3593362578676331) internal successors, (7127), 5400 states have internal predecessors, (7127), 2270 states have call successors, (2270), 645 states have call predecessors, (2270), 641 states have return successors, (2333), 2183 states have call predecessors, (2333), 2264 states have call successors, (2333) [2021-11-21 00:50:48,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8155 states to 8155 states and 11730 transitions. [2021-11-21 00:50:48,687 INFO L78 Accepts]: Start accepts. Automaton has 8155 states and 11730 transitions. Word has length 124 [2021-11-21 00:50:48,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:50:48,687 INFO L470 AbstractCegarLoop]: Abstraction has 8155 states and 11730 transitions. [2021-11-21 00:50:48,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-21 00:50:48,688 INFO L276 IsEmpty]: Start isEmpty. Operand 8155 states and 11730 transitions. [2021-11-21 00:50:48,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-21 00:50:48,692 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:50:48,692 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:50:48,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-21 00:50:48,692 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:50:48,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:50:48,693 INFO L85 PathProgramCache]: Analyzing trace with hash -983847650, now seen corresponding path program 1 times [2021-11-21 00:50:48,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:50:48,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845000824] [2021-11-21 00:50:48,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:50:48,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:50:48,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:50:48,987 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-21 00:50:48,988 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:50:48,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845000824] [2021-11-21 00:50:48,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845000824] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:50:48,988 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:50:48,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:50:48,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2811205] [2021-11-21 00:50:48,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:50:48,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:50:48,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:50:48,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:50:48,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:50:48,990 INFO L87 Difference]: Start difference. First operand 8155 states and 11730 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-21 00:50:51,434 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:50:54,677 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:50:54,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:50:54,893 INFO L93 Difference]: Finished difference Result 8172 states and 11748 transitions. [2021-11-21 00:50:54,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:50:54,893 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 125 [2021-11-21 00:50:54,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:50:54,937 INFO L225 Difference]: With dead ends: 8172 [2021-11-21 00:50:54,937 INFO L226 Difference]: Without dead ends: 8155 [2021-11-21 00:50:54,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:50:54,944 INFO L933 BasicCegarLoop]: 1847 mSDtfsCounter, 1322 mSDsluCounter, 1560 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1322 SdHoareTripleChecker+Valid, 3210 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:50:54,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1322 Valid, 3210 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 449 Invalid, 2 Unknown, 0 Unchecked, 5.7s Time] [2021-11-21 00:50:54,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8155 states. [2021-11-21 00:50:55,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8155 to 8143. [2021-11-21 00:50:55,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8143 states, 5235 states have (on average 1.3593123209169053) internal successors, (7116), 5392 states have internal predecessors, (7116), 2268 states have call successors, (2268), 643 states have call predecessors, (2268), 639 states have return successors, (2331), 2181 states have call predecessors, (2331), 2262 states have call successors, (2331) [2021-11-21 00:50:55,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8143 states to 8143 states and 11715 transitions. [2021-11-21 00:50:55,361 INFO L78 Accepts]: Start accepts. Automaton has 8143 states and 11715 transitions. Word has length 125 [2021-11-21 00:50:55,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:50:55,361 INFO L470 AbstractCegarLoop]: Abstraction has 8143 states and 11715 transitions. [2021-11-21 00:50:55,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-21 00:50:55,362 INFO L276 IsEmpty]: Start isEmpty. Operand 8143 states and 11715 transitions. [2021-11-21 00:50:55,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-21 00:50:55,367 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:50:55,367 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:50:55,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 00:50:55,368 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:50:55,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:50:55,368 INFO L85 PathProgramCache]: Analyzing trace with hash 431759152, now seen corresponding path program 1 times [2021-11-21 00:50:55,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:50:55,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356735861] [2021-11-21 00:50:55,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:50:55,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:50:55,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:50:55,710 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-21 00:50:55,711 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:50:55,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356735861] [2021-11-21 00:50:55,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356735861] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:50:55,711 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:50:55,712 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:50:55,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964268979] [2021-11-21 00:50:55,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:50:55,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:50:55,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:50:55,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:50:55,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:50:55,714 INFO L87 Difference]: Start difference. First operand 8143 states and 11715 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-21 00:50:58,787 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:51:00,900 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:51:03,164 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:51:05,742 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:51:05,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:51:05,819 INFO L93 Difference]: Finished difference Result 10912 states and 15671 transitions. [2021-11-21 00:51:05,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:51:05,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 126 [2021-11-21 00:51:05,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:51:05,867 INFO L225 Difference]: With dead ends: 10912 [2021-11-21 00:51:05,867 INFO L226 Difference]: Without dead ends: 10909 [2021-11-21 00:51:05,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:51:05,876 INFO L933 BasicCegarLoop]: 1683 mSDtfsCounter, 1403 mSDsluCounter, 1555 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 1 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1403 SdHoareTripleChecker+Valid, 3044 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.9s IncrementalHoareTripleChecker+Time [2021-11-21 00:51:05,876 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1403 Valid, 3044 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 403 Invalid, 3 Unknown, 0 Unchecked, 9.9s Time] [2021-11-21 00:51:05,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10909 states. [2021-11-21 00:51:06,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10909 to 10897. [2021-11-21 00:51:06,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10897 states, 7005 states have (on average 1.3588865096359743) internal successors, (9519), 7212 states have internal predecessors, (9519), 3036 states have call successors, (3036), 860 states have call predecessors, (3036), 855 states have return successors, (3099), 2923 states have call predecessors, (3099), 3030 states have call successors, (3099) [2021-11-21 00:51:06,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10897 states to 10897 states and 15654 transitions. [2021-11-21 00:51:06,495 INFO L78 Accepts]: Start accepts. Automaton has 10897 states and 15654 transitions. Word has length 126 [2021-11-21 00:51:06,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:51:06,496 INFO L470 AbstractCegarLoop]: Abstraction has 10897 states and 15654 transitions. [2021-11-21 00:51:06,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-21 00:51:06,497 INFO L276 IsEmpty]: Start isEmpty. Operand 10897 states and 15654 transitions. [2021-11-21 00:51:06,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-21 00:51:06,501 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:51:06,501 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:51:06,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-21 00:51:06,501 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:51:06,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:51:06,503 INFO L85 PathProgramCache]: Analyzing trace with hash 498929097, now seen corresponding path program 1 times [2021-11-21 00:51:06,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:51:06,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009931364] [2021-11-21 00:51:06,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:51:06,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:51:06,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:51:06,786 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-21 00:51:06,786 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:51:06,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009931364] [2021-11-21 00:51:06,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009931364] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:51:06,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:51:06,787 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:51:06,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733062828] [2021-11-21 00:51:06,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:51:06,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:51:06,788 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:51:06,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:51:06,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:51:06,789 INFO L87 Difference]: Start difference. First operand 10897 states and 15654 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-21 00:51:09,469 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:51:11,923 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:51:12,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:51:12,705 INFO L93 Difference]: Finished difference Result 13625 states and 19549 transitions. [2021-11-21 00:51:12,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:51:12,705 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 127 [2021-11-21 00:51:12,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:51:12,769 INFO L225 Difference]: With dead ends: 13625 [2021-11-21 00:51:12,769 INFO L226 Difference]: Without dead ends: 13622 [2021-11-21 00:51:12,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:51:12,780 INFO L933 BasicCegarLoop]: 1680 mSDtfsCounter, 1343 mSDsluCounter, 1559 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 0 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1343 SdHoareTripleChecker+Valid, 3042 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-11-21 00:51:12,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1343 Valid, 3042 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 405 Invalid, 2 Unknown, 0 Unchecked, 5.6s Time] [2021-11-21 00:51:12,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13622 states. [2021-11-21 00:51:13,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13622 to 13605. [2021-11-21 00:51:13,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13605 states, 8751 states have (on average 1.3590446806079306) internal successors, (11893), 9006 states have internal predecessors, (11893), 3785 states have call successors, (3785), 1073 states have call predecessors, (3785), 1068 states have return successors, (3848), 3648 states have call predecessors, (3848), 3779 states have call successors, (3848) [2021-11-21 00:51:13,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13605 states to 13605 states and 19526 transitions. [2021-11-21 00:51:13,604 INFO L78 Accepts]: Start accepts. Automaton has 13605 states and 19526 transitions. Word has length 127 [2021-11-21 00:51:13,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:51:13,605 INFO L470 AbstractCegarLoop]: Abstraction has 13605 states and 19526 transitions. [2021-11-21 00:51:13,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-21 00:51:13,605 INFO L276 IsEmpty]: Start isEmpty. Operand 13605 states and 19526 transitions. [2021-11-21 00:51:13,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-21 00:51:13,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:51:13,610 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:51:13,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 00:51:13,611 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:51:13,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:51:13,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1713765037, now seen corresponding path program 1 times [2021-11-21 00:51:13,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:51:13,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818994597] [2021-11-21 00:51:13,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:51:13,612 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:51:13,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:51:13,951 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-21 00:51:13,951 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:51:13,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818994597] [2021-11-21 00:51:13,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818994597] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:51:13,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:51:13,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:51:13,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463851126] [2021-11-21 00:51:13,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:51:13,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:51:13,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:51:13,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:51:13,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:51:13,955 INFO L87 Difference]: Start difference. First operand 13605 states and 19526 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-21 00:51:16,957 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:51:19,437 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:51:20,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:51:20,219 INFO L93 Difference]: Finished difference Result 13620 states and 19542 transitions. [2021-11-21 00:51:20,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:51:20,220 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 128 [2021-11-21 00:51:20,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:51:20,290 INFO L225 Difference]: With dead ends: 13620 [2021-11-21 00:51:20,290 INFO L226 Difference]: Without dead ends: 13617 [2021-11-21 00:51:20,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:51:20,302 INFO L933 BasicCegarLoop]: 1680 mSDtfsCounter, 1340 mSDsluCounter, 1554 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1340 SdHoareTripleChecker+Valid, 3037 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:51:20,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1340 Valid, 3037 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 404 Invalid, 2 Unknown, 0 Unchecked, 6.0s Time] [2021-11-21 00:51:20,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13617 states. [2021-11-21 00:51:21,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13617 to 13606. [2021-11-21 00:51:21,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13606 states, 8752 states have (on average 1.3590036563071297) internal successors, (11894), 9007 states have internal predecessors, (11894), 3785 states have call successors, (3785), 1073 states have call predecessors, (3785), 1068 states have return successors, (3848), 3648 states have call predecessors, (3848), 3779 states have call successors, (3848) [2021-11-21 00:51:21,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13606 states to 13606 states and 19527 transitions. [2021-11-21 00:51:21,077 INFO L78 Accepts]: Start accepts. Automaton has 13606 states and 19527 transitions. Word has length 128 [2021-11-21 00:51:21,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:51:21,078 INFO L470 AbstractCegarLoop]: Abstraction has 13606 states and 19527 transitions. [2021-11-21 00:51:21,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-21 00:51:21,079 INFO L276 IsEmpty]: Start isEmpty. Operand 13606 states and 19527 transitions. [2021-11-21 00:51:21,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-21 00:51:21,085 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:51:21,086 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:51:21,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-21 00:51:21,086 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:51:21,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:51:21,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1587801588, now seen corresponding path program 1 times [2021-11-21 00:51:21,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:51:21,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998093461] [2021-11-21 00:51:21,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:51:21,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:51:21,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:51:21,370 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-21 00:51:21,370 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:51:21,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998093461] [2021-11-21 00:51:21,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998093461] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:51:21,371 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:51:21,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:51:21,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055360444] [2021-11-21 00:51:21,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:51:21,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:51:21,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:51:21,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:51:21,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:51:21,373 INFO L87 Difference]: Start difference. First operand 13606 states and 19527 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-21 00:51:24,864 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:51:27,745 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:51:28,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:51:28,108 INFO L93 Difference]: Finished difference Result 16200 states and 23292 transitions. [2021-11-21 00:51:28,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:51:28,109 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 129 [2021-11-21 00:51:28,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:51:28,184 INFO L225 Difference]: With dead ends: 16200 [2021-11-21 00:51:28,185 INFO L226 Difference]: Without dead ends: 16197 [2021-11-21 00:51:28,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:51:28,196 INFO L933 BasicCegarLoop]: 1745 mSDtfsCounter, 1266 mSDsluCounter, 1578 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1266 SdHoareTripleChecker+Valid, 3128 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-11-21 00:51:28,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1266 Valid, 3128 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 423 Invalid, 2 Unknown, 0 Unchecked, 6.3s Time] [2021-11-21 00:51:28,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16197 states. [2021-11-21 00:51:28,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16197 to 16169. [2021-11-21 00:51:28,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16169 states, 10407 states have (on average 1.3602383011434611) internal successors, (14156), 10716 states have internal predecessors, (14156), 4486 states have call successors, (4486), 1283 states have call predecessors, (4486), 1275 states have return successors, (4618), 4316 states have call predecessors, (4618), 4480 states have call successors, (4618) [2021-11-21 00:51:28,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16169 states to 16169 states and 23260 transitions. [2021-11-21 00:51:28,973 INFO L78 Accepts]: Start accepts. Automaton has 16169 states and 23260 transitions. Word has length 129 [2021-11-21 00:51:28,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:51:28,974 INFO L470 AbstractCegarLoop]: Abstraction has 16169 states and 23260 transitions. [2021-11-21 00:51:28,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-21 00:51:28,974 INFO L276 IsEmpty]: Start isEmpty. Operand 16169 states and 23260 transitions. [2021-11-21 00:51:28,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-21 00:51:28,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:51:28,980 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:51:28,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-21 00:51:28,980 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:51:28,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:51:28,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1977897098, now seen corresponding path program 1 times [2021-11-21 00:51:28,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:51:28,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275476882] [2021-11-21 00:51:28,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:51:28,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:51:29,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:51:29,245 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-21 00:51:29,245 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:51:29,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275476882] [2021-11-21 00:51:29,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275476882] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:51:29,246 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:51:29,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:51:29,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334874277] [2021-11-21 00:51:29,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:51:29,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:51:29,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:51:29,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:51:29,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:51:29,248 INFO L87 Difference]: Start difference. First operand 16169 states and 23260 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-21 00:51:31,672 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:51:33,969 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:51:36,470 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:51:37,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:51:37,315 INFO L93 Difference]: Finished difference Result 16246 states and 23338 transitions. [2021-11-21 00:51:37,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:51:37,316 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) Word has length 130 [2021-11-21 00:51:37,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:51:37,398 INFO L225 Difference]: With dead ends: 16246 [2021-11-21 00:51:37,399 INFO L226 Difference]: Without dead ends: 16233 [2021-11-21 00:51:37,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:51:37,414 INFO L933 BasicCegarLoop]: 1680 mSDtfsCounter, 1332 mSDsluCounter, 1559 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 0 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1334 SdHoareTripleChecker+Valid, 3043 SdHoareTripleChecker+Invalid, 404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:51:37,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1334 Valid, 3043 Invalid, 404 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 401 Invalid, 3 Unknown, 0 Unchecked, 7.7s Time] [2021-11-21 00:51:37,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16233 states. [2021-11-21 00:51:38,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16233 to 16179. [2021-11-21 00:51:38,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16179 states, 10407 states have (on average 1.3599500336312098) internal successors, (14153), 10717 states have internal predecessors, (14153), 4484 states have call successors, (4484), 1295 states have call predecessors, (4484), 1287 states have return successors, (4616), 4313 states have call predecessors, (4616), 4478 states have call successors, (4616) [2021-11-21 00:51:38,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16179 states to 16179 states and 23253 transitions. [2021-11-21 00:51:38,511 INFO L78 Accepts]: Start accepts. Automaton has 16179 states and 23253 transitions. Word has length 130 [2021-11-21 00:51:38,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:51:38,512 INFO L470 AbstractCegarLoop]: Abstraction has 16179 states and 23253 transitions. [2021-11-21 00:51:38,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (19), 2 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-21 00:51:38,513 INFO L276 IsEmpty]: Start isEmpty. Operand 16179 states and 23253 transitions. [2021-11-21 00:51:38,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-21 00:51:38,521 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:51:38,521 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 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] [2021-11-21 00:51:38,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-21 00:51:38,523 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:51:38,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:51:38,523 INFO L85 PathProgramCache]: Analyzing trace with hash -203590507, now seen corresponding path program 1 times [2021-11-21 00:51:38,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:51:38,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483580869] [2021-11-21 00:51:38,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:51:38,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:51:38,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:51:38,838 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2021-11-21 00:51:38,838 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:51:38,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483580869] [2021-11-21 00:51:38,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483580869] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:51:38,839 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:51:38,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:51:38,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746846989] [2021-11-21 00:51:38,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:51:38,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:51:38,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:51:38,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:51:38,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:51:38,842 INFO L87 Difference]: Start difference. First operand 16179 states and 23253 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-21 00:51:41,466 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:51:44,880 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:51:45,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:51:45,502 INFO L93 Difference]: Finished difference Result 47416 states and 68029 transitions. [2021-11-21 00:51:45,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:51:45,503 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) Word has length 140 [2021-11-21 00:51:45,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:51:45,864 INFO L225 Difference]: With dead ends: 47416 [2021-11-21 00:51:45,864 INFO L226 Difference]: Without dead ends: 31277 [2021-11-21 00:51:45,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:51:45,946 INFO L933 BasicCegarLoop]: 1818 mSDtfsCounter, 1287 mSDsluCounter, 1549 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1287 SdHoareTripleChecker+Valid, 3171 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:51:45,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1287 Valid, 3171 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 456 Invalid, 2 Unknown, 0 Unchecked, 5.7s Time] [2021-11-21 00:51:45,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31277 states. [2021-11-21 00:51:47,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31277 to 31223. [2021-11-21 00:51:47,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31223 states, 20097 states have (on average 1.3605513260685675) internal successors, (27343), 20703 states have internal predecessors, (27343), 8574 states have call successors, (8574), 2565 states have call predecessors, (8574), 2551 states have return successors, (8838), 8245 states have call predecessors, (8838), 8568 states have call successors, (8838) [2021-11-21 00:51:47,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31223 states to 31223 states and 44755 transitions. [2021-11-21 00:51:47,751 INFO L78 Accepts]: Start accepts. Automaton has 31223 states and 44755 transitions. Word has length 140 [2021-11-21 00:51:47,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:51:47,752 INFO L470 AbstractCegarLoop]: Abstraction has 31223 states and 44755 transitions. [2021-11-21 00:51:47,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 2 states have call predecessors, (22), 2 states have call successors, (22) [2021-11-21 00:51:47,752 INFO L276 IsEmpty]: Start isEmpty. Operand 31223 states and 44755 transitions. [2021-11-21 00:51:47,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-21 00:51:47,788 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:51:47,788 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:51:47,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-21 00:51:47,789 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:51:47,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:51:47,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1418385877, now seen corresponding path program 1 times [2021-11-21 00:51:47,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:51:47,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205558380] [2021-11-21 00:51:47,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:51:47,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:51:47,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:51:48,342 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2021-11-21 00:51:48,342 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:51:48,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205558380] [2021-11-21 00:51:48,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205558380] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:51:48,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:51:48,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:51:48,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796295468] [2021-11-21 00:51:48,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:51:48,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:51:48,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:51:48,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:51:48,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:51:48,346 INFO L87 Difference]: Start difference. First operand 31223 states and 44755 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-21 00:51:51,135 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:51:54,038 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:51:54,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:51:54,597 INFO L93 Difference]: Finished difference Result 54033 states and 77397 transitions. [2021-11-21 00:51:54,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:51:54,598 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 172 [2021-11-21 00:51:54,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:51:54,703 INFO L225 Difference]: With dead ends: 54033 [2021-11-21 00:51:54,704 INFO L226 Difference]: Without dead ends: 22845 [2021-11-21 00:51:54,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:51:54,822 INFO L933 BasicCegarLoop]: 1417 mSDtfsCounter, 17 mSDsluCounter, 1601 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 2820 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:51:54,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 2820 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 402 Invalid, 2 Unknown, 0 Unchecked, 5.5s Time] [2021-11-21 00:51:54,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22845 states. [2021-11-21 00:51:56,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22845 to 22705. [2021-11-21 00:51:56,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22705 states, 14584 states have (on average 1.3593664289632474) internal successors, (19825), 15027 states have internal predecessors, (19825), 6245 states have call successors, (6245), 1886 states have call predecessors, (6245), 1875 states have return successors, (6441), 6002 states have call predecessors, (6441), 6239 states have call successors, (6441) [2021-11-21 00:51:56,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22705 states to 22705 states and 32511 transitions. [2021-11-21 00:51:56,173 INFO L78 Accepts]: Start accepts. Automaton has 22705 states and 32511 transitions. Word has length 172 [2021-11-21 00:51:56,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:51:56,174 INFO L470 AbstractCegarLoop]: Abstraction has 22705 states and 32511 transitions. [2021-11-21 00:51:56,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 2 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-21 00:51:56,174 INFO L276 IsEmpty]: Start isEmpty. Operand 22705 states and 32511 transitions. [2021-11-21 00:51:56,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-21 00:51:56,207 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:51:56,208 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:51:56,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-21 00:51:56,208 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:51:56,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:51:56,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1488019229, now seen corresponding path program 1 times [2021-11-21 00:51:56,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:51:56,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292429278] [2021-11-21 00:51:56,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:51:56,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:51:56,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:51:56,430 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 368 trivial. 0 not checked. [2021-11-21 00:51:56,430 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:51:56,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292429278] [2021-11-21 00:51:56,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292429278] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:51:56,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:51:56,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:51:56,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318850910] [2021-11-21 00:51:56,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:51:56,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:51:56,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:51:56,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:51:56,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:51:56,435 INFO L87 Difference]: Start difference. First operand 22705 states and 32511 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-21 00:51:58,687 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:52:03,225 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:52:03,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:52:03,924 INFO L93 Difference]: Finished difference Result 59552 states and 84758 transitions. [2021-11-21 00:52:03,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:52:03,925 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) Word has length 188 [2021-11-21 00:52:03,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:52:04,050 INFO L225 Difference]: With dead ends: 59552 [2021-11-21 00:52:04,050 INFO L226 Difference]: Without dead ends: 36887 [2021-11-21 00:52:04,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:52:04,120 INFO L933 BasicCegarLoop]: 1697 mSDtfsCounter, 993 mSDsluCounter, 1477 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 993 SdHoareTripleChecker+Valid, 2980 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-11-21 00:52:04,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [993 Valid, 2980 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 504 Invalid, 2 Unknown, 0 Unchecked, 6.2s Time] [2021-11-21 00:52:04,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36887 states. [2021-11-21 00:52:05,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36887 to 36756. [2021-11-21 00:52:05,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36756 states, 23484 states have (on average 1.3507068642479987) internal successors, (31720), 24303 states have internal predecessors, (31720), 10033 states have call successors, (10033), 3257 states have call predecessors, (10033), 3238 states have return successors, (10382), 9572 states have call predecessors, (10382), 10027 states have call successors, (10382) [2021-11-21 00:52:06,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36756 states to 36756 states and 52135 transitions. [2021-11-21 00:52:06,064 INFO L78 Accepts]: Start accepts. Automaton has 36756 states and 52135 transitions. Word has length 188 [2021-11-21 00:52:06,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:52:06,064 INFO L470 AbstractCegarLoop]: Abstraction has 36756 states and 52135 transitions. [2021-11-21 00:52:06,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (26), 2 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-21 00:52:06,065 INFO L276 IsEmpty]: Start isEmpty. Operand 36756 states and 52135 transitions. [2021-11-21 00:52:06,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-21 00:52:06,110 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:52:06,111 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:52:06,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-21 00:52:06,111 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:52:06,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:52:06,112 INFO L85 PathProgramCache]: Analyzing trace with hash 598511714, now seen corresponding path program 1 times [2021-11-21 00:52:06,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:52:06,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618586305] [2021-11-21 00:52:06,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:52:06,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:52:06,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:52:06,395 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2021-11-21 00:52:06,396 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:52:06,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618586305] [2021-11-21 00:52:06,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618586305] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:52:06,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:52:06,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:52:06,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759018130] [2021-11-21 00:52:06,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:52:06,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:52:06,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:52:06,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:52:06,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:52:06,400 INFO L87 Difference]: Start difference. First operand 36756 states and 52135 transitions. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-21 00:52:08,853 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:52:12,958 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:52:13,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:52:13,737 INFO L93 Difference]: Finished difference Result 60711 states and 86044 transitions. [2021-11-21 00:52:13,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:52:13,738 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) Word has length 185 [2021-11-21 00:52:13,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:52:13,836 INFO L225 Difference]: With dead ends: 60711 [2021-11-21 00:52:13,837 INFO L226 Difference]: Without dead ends: 25105 [2021-11-21 00:52:13,933 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 [2021-11-21 00:52:13,934 INFO L933 BasicCegarLoop]: 1421 mSDtfsCounter, 26 mSDsluCounter, 3208 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 5 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 4232 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2021-11-21 00:52:13,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 4232 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 610 Invalid, 2 Unknown, 0 Unchecked, 6.4s Time] [2021-11-21 00:52:13,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25105 states. [2021-11-21 00:52:15,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25105 to 24982. [2021-11-21 00:52:15,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24982 states, 15962 states have (on average 1.3498934970555068) internal successors, (21547), 16515 states have internal predecessors, (21547), 6826 states have call successors, (6826), 2204 states have call predecessors, (6826), 2193 states have return successors, (7007), 6519 states have call predecessors, (7007), 6820 states have call successors, (7007) [2021-11-21 00:52:15,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24982 states to 24982 states and 35380 transitions. [2021-11-21 00:52:15,390 INFO L78 Accepts]: Start accepts. Automaton has 24982 states and 35380 transitions. Word has length 185 [2021-11-21 00:52:15,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:52:15,391 INFO L470 AbstractCegarLoop]: Abstraction has 24982 states and 35380 transitions. [2021-11-21 00:52:15,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 2 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 2 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-21 00:52:15,391 INFO L276 IsEmpty]: Start isEmpty. Operand 24982 states and 35380 transitions. [2021-11-21 00:52:15,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-21 00:52:15,410 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:52:15,411 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:52:15,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-21 00:52:15,411 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:52:15,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:52:15,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1659517377, now seen corresponding path program 1 times [2021-11-21 00:52:15,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:52:15,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005345612] [2021-11-21 00:52:15,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:52:15,413 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:52:15,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:52:15,666 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 372 trivial. 0 not checked. [2021-11-21 00:52:15,666 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:52:15,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005345612] [2021-11-21 00:52:15,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005345612] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:52:15,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:52:15,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:52:15,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687594244] [2021-11-21 00:52:15,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:52:15,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:52:15,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:52:15,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:52:15,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:52:15,671 INFO L87 Difference]: Start difference. First operand 24982 states and 35380 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-21 00:52:17,891 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:52:21,934 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:52:22,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:52:22,549 INFO L93 Difference]: Finished difference Result 62865 states and 88606 transitions. [2021-11-21 00:52:22,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:52:22,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) Word has length 195 [2021-11-21 00:52:22,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:52:22,856 INFO L225 Difference]: With dead ends: 62865 [2021-11-21 00:52:22,856 INFO L226 Difference]: Without dead ends: 37934 [2021-11-21 00:52:22,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:52:22,933 INFO L933 BasicCegarLoop]: 2152 mSDtfsCounter, 1058 mSDsluCounter, 1533 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 3 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1058 SdHoareTripleChecker+Valid, 3494 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-11-21 00:52:22,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1058 Valid, 3494 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 519 Invalid, 2 Unknown, 0 Unchecked, 5.9s Time] [2021-11-21 00:52:22,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37934 states. [2021-11-21 00:52:24,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37934 to 37726. [2021-11-21 00:52:24,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37726 states, 24109 states have (on average 1.3435231656227964) internal successors, (32391), 24910 states have internal predecessors, (32391), 10191 states have call successors, (10191), 3441 states have call predecessors, (10191), 3425 states have return successors, (10425), 9715 states have call predecessors, (10425), 10185 states have call successors, (10425) [2021-11-21 00:52:24,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37726 states to 37726 states and 53007 transitions. [2021-11-21 00:52:24,522 INFO L78 Accepts]: Start accepts. Automaton has 37726 states and 53007 transitions. Word has length 195 [2021-11-21 00:52:24,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:52:24,523 INFO L470 AbstractCegarLoop]: Abstraction has 37726 states and 53007 transitions. [2021-11-21 00:52:24,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 2 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (30), 2 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-21 00:52:24,523 INFO L276 IsEmpty]: Start isEmpty. Operand 37726 states and 53007 transitions. [2021-11-21 00:52:24,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-21 00:52:24,548 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:52:24,549 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:52:24,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-21 00:52:24,549 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:52:24,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:52:24,550 INFO L85 PathProgramCache]: Analyzing trace with hash 1276952250, now seen corresponding path program 1 times [2021-11-21 00:52:24,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:52:24,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985747358] [2021-11-21 00:52:24,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:52:24,551 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:52:24,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:52:25,331 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 548 trivial. 0 not checked. [2021-11-21 00:52:25,331 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:52:25,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985747358] [2021-11-21 00:52:25,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985747358] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:52:25,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:52:25,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-21 00:52:25,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391858133] [2021-11-21 00:52:25,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:52:25,333 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-21 00:52:25,333 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:52:25,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-21 00:52:25,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-21 00:52:25,334 INFO L87 Difference]: Start difference. First operand 37726 states and 53007 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) [2021-11-21 00:52:27,874 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:52:32,882 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:52:33,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:52:33,714 INFO L93 Difference]: Finished difference Result 75539 states and 106201 transitions. [2021-11-21 00:52:33,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 00:52:33,714 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) Word has length 190 [2021-11-21 00:52:33,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:52:34,004 INFO L225 Difference]: With dead ends: 75539 [2021-11-21 00:52:34,004 INFO L226 Difference]: Without dead ends: 37902 [2021-11-21 00:52:34,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-21 00:52:34,074 INFO L933 BasicCegarLoop]: 1438 mSDtfsCounter, 186 mSDsluCounter, 6447 mSDsCounter, 0 mSdLazyCounter, 1003 mSolverCounterSat, 9 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 7101 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1003 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:52:34,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 7101 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1003 Invalid, 2 Unknown, 0 Unchecked, 7.1s Time] [2021-11-21 00:52:34,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37902 states. [2021-11-21 00:52:35,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37902 to 37744. [2021-11-21 00:52:35,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37744 states, 24121 states have (on average 1.343310808009618) internal successors, (32402), 24922 states have internal predecessors, (32402), 10194 states have call successors, (10194), 3441 states have call predecessors, (10194), 3428 states have return successors, (10431), 9721 states have call predecessors, (10431), 10188 states have call successors, (10431) [2021-11-21 00:52:35,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37744 states to 37744 states and 53027 transitions. [2021-11-21 00:52:35,986 INFO L78 Accepts]: Start accepts. Automaton has 37744 states and 53027 transitions. Word has length 190 [2021-11-21 00:52:35,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:52:35,987 INFO L470 AbstractCegarLoop]: Abstraction has 37744 states and 53027 transitions. [2021-11-21 00:52:35,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 3 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (29), 4 states have call predecessors, (29), 3 states have call successors, (29) [2021-11-21 00:52:35,987 INFO L276 IsEmpty]: Start isEmpty. Operand 37744 states and 53027 transitions. [2021-11-21 00:52:36,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-11-21 00:52:36,011 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:52:36,012 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:52:36,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-21 00:52:36,012 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:52:36,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:52:36,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1721678140, now seen corresponding path program 1 times [2021-11-21 00:52:36,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:52:36,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014486179] [2021-11-21 00:52:36,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:52:36,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:52:36,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:52:36,323 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 562 trivial. 0 not checked. [2021-11-21 00:52:36,323 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:52:36,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014486179] [2021-11-21 00:52:36,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014486179] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:52:36,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:52:36,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-21 00:52:36,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072491483] [2021-11-21 00:52:36,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:52:36,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-21 00:52:36,325 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:52:36,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-21 00:52:36,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:52:36,326 INFO L87 Difference]: Start difference. First operand 37744 states and 53027 transitions. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-21 00:52:38,871 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:52:43,133 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.97s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:52:45,192 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:52:46,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:52:46,168 INFO L93 Difference]: Finished difference Result 93227 states and 131000 transitions. [2021-11-21 00:52:46,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-21 00:52:46,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) Word has length 209 [2021-11-21 00:52:46,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:52:46,373 INFO L225 Difference]: With dead ends: 93227 [2021-11-21 00:52:46,373 INFO L226 Difference]: Without dead ends: 55583 [2021-11-21 00:52:46,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-21 00:52:46,458 INFO L933 BasicCegarLoop]: 1843 mSDtfsCounter, 1520 mSDsluCounter, 1526 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 6 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1520 SdHoareTripleChecker+Valid, 3178 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:52:46,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1520 Valid, 3178 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 431 Invalid, 2 Unknown, 0 Unchecked, 8.1s Time] [2021-11-21 00:52:46,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55583 states. [2021-11-21 00:52:48,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55583 to 55413. [2021-11-21 00:52:48,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55413 states, 35540 states have (on average 1.344456949915588) internal successors, (47782), 36701 states have internal predecessors, (47782), 14828 states have call successors, (14828), 5064 states have call predecessors, (14828), 5044 states have return successors, (15181), 14151 states have call predecessors, (15181), 14822 states have call successors, (15181) [2021-11-21 00:52:48,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55413 states to 55413 states and 77791 transitions. [2021-11-21 00:52:48,930 INFO L78 Accepts]: Start accepts. Automaton has 55413 states and 77791 transitions. Word has length 209 [2021-11-21 00:52:48,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:52:48,931 INFO L470 AbstractCegarLoop]: Abstraction has 55413 states and 77791 transitions. [2021-11-21 00:52:48,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 3 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (33), 3 states have call predecessors, (33), 3 states have call successors, (33) [2021-11-21 00:52:48,931 INFO L276 IsEmpty]: Start isEmpty. Operand 55413 states and 77791 transitions. [2021-11-21 00:52:48,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-11-21 00:52:48,941 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:52:48,942 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:52:48,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-21 00:52:48,942 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:52:48,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:52:48,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1754051292, now seen corresponding path program 1 times [2021-11-21 00:52:48,943 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:52:48,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492287487] [2021-11-21 00:52:48,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:52:48,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:52:49,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:52:49,515 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 563 trivial. 0 not checked. [2021-11-21 00:52:49,515 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:52:49,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492287487] [2021-11-21 00:52:49,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492287487] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:52:49,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:52:49,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-21 00:52:49,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028570548] [2021-11-21 00:52:49,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:52:49,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-21 00:52:49,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:52:49,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-21 00:52:49,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:52:49,518 INFO L87 Difference]: Start difference. First operand 55413 states and 77791 transitions. Second operand has 10 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 6 states have call successors, (34), 5 states have call predecessors, (34), 3 states have return successors, (32), 6 states have call predecessors, (32), 5 states have call successors, (32) [2021-11-21 00:52:50,583 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:52:53,648 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:52:57,680 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:53:10,154 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:53:14,553 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:53:16,639 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:53:19,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:53:19,461 INFO L93 Difference]: Finished difference Result 79818 states and 116549 transitions. [2021-11-21 00:53:19,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-21 00:53:19,462 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 6 states have call successors, (34), 5 states have call predecessors, (34), 3 states have return successors, (32), 6 states have call predecessors, (32), 5 states have call successors, (32) Word has length 205 [2021-11-21 00:53:19,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:53:19,861 INFO L225 Difference]: With dead ends: 79818 [2021-11-21 00:53:19,861 INFO L226 Difference]: Without dead ends: 79815 [2021-11-21 00:53:19,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-11-21 00:53:19,884 INFO L933 BasicCegarLoop]: 1958 mSDtfsCounter, 4759 mSDsluCounter, 5842 mSDsCounter, 0 mSdLazyCounter, 8774 mSolverCounterSat, 3630 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5066 SdHoareTripleChecker+Valid, 7030 SdHoareTripleChecker+Invalid, 12409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3630 IncrementalHoareTripleChecker+Valid, 8774 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:53:19,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5066 Valid, 7030 Invalid, 12409 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3630 Valid, 8774 Invalid, 5 Unknown, 0 Unchecked, 27.5s Time] [2021-11-21 00:53:19,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79815 states. [2021-11-21 00:53:22,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79815 to 59581. [2021-11-21 00:53:22,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59581 states, 38004 states have (on average 1.3354383749079044) internal successors, (50752), 39341 states have internal predecessors, (50752), 15844 states have call successors, (15844), 5456 states have call predecessors, (15844), 5732 states have return successors, (16819), 15341 states have call predecessors, (16819), 15838 states have call successors, (16819) [2021-11-21 00:53:22,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59581 states to 59581 states and 83415 transitions. [2021-11-21 00:53:22,916 INFO L78 Accepts]: Start accepts. Automaton has 59581 states and 83415 transitions. Word has length 205 [2021-11-21 00:53:22,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:53:22,916 INFO L470 AbstractCegarLoop]: Abstraction has 59581 states and 83415 transitions. [2021-11-21 00:53:22,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 6 states have call successors, (34), 5 states have call predecessors, (34), 3 states have return successors, (32), 6 states have call predecessors, (32), 5 states have call successors, (32) [2021-11-21 00:53:22,917 INFO L276 IsEmpty]: Start isEmpty. Operand 59581 states and 83415 transitions. [2021-11-21 00:53:22,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-21 00:53:22,936 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:53:22,936 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:53:22,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-21 00:53:22,937 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:53:22,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:53:22,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1068941740, now seen corresponding path program 1 times [2021-11-21 00:53:22,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:53:22,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42292971] [2021-11-21 00:53:22,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:53:22,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:53:23,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:53:23,572 INFO L134 CoverageAnalysis]: Checked inductivity of 575 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 575 trivial. 0 not checked. [2021-11-21 00:53:23,572 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:53:23,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42292971] [2021-11-21 00:53:23,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42292971] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:53:23,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:53:23,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:53:23,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616022457] [2021-11-21 00:53:23,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:53:23,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:53:23,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:53:23,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:53:23,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:53:23,574 INFO L87 Difference]: Start difference. First operand 59581 states and 83415 transitions. Second operand has 4 states, 3 states have (on average 27.0) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-21 00:53:26,441 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:53:31,058 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:53:32,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:53:32,229 INFO L93 Difference]: Finished difference Result 119210 states and 166911 transitions. [2021-11-21 00:53:32,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-21 00:53:32,230 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 27.0) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) Word has length 212 [2021-11-21 00:53:32,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:53:32,675 INFO L225 Difference]: With dead ends: 119210 [2021-11-21 00:53:32,675 INFO L226 Difference]: Without dead ends: 59678 [2021-11-21 00:53:32,786 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 [2021-11-21 00:53:32,787 INFO L933 BasicCegarLoop]: 1407 mSDtfsCounter, 4 mSDsluCounter, 3205 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 4216 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2021-11-21 00:53:32,788 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 4216 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 608 Invalid, 2 Unknown, 0 Unchecked, 6.5s Time] [2021-11-21 00:53:32,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59678 states. [2021-11-21 00:53:35,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59678 to 59582. [2021-11-21 00:53:35,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59582 states, 38005 states have (on average 1.3354295487435863) internal successors, (50753), 39342 states have internal predecessors, (50753), 15844 states have call successors, (15844), 5456 states have call predecessors, (15844), 5732 states have return successors, (16819), 15341 states have call predecessors, (16819), 15838 states have call successors, (16819) [2021-11-21 00:53:35,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59582 states to 59582 states and 83416 transitions. [2021-11-21 00:53:35,540 INFO L78 Accepts]: Start accepts. Automaton has 59582 states and 83416 transitions. Word has length 212 [2021-11-21 00:53:35,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:53:35,544 INFO L470 AbstractCegarLoop]: Abstraction has 59582 states and 83416 transitions. [2021-11-21 00:53:35,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 27.0) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 2 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-21 00:53:35,545 INFO L276 IsEmpty]: Start isEmpty. Operand 59582 states and 83416 transitions. [2021-11-21 00:53:35,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2021-11-21 00:53:35,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:53:35,569 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:53:35,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-21 00:53:35,570 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:53:35,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:53:35,571 INFO L85 PathProgramCache]: Analyzing trace with hash -345584215, now seen corresponding path program 1 times [2021-11-21 00:53:35,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:53:35,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121233525] [2021-11-21 00:53:35,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:53:35,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:53:35,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:53:36,259 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 575 trivial. 0 not checked. [2021-11-21 00:53:36,260 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:53:36,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121233525] [2021-11-21 00:53:36,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121233525] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:53:36,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243539280] [2021-11-21 00:53:36,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:53:36,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:53:36,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7134cf-6808-4378-9443-1562a6222f56/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:53:36,262 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7134cf-6808-4378-9443-1562a6222f56/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:53:36,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7134cf-6808-4378-9443-1562a6222f56/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:53:37,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:53:37,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 5516 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-21 00:53:37,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:53:38,032 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 186 proven. 0 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2021-11-21 00:53:38,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:53:38,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243539280] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:53:38,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:53:38,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 8 [2021-11-21 00:53:38,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72941960] [2021-11-21 00:53:38,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:53:38,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-21 00:53:38,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:53:38,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-21 00:53:38,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-21 00:53:38,034 INFO L87 Difference]: Start difference. First operand 59582 states and 83416 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) [2021-11-21 00:53:40,545 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:53:45,575 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:53:47,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:53:47,002 INFO L93 Difference]: Finished difference Result 119133 states and 166777 transitions. [2021-11-21 00:53:47,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-21 00:53:47,003 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) Word has length 213 [2021-11-21 00:53:47,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:53:47,260 INFO L225 Difference]: With dead ends: 119133 [2021-11-21 00:53:47,260 INFO L226 Difference]: Without dead ends: 59640 [2021-11-21 00:53:47,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-21 00:53:47,391 INFO L933 BasicCegarLoop]: 1434 mSDtfsCounter, 59 mSDsluCounter, 4834 mSDsCounter, 0 mSdLazyCounter, 817 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 5674 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 817 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2021-11-21 00:53:47,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 5674 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 817 Invalid, 2 Unknown, 0 Unchecked, 6.9s Time] [2021-11-21 00:53:47,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59640 states. [2021-11-21 00:53:49,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59640 to 59572. [2021-11-21 00:53:49,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59572 states, 38000 states have (on average 1.3354210526315788) internal successors, (50746), 39337 states have internal predecessors, (50746), 15841 states have call successors, (15841), 5454 states have call predecessors, (15841), 5730 states have return successors, (16816), 15338 states have call predecessors, (16816), 15835 states have call successors, (16816) [2021-11-21 00:53:50,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59572 states to 59572 states and 83403 transitions. [2021-11-21 00:53:50,207 INFO L78 Accepts]: Start accepts. Automaton has 59572 states and 83403 transitions. Word has length 213 [2021-11-21 00:53:50,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:53:50,208 INFO L470 AbstractCegarLoop]: Abstraction has 59572 states and 83403 transitions. [2021-11-21 00:53:50,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 3 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (32), 3 states have call predecessors, (32), 3 states have call successors, (32) [2021-11-21 00:53:50,208 INFO L276 IsEmpty]: Start isEmpty. Operand 59572 states and 83403 transitions. [2021-11-21 00:53:50,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-21 00:53:50,225 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:53:50,225 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-21 00:53:50,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7134cf-6808-4378-9443-1562a6222f56/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-21 00:53:50,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7134cf-6808-4378-9443-1562a6222f56/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-21 00:53:50,440 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:53:50,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:53:50,441 INFO L85 PathProgramCache]: Analyzing trace with hash 918869884, now seen corresponding path program 1 times [2021-11-21 00:53:50,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:53:50,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884957080] [2021-11-21 00:53:50,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:53:50,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:53:50,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:53:50,808 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 641 trivial. 0 not checked. [2021-11-21 00:53:50,808 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:53:50,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884957080] [2021-11-21 00:53:50,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884957080] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:53:50,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963483474] [2021-11-21 00:53:50,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:53:50,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:53:50,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7134cf-6808-4378-9443-1562a6222f56/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:53:50,816 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7134cf-6808-4378-9443-1562a6222f56/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:53:50,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_df7134cf-6808-4378-9443-1562a6222f56/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:53:52,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:53:52,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 5606 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-21 00:53:52,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:53:53,550 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 642 trivial. 0 not checked. [2021-11-21 00:53:53,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:53:53,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963483474] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:53:53,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:53:53,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [5] total 10 [2021-11-21 00:53:53,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200496572] [2021-11-21 00:53:53,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:53:53,552 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-21 00:53:53,552 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:53:53,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-21 00:53:53,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-21 00:53:53,553 INFO L87 Difference]: Start difference. First operand 59572 states and 83403 transitions. Second operand has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (32), 3 states have call predecessors, (32), 2 states have call successors, (32) [2021-11-21 00:53:57,064 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:54:11,092 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:54:13,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:54:13,579 INFO L93 Difference]: Finished difference Result 83545 states and 119851 transitions. [2021-11-21 00:54:13,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-21 00:54:13,580 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 13.833333333333334) internal successors, (83), 6 states have internal predecessors, (83), 3 states have call successors, (33), 4 states have call predecessors, (33), 3 states have return successors, (32), 3 states have call predecessors, (32), 2 states have call successors, (32) Word has length 216 [2021-11-21 00:54:13,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:54:13,914 INFO L225 Difference]: With dead ends: 83545 [2021-11-21 00:54:13,914 INFO L226 Difference]: Without dead ends: 83494 [2021-11-21 00:54:13,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-21 00:54:13,958 INFO L933 BasicCegarLoop]: 1774 mSDtfsCounter, 1897 mSDsluCounter, 5006 mSDsCounter, 0 mSdLazyCounter, 6680 mSolverCounterSat, 1187 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2112 SdHoareTripleChecker+Valid, 6124 SdHoareTripleChecker+Invalid, 7869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1187 IncrementalHoareTripleChecker+Valid, 6680 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:54:13,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2112 Valid, 6124 Invalid, 7869 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1187 Valid, 6680 Invalid, 2 Unknown, 0 Unchecked, 17.0s Time] [2021-11-21 00:54:14,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83494 states.