./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--xen-netfront.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_902cab76-b81e-4978-b784-804947e69125/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902cab76-b81e-4978-b784-804947e69125/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_902cab76-b81e-4978-b784-804947e69125/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902cab76-b81e-4978-b784-804947e69125/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--xen-netfront.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902cab76-b81e-4978-b784-804947e69125/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_902cab76-b81e-4978-b784-804947e69125/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 283b2978ab7cc2aad6d9ef5bd7f2056001c273cafa889d9023ed11b9be13f4c5 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:59:08,015 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:59:08,017 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:59:08,085 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:59:08,085 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:59:08,091 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:59:08,094 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:59:08,099 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:59:08,103 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:59:08,112 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:59:08,113 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:59:08,116 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:59:08,116 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:59:08,120 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:59:08,124 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:59:08,131 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:59:08,134 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:59:08,138 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:59:08,141 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:59:08,146 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:59:08,154 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:59:08,156 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:59:08,160 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:59:08,162 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:59:08,171 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:59:08,172 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:59:08,172 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:59:08,175 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:59:08,176 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:59:08,178 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:59:08,179 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:59:08,180 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:59:08,181 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:59:08,182 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:59:08,183 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:59:08,183 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:59:08,184 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:59:08,184 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:59:08,185 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:59:08,186 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:59:08,187 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:59:08,188 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902cab76-b81e-4978-b784-804947e69125/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-20 23:59:08,222 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:59:08,222 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:59:08,222 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:59:08,223 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:59:08,223 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:59:08,224 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:59:08,224 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:59:08,224 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:59:08,224 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:59:08,225 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:59:08,225 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:59:08,225 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:59:08,225 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:59:08,226 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:59:08,226 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:59:08,226 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:59:08,226 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:59:08,227 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:59:08,227 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:59:08,228 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:59:08,228 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:59:08,228 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:59:08,228 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:59:08,229 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:59:08,229 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:59:08,229 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:59:08,229 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:59:08,230 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:59:08,230 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:59:08,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:59:08,230 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:59:08,231 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:59:08,231 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:59:08,231 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:59:08,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:59:08,232 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:59:08,232 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:59:08,232 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:59:08,232 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_902cab76-b81e-4978-b784-804947e69125/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902cab76-b81e-4978-b784-804947e69125/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 283b2978ab7cc2aad6d9ef5bd7f2056001c273cafa889d9023ed11b9be13f4c5 [2021-11-20 23:59:08,552 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:59:08,579 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:59:08,582 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:59:08,584 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:59:08,585 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:59:08,587 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902cab76-b81e-4978-b784-804947e69125/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--xen-netfront.ko-entry_point.cil.out.i [2021-11-20 23:59:08,660 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902cab76-b81e-4978-b784-804947e69125/bin/utaipan-TEXQjIfE4P/data/fa4dd12b2/317969ae0f2e4064bce1c592fab1ade1/FLAG99cd8d4f3 [2021-11-20 23:59:09,799 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:59:09,800 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902cab76-b81e-4978-b784-804947e69125/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--xen-netfront.ko-entry_point.cil.out.i [2021-11-20 23:59:09,859 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902cab76-b81e-4978-b784-804947e69125/bin/utaipan-TEXQjIfE4P/data/fa4dd12b2/317969ae0f2e4064bce1c592fab1ade1/FLAG99cd8d4f3 [2021-11-20 23:59:10,045 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902cab76-b81e-4978-b784-804947e69125/bin/utaipan-TEXQjIfE4P/data/fa4dd12b2/317969ae0f2e4064bce1c592fab1ade1 [2021-11-20 23:59:10,048 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:59:10,050 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:59:10,052 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:59:10,052 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:59:10,060 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:59:10,062 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:59:10" (1/1) ... [2021-11-20 23:59:10,063 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3aa0f056 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:59:10, skipping insertion in model container [2021-11-20 23:59:10,065 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:59:10" (1/1) ... [2021-11-20 23:59:10,075 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:59:10,289 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:59:13,765 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_902cab76-b81e-4978-b784-804947e69125/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--xen-netfront.ko-entry_point.cil.out.i[319471,319484] [2021-11-20 23:59:13,830 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:59:13,861 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:59:14,424 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_902cab76-b81e-4978-b784-804947e69125/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-43_2a-drivers--net--xen-netfront.ko-entry_point.cil.out.i[319471,319484] [2021-11-20 23:59:14,436 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:59:14,680 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:59:14,680 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:59:14 WrapperNode [2021-11-20 23:59:14,681 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:59:14,682 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:59:14,682 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:59:14,682 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:59:14,690 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:59:14" (1/1) ... [2021-11-20 23:59:14,805 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:59:14" (1/1) ... [2021-11-20 23:59:14,998 INFO L137 Inliner]: procedures = 336, calls = 1905, calls flagged for inlining = 163, calls inlined = 135, statements flattened = 4619 [2021-11-20 23:59:14,999 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:59:15,000 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:59:15,001 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:59:15,001 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:59:15,013 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:59:14" (1/1) ... [2021-11-20 23:59:15,013 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:59:14" (1/1) ... [2021-11-20 23:59:15,040 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:59:14" (1/1) ... [2021-11-20 23:59:15,040 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:59:14" (1/1) ... [2021-11-20 23:59:15,137 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:59:14" (1/1) ... [2021-11-20 23:59:15,171 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:59:14" (1/1) ... [2021-11-20 23:59:15,220 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:59:14" (1/1) ... [2021-11-20 23:59:15,254 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:59:15,255 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:59:15,255 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:59:15,255 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:59:15,256 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:59:14" (1/1) ... [2021-11-20 23:59:15,266 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:59:15,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902cab76-b81e-4978-b784-804947e69125/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:59:15,291 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902cab76-b81e-4978-b784-804947e69125/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:59:15,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902cab76-b81e-4978-b784-804947e69125/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:59:15,343 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-20 23:59:15,343 INFO L130 BoogieDeclarations]: Found specification of procedure get_page [2021-11-20 23:59:15,343 INFO L138 BoogieDeclarations]: Found implementation of procedure get_page [2021-11-20 23:59:15,343 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-20 23:59:15,344 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-20 23:59:15,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-20 23:59:15,344 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-20 23:59:15,344 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-20 23:59:15,344 INFO L130 BoogieDeclarations]: Found specification of procedure napi_schedule [2021-11-20 23:59:15,344 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_schedule [2021-11-20 23:59:15,345 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_change_mtu [2021-11-20 23:59:15,345 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_change_mtu [2021-11-20 23:59:15,345 INFO L130 BoogieDeclarations]: Found specification of procedure lowmem_page_address [2021-11-20 23:59:15,345 INFO L138 BoogieDeclarations]: Found implementation of procedure lowmem_page_address [2021-11-20 23:59:15,345 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_write [2021-11-20 23:59:15,346 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_write [2021-11-20 23:59:15,346 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_off [2021-11-20 23:59:15,346 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_off [2021-11-20 23:59:15,346 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_lock [2021-11-20 23:59:15,346 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_lock [2021-11-20 23:59:15,346 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-20 23:59:15,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-20 23:59:15,347 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_unlock [2021-11-20 23:59:15,347 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_unlock [2021-11-20 23:59:15,347 INFO L130 BoogieDeclarations]: Found specification of procedure u64_stats_fetch_retry_irq [2021-11-20 23:59:15,347 INFO L138 BoogieDeclarations]: Found implementation of procedure u64_stats_fetch_retry_irq [2021-11-20 23:59:15,348 INFO L130 BoogieDeclarations]: Found specification of procedure bind_evtchn_to_irqhandler [2021-11-20 23:59:15,348 INFO L138 BoogieDeclarations]: Found implementation of procedure bind_evtchn_to_irqhandler [2021-11-20 23:59:15,348 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_transaction_end [2021-11-20 23:59:15,348 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_transaction_end [2021-11-20 23:59:15,348 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_remove [2021-11-20 23:59:15,348 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_remove [2021-11-20 23:59:15,349 INFO L130 BoogieDeclarations]: Found specification of procedure __alloc_percpu [2021-11-20 23:59:15,349 INFO L138 BoogieDeclarations]: Found implementation of procedure __alloc_percpu [2021-11-20 23:59:15,349 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-20 23:59:15,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-20 23:59:15,349 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_make_txreqs [2021-11-20 23:59:15,349 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_make_txreqs [2021-11-20 23:59:15,350 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_destroy_queues [2021-11-20 23:59:15,350 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_destroy_queues [2021-11-20 23:59:15,350 INFO L130 BoogieDeclarations]: Found specification of procedure netif_carrier_ok [2021-11-20 23:59:15,350 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_carrier_ok [2021-11-20 23:59:15,350 INFO L130 BoogieDeclarations]: Found specification of procedure clear_bit [2021-11-20 23:59:15,351 INFO L138 BoogieDeclarations]: Found implementation of procedure clear_bit [2021-11-20 23:59:15,351 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_grant_ring [2021-11-20 23:59:15,351 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_grant_ring [2021-11-20 23:59:15,351 INFO L130 BoogieDeclarations]: Found specification of procedure free_percpu [2021-11-20 23:59:15,351 INFO L138 BoogieDeclarations]: Found implementation of procedure free_percpu [2021-11-20 23:59:15,352 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2021-11-20 23:59:15,352 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2021-11-20 23:59:15,352 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_claim_grant_reference [2021-11-20 23:59:15,352 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_claim_grant_reference [2021-11-20 23:59:15,352 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-20 23:59:15,353 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-20 23:59:15,353 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-20 23:59:15,353 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-20 23:59:15,353 INFO L130 BoogieDeclarations]: Found specification of procedure netif_set_real_num_tx_queues [2021-11-20 23:59:15,353 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_set_real_num_tx_queues [2021-11-20 23:59:15,353 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_end_foreign_access [2021-11-20 23:59:15,354 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_end_foreign_access [2021-11-20 23:59:15,354 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_disconnect_backend [2021-11-20 23:59:15,354 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_disconnect_backend [2021-11-20 23:59:15,354 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_get_stats64 [2021-11-20 23:59:15,354 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_get_stats64 [2021-11-20 23:59:15,355 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-20 23:59:15,418 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-20 23:59:15,419 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_alloc_evtchn [2021-11-20 23:59:15,419 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_alloc_evtchn [2021-11-20 23:59:15,419 INFO L130 BoogieDeclarations]: Found specification of procedure ERR_PTR [2021-11-20 23:59:15,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ERR_PTR [2021-11-20 23:59:15,419 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_alloc_grant_references [2021-11-20 23:59:15,419 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_alloc_grant_references [2021-11-20 23:59:15,419 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_timer_1 [2021-11-20 23:59:15,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_timer_1 [2021-11-20 23:59:15,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 23:59:15,420 INFO L130 BoogieDeclarations]: Found specification of procedure netfront_tx_slot_available [2021-11-20 23:59:15,420 INFO L138 BoogieDeclarations]: Found implementation of procedure netfront_tx_slot_available [2021-11-20 23:59:15,420 INFO L130 BoogieDeclarations]: Found specification of procedure notify_remote_via_irq [2021-11-20 23:59:15,420 INFO L138 BoogieDeclarations]: Found implementation of procedure notify_remote_via_irq [2021-11-20 23:59:15,420 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_release_grant_reference [2021-11-20 23:59:15,420 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_release_grant_reference [2021-11-20 23:59:15,421 INFO L130 BoogieDeclarations]: Found specification of procedure netif_running [2021-11-20 23:59:15,421 INFO L138 BoogieDeclarations]: Found implementation of procedure netif_running [2021-11-20 23:59:15,422 INFO L130 BoogieDeclarations]: Found specification of procedure eth_mac_addr [2021-11-20 23:59:15,422 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_mac_addr [2021-11-20 23:59:15,422 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_can_sg [2021-11-20 23:59:15,422 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_can_sg [2021-11-20 23:59:15,422 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 23:59:15,422 INFO L130 BoogieDeclarations]: Found specification of procedure skb_end_pointer [2021-11-20 23:59:15,423 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_end_pointer [2021-11-20 23:59:15,423 INFO L130 BoogieDeclarations]: Found specification of procedure eth_validate_addr [2021-11-20 23:59:15,423 INFO L138 BoogieDeclarations]: Found implementation of procedure eth_validate_addr [2021-11-20 23:59:15,423 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_spin_unlock [2021-11-20 23:59:15,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_spin_unlock [2021-11-20 23:59:15,423 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-20 23:59:15,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-20 23:59:15,424 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_rxidx [2021-11-20 23:59:15,424 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_rxidx [2021-11-20 23:59:15,424 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-20 23:59:15,424 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-20 23:59:15,424 INFO L130 BoogieDeclarations]: Found specification of procedure __pskb_pull_tail [2021-11-20 23:59:15,424 INFO L138 BoogieDeclarations]: Found implementation of procedure __pskb_pull_tail [2021-11-20 23:59:15,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:59:15,425 INFO L130 BoogieDeclarations]: Found specification of procedure dev_set_drvdata [2021-11-20 23:59:15,425 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_set_drvdata [2021-11-20 23:59:15,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 23:59:15,425 INFO L130 BoogieDeclarations]: Found specification of procedure write_queue_xenstore_keys [2021-11-20 23:59:15,425 INFO L138 BoogieDeclarations]: Found implementation of procedure write_queue_xenstore_keys [2021-11-20 23:59:15,425 INFO L130 BoogieDeclarations]: Found specification of procedure pfn_to_mfn [2021-11-20 23:59:15,425 INFO L138 BoogieDeclarations]: Found implementation of procedure pfn_to_mfn [2021-11-20 23:59:15,426 INFO L130 BoogieDeclarations]: Found specification of procedure kfree_skb [2021-11-20 23:59:15,426 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree_skb [2021-11-20 23:59:15,426 INFO L130 BoogieDeclarations]: Found specification of procedure add_id_to_freelist [2021-11-20 23:59:15,426 INFO L138 BoogieDeclarations]: Found implementation of procedure add_id_to_freelist [2021-11-20 23:59:15,426 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_alloc_rx_buffers [2021-11-20 23:59:15,426 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_alloc_rx_buffers [2021-11-20 23:59:15,426 INFO L130 BoogieDeclarations]: Found specification of procedure skb_entry_set_link [2021-11-20 23:59:15,427 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_entry_set_link [2021-11-20 23:59:15,427 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_priv [2021-11-20 23:59:15,427 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_priv [2021-11-20 23:59:15,427 INFO L130 BoogieDeclarations]: Found specification of procedure netdev_get_tx_queue [2021-11-20 23:59:15,427 INFO L138 BoogieDeclarations]: Found implementation of procedure netdev_get_tx_queue [2021-11-20 23:59:15,427 INFO L130 BoogieDeclarations]: Found specification of procedure store_rxbuf [2021-11-20 23:59:15,427 INFO L138 BoogieDeclarations]: Found implementation of procedure store_rxbuf [2021-11-20 23:59:15,428 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_bh [2021-11-20 23:59:15,428 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_bh [2021-11-20 23:59:15,428 INFO L130 BoogieDeclarations]: Found specification of procedure free_pages [2021-11-20 23:59:15,428 INFO L138 BoogieDeclarations]: Found implementation of procedure free_pages [2021-11-20 23:59:15,428 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_end_foreign_access_ref [2021-11-20 23:59:15,428 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_end_foreign_access_ref [2021-11-20 23:59:15,429 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-20 23:59:15,429 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_make_one_txreq [2021-11-20 23:59:15,429 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_make_one_txreq [2021-11-20 23:59:15,429 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_irq [2021-11-20 23:59:15,429 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_irq [2021-11-20 23:59:15,429 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_free_grant_references [2021-11-20 23:59:15,429 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_free_grant_references [2021-11-20 23:59:15,429 INFO L130 BoogieDeclarations]: Found specification of procedure simple_strtoul [2021-11-20 23:59:15,430 INFO L138 BoogieDeclarations]: Found implementation of procedure simple_strtoul [2021-11-20 23:59:15,430 INFO L130 BoogieDeclarations]: Found specification of procedure dev_get_drvdata [2021-11-20 23:59:15,430 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_get_drvdata [2021-11-20 23:59:15,430 INFO L130 BoogieDeclarations]: Found specification of procedure __raw_spin_lock_init [2021-11-20 23:59:15,430 INFO L138 BoogieDeclarations]: Found implementation of procedure __raw_spin_lock_init [2021-11-20 23:59:15,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-20 23:59:15,430 INFO L130 BoogieDeclarations]: Found specification of procedure unbind_from_irqhandler [2021-11-20 23:59:15,431 INFO L138 BoogieDeclarations]: Found implementation of procedure unbind_from_irqhandler [2021-11-20 23:59:15,431 INFO L130 BoogieDeclarations]: Found specification of procedure get_zeroed_page [2021-11-20 23:59:15,431 INFO L138 BoogieDeclarations]: Found implementation of procedure get_zeroed_page [2021-11-20 23:59:15,431 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_free_netdev [2021-11-20 23:59:15,431 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_free_netdev [2021-11-20 23:59:15,431 INFO L130 BoogieDeclarations]: Found specification of procedure netback_changed [2021-11-20 23:59:15,431 INFO L138 BoogieDeclarations]: Found implementation of procedure netback_changed [2021-11-20 23:59:15,431 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_poll_controller [2021-11-20 23:59:15,432 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_poll_controller [2021-11-20 23:59:15,432 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 23:59:15,432 INFO L130 BoogieDeclarations]: Found specification of procedure skb_frag_page [2021-11-20 23:59:15,432 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_frag_page [2021-11-20 23:59:15,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-20 23:59:15,432 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-20 23:59:15,432 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_select_queue [2021-11-20 23:59:15,433 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_select_queue [2021-11-20 23:59:15,433 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_end_access [2021-11-20 23:59:15,433 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_end_access [2021-11-20 23:59:15,433 INFO L130 BoogieDeclarations]: Found specification of procedure constant_test_bit [2021-11-20 23:59:15,433 INFO L138 BoogieDeclarations]: Found implementation of procedure constant_test_bit [2021-11-20 23:59:15,433 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_alloc_flags [2021-11-20 23:59:15,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_alloc_flags [2021-11-20 23:59:15,433 INFO L130 BoogieDeclarations]: Found specification of procedure activate_suitable_timer_1 [2021-11-20 23:59:15,434 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_suitable_timer_1 [2021-11-20 23:59:15,434 INFO L130 BoogieDeclarations]: Found specification of procedure u64_stats_init [2021-11-20 23:59:15,434 INFO L138 BoogieDeclarations]: Found implementation of procedure u64_stats_init [2021-11-20 23:59:15,436 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-20 23:59:15,437 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-20 23:59:15,437 INFO L130 BoogieDeclarations]: Found specification of procedure skb_add_rx_frag [2021-11-20 23:59:15,437 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_add_rx_frag [2021-11-20 23:59:15,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 23:59:15,437 INFO L130 BoogieDeclarations]: Found specification of procedure net_ratelimit [2021-11-20 23:59:15,438 INFO L138 BoogieDeclarations]: Found implementation of procedure net_ratelimit [2021-11-20 23:59:15,438 INFO L130 BoogieDeclarations]: Found specification of procedure napi_enable [2021-11-20 23:59:15,438 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_enable [2021-11-20 23:59:15,438 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-20 23:59:15,438 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-20 23:59:15,438 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-20 23:59:15,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-20 23:59:15,439 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_fix_features [2021-11-20 23:59:15,439 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_fix_features [2021-11-20 23:59:15,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:59:15,440 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_calloc [2021-11-20 23:59:15,440 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-20 23:59:15,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-20 23:59:15,440 INFO L130 BoogieDeclarations]: Found specification of procedure get_phys_to_machine [2021-11-20 23:59:15,440 INFO L138 BoogieDeclarations]: Found implementation of procedure get_phys_to_machine [2021-11-20 23:59:15,441 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:59:15,441 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2021-11-20 23:59:15,441 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2021-11-20 23:59:15,441 INFO L130 BoogieDeclarations]: Found specification of procedure cpumask_next [2021-11-20 23:59:15,441 INFO L138 BoogieDeclarations]: Found implementation of procedure cpumask_next [2021-11-20 23:59:15,442 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:59:15,442 INFO L130 BoogieDeclarations]: Found specification of procedure skb_headlen [2021-11-20 23:59:15,442 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_headlen [2021-11-20 23:59:15,442 INFO L130 BoogieDeclarations]: Found specification of procedure rtnl_lock [2021-11-20 23:59:15,442 INFO L138 BoogieDeclarations]: Found implementation of procedure rtnl_lock [2021-11-20 23:59:15,443 INFO L130 BoogieDeclarations]: Found specification of procedure show_rxbuf [2021-11-20 23:59:15,443 INFO L138 BoogieDeclarations]: Found implementation of procedure show_rxbuf [2021-11-20 23:59:15,443 INFO L130 BoogieDeclarations]: Found specification of procedure skb_is_gso [2021-11-20 23:59:15,443 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_is_gso [2021-11-20 23:59:15,443 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2021-11-20 23:59:15,443 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2021-11-20 23:59:15,444 INFO L130 BoogieDeclarations]: Found specification of procedure gnttab_grant_foreign_access_ref [2021-11-20 23:59:15,444 INFO L138 BoogieDeclarations]: Found implementation of procedure gnttab_grant_foreign_access_ref [2021-11-20 23:59:15,444 INFO L130 BoogieDeclarations]: Found specification of procedure napi_disable [2021-11-20 23:59:15,444 INFO L138 BoogieDeclarations]: Found implementation of procedure napi_disable [2021-11-20 23:59:15,444 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_set_features [2021-11-20 23:59:15,445 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_set_features [2021-11-20 23:59:15,445 INFO L130 BoogieDeclarations]: Found specification of procedure skb_frag_size [2021-11-20 23:59:15,445 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_frag_size [2021-11-20 23:59:15,445 INFO L130 BoogieDeclarations]: Found specification of procedure u64_stats_fetch_begin_irq [2021-11-20 23:59:15,445 INFO L138 BoogieDeclarations]: Found implementation of procedure u64_stats_fetch_begin_irq [2021-11-20 23:59:15,446 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:59:15,446 INFO L130 BoogieDeclarations]: Found specification of procedure xenbus_free_evtchn [2021-11-20 23:59:15,446 INFO L138 BoogieDeclarations]: Found implementation of procedure xenbus_free_evtchn [2021-11-20 23:59:15,446 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:59:15,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:59:15,447 INFO L130 BoogieDeclarations]: Found specification of procedure xennet_tx_buf_gc [2021-11-20 23:59:15,447 INFO L138 BoogieDeclarations]: Found implementation of procedure xennet_tx_buf_gc [2021-11-20 23:59:15,447 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_bh [2021-11-20 23:59:15,447 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_bh [2021-11-20 23:59:15,447 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-20 23:59:15,448 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-20 23:59:16,385 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:59:16,391 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:59:17,729 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-20 23:59:22,588 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:59:23,618 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:59:23,619 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-20 23:59:23,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:59:23 BoogieIcfgContainer [2021-11-20 23:59:23,626 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:59:23,628 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:59:23,629 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:59:23,634 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:59:23,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:59:10" (1/3) ... [2021-11-20 23:59:23,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39d12879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:59:23, skipping insertion in model container [2021-11-20 23:59:23,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:59:14" (2/3) ... [2021-11-20 23:59:23,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39d12879 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:59:23, skipping insertion in model container [2021-11-20 23:59:23,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:59:23" (3/3) ... [2021-11-20 23:59:23,642 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-43_2a-drivers--net--xen-netfront.ko-entry_point.cil.out.i [2021-11-20 23:59:23,650 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:59:23,651 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 23:59:23,738 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:59:23,763 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 23:59:23,772 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 23:59:23,847 INFO L276 IsEmpty]: Start isEmpty. Operand has 1215 states, 756 states have (on average 1.3505291005291005) internal successors, (1021), 791 states have internal predecessors, (1021), 352 states have call successors, (352), 106 states have call predecessors, (352), 105 states have return successors, (343), 340 states have call predecessors, (343), 343 states have call successors, (343) [2021-11-20 23:59:23,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2021-11-20 23:59:23,910 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:59:23,913 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:59:23,913 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:59:23,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:59:23,921 INFO L85 PathProgramCache]: Analyzing trace with hash -818746182, now seen corresponding path program 1 times [2021-11-20 23:59:23,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:59:23,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918845415] [2021-11-20 23:59:23,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:59:23,935 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:59:24,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:59:24,988 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1452 trivial. 0 not checked. [2021-11-20 23:59:24,989 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:59:24,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918845415] [2021-11-20 23:59:24,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918845415] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:59:24,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:59:24,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:59:24,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703920919] [2021-11-20 23:59:24,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:59:25,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:59:25,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:59:25,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:59:25,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:59:25,037 INFO L87 Difference]: Start difference. First operand has 1215 states, 756 states have (on average 1.3505291005291005) internal successors, (1021), 791 states have internal predecessors, (1021), 352 states have call successors, (352), 106 states have call predecessors, (352), 105 states have return successors, (343), 340 states have call predecessors, (343), 343 states have call successors, (343) 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, (38), 2 states have call predecessors, (38), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-20 23:59:27,101 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:59:29,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:59:29,190 INFO L93 Difference]: Finished difference Result 3039 states and 4290 transitions. [2021-11-20 23:59:29,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:59:29,193 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, (38), 2 states have call predecessors, (38), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) Word has length 333 [2021-11-20 23:59:29,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:59:29,235 INFO L225 Difference]: With dead ends: 3039 [2021-11-20 23:59:29,235 INFO L226 Difference]: Without dead ends: 1843 [2021-11-20 23:59:29,249 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 [2021-11-20 23:59:29,254 INFO L933 BasicCegarLoop]: 1665 mSDtfsCounter, 915 mSDsluCounter, 1687 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 915 SdHoareTripleChecker+Valid, 3138 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:59:29,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [915 Valid, 3138 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 461 Invalid, 1 Unknown, 0 Unchecked, 3.9s Time] [2021-11-20 23:59:29,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1843 states. [2021-11-20 23:59:29,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1843 to 1839. [2021-11-20 23:59:29,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1839 states, 1155 states have (on average 1.335930735930736) internal successors, (1543), 1189 states have internal predecessors, (1543), 511 states have call successors, (511), 173 states have call predecessors, (511), 172 states have return successors, (510), 503 states have call predecessors, (510), 510 states have call successors, (510) [2021-11-20 23:59:29,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1839 states to 1839 states and 2564 transitions. [2021-11-20 23:59:29,486 INFO L78 Accepts]: Start accepts. Automaton has 1839 states and 2564 transitions. Word has length 333 [2021-11-20 23:59:29,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:59:29,490 INFO L470 AbstractCegarLoop]: Abstraction has 1839 states and 2564 transitions. [2021-11-20 23:59:29,490 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, (38), 2 states have call predecessors, (38), 1 states have return successors, (35), 2 states have call predecessors, (35), 2 states have call successors, (35) [2021-11-20 23:59:29,490 INFO L276 IsEmpty]: Start isEmpty. Operand 1839 states and 2564 transitions. [2021-11-20 23:59:29,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2021-11-20 23:59:29,503 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:59:29,504 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 9, 9, 9, 9, 9, 9, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:59:29,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:59:29,504 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:59:29,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:59:29,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1732066142, now seen corresponding path program 1 times [2021-11-20 23:59:29,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:59:29,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815368546] [2021-11-20 23:59:29,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:59:29,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:59:29,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:59:30,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1464 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1464 trivial. 0 not checked. [2021-11-20 23:59:30,045 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:59:30,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815368546] [2021-11-20 23:59:30,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815368546] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:59:30,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:59:30,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:59:30,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012230395] [2021-11-20 23:59:30,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:59:30,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:59:30,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:59:30,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:59:30,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:59:30,050 INFO L87 Difference]: Start difference. First operand 1839 states and 2564 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-20 23:59:32,096 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:59:34,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:59:34,108 INFO L93 Difference]: Finished difference Result 4573 states and 6362 transitions. [2021-11-20 23:59:34,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:59:34,109 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) Word has length 346 [2021-11-20 23:59:34,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:59:34,138 INFO L225 Difference]: With dead ends: 4573 [2021-11-20 23:59:34,138 INFO L226 Difference]: Without dead ends: 2789 [2021-11-20 23:59:34,148 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 [2021-11-20 23:59:34,150 INFO L933 BasicCegarLoop]: 1798 mSDtfsCounter, 1141 mSDsluCounter, 1573 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 5 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1141 SdHoareTripleChecker+Valid, 3164 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:59:34,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1141 Valid, 3164 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 540 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2021-11-20 23:59:34,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2789 states. [2021-11-20 23:59:34,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2789 to 2777. [2021-11-20 23:59:34,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2777 states, 1769 states have (on average 1.3459581684567552) internal successors, (2381), 1833 states have internal predecessors, (2381), 742 states have call successors, (742), 268 states have call predecessors, (742), 265 states have return successors, (741), 721 states have call predecessors, (741), 741 states have call successors, (741) [2021-11-20 23:59:34,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2777 states to 2777 states and 3864 transitions. [2021-11-20 23:59:34,329 INFO L78 Accepts]: Start accepts. Automaton has 2777 states and 3864 transitions. Word has length 346 [2021-11-20 23:59:34,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:59:34,331 INFO L470 AbstractCegarLoop]: Abstraction has 2777 states and 3864 transitions. [2021-11-20 23:59:34,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (39), 2 states have call predecessors, (39), 2 states have call successors, (39) [2021-11-20 23:59:34,332 INFO L276 IsEmpty]: Start isEmpty. Operand 2777 states and 3864 transitions. [2021-11-20 23:59:34,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 418 [2021-11-20 23:59:34,344 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:59:34,344 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:59:34,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:59:34,345 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:59:34,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:59:34,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1004471355, now seen corresponding path program 1 times [2021-11-20 23:59:34,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:59:34,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124807203] [2021-11-20 23:59:34,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:59:34,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:59:34,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:59:34,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2567 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2567 trivial. 0 not checked. [2021-11-20 23:59:34,892 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:59:34,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124807203] [2021-11-20 23:59:34,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124807203] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:59:34,893 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:59:34,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:59:34,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362309662] [2021-11-20 23:59:34,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:59:34,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:59:34,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:59:34,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:59:34,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:59:34,896 INFO L87 Difference]: Start difference. First operand 2777 states and 3864 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (44), 3 states have call predecessors, (44), 1 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2021-11-20 23:59:36,939 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:59:38,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:59:38,804 INFO L93 Difference]: Finished difference Result 2968 states and 4038 transitions. [2021-11-20 23:59:38,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:59:38,805 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (44), 3 states have call predecessors, (44), 1 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) Word has length 417 [2021-11-20 23:59:38,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:59:38,830 INFO L225 Difference]: With dead ends: 2968 [2021-11-20 23:59:38,831 INFO L226 Difference]: Without dead ends: 2965 [2021-11-20 23:59:38,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:59:38,839 INFO L933 BasicCegarLoop]: 1490 mSDtfsCounter, 1208 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1208 SdHoareTripleChecker+Valid, 1847 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:59:38,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1208 Valid, 1847 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 303 Invalid, 1 Unknown, 0 Unchecked, 3.8s Time] [2021-11-20 23:59:38,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2965 states. [2021-11-20 23:59:39,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2965 to 2965. [2021-11-20 23:59:39,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2965 states, 1868 states have (on average 1.3313704496788008) internal successors, (2487), 1934 states have internal predecessors, (2487), 774 states have call successors, (774), 325 states have call predecessors, (774), 322 states have return successors, (773), 753 states have call predecessors, (773), 773 states have call successors, (773) [2021-11-20 23:59:39,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 4034 transitions. [2021-11-20 23:59:39,117 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 4034 transitions. Word has length 417 [2021-11-20 23:59:39,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:59:39,119 INFO L470 AbstractCegarLoop]: Abstraction has 2965 states and 4034 transitions. [2021-11-20 23:59:39,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 3 states have call successors, (44), 3 states have call predecessors, (44), 1 states have return successors, (41), 2 states have call predecessors, (41), 2 states have call successors, (41) [2021-11-20 23:59:39,119 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 4034 transitions. [2021-11-20 23:59:39,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2021-11-20 23:59:39,144 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:59:39,144 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 9, 9, 9, 9, 9, 9, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:59:39,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 23:59:39,145 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:59:39,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:59:39,146 INFO L85 PathProgramCache]: Analyzing trace with hash -725442373, now seen corresponding path program 1 times [2021-11-20 23:59:39,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:59:39,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865691264] [2021-11-20 23:59:39,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:59:39,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:59:39,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:59:39,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2801 trivial. 0 not checked. [2021-11-20 23:59:39,560 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:59:39,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865691264] [2021-11-20 23:59:39,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865691264] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:59:39,561 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:59:39,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-20 23:59:39,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777727447] [2021-11-20 23:59:39,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:59:39,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 23:59:39,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:59:39,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 23:59:39,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-20 23:59:39,565 INFO L87 Difference]: Start difference. First operand 2965 states and 4034 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (55), 2 states have call predecessors, (55), 1 states have return successors, (52), 3 states have call predecessors, (52), 3 states have call successors, (52) [2021-11-20 23:59:41,607 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:59:43,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:59:43,852 INFO L93 Difference]: Finished difference Result 7174 states and 9758 transitions. [2021-11-20 23:59:43,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 23:59:43,853 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (55), 2 states have call predecessors, (55), 1 states have return successors, (52), 3 states have call predecessors, (52), 3 states have call successors, (52) Word has length 483 [2021-11-20 23:59:43,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:59:43,885 INFO L225 Difference]: With dead ends: 7174 [2021-11-20 23:59:43,885 INFO L226 Difference]: Without dead ends: 4264 [2021-11-20 23:59:43,901 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 [2021-11-20 23:59:43,906 INFO L933 BasicCegarLoop]: 2367 mSDtfsCounter, 1243 mSDsluCounter, 1574 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 41 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1243 SdHoareTripleChecker+Valid, 3734 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:59:43,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1243 Valid, 3734 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 654 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2021-11-20 23:59:43,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4264 states. [2021-11-20 23:59:44,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4264 to 4248. [2021-11-20 23:59:44,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4248 states, 2707 states have (on average 1.328777244181751) internal successors, (3597), 2807 states have internal predecessors, (3597), 1069 states have call successors, (1069), 476 states have call predecessors, (1069), 471 states have return successors, (1068), 1035 states have call predecessors, (1068), 1068 states have call successors, (1068) [2021-11-20 23:59:44,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4248 states to 4248 states and 5734 transitions. [2021-11-20 23:59:44,160 INFO L78 Accepts]: Start accepts. Automaton has 4248 states and 5734 transitions. Word has length 483 [2021-11-20 23:59:44,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:59:44,163 INFO L470 AbstractCegarLoop]: Abstraction has 4248 states and 5734 transitions. [2021-11-20 23:59:44,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (55), 2 states have call predecessors, (55), 1 states have return successors, (52), 3 states have call predecessors, (52), 3 states have call successors, (52) [2021-11-20 23:59:44,164 INFO L276 IsEmpty]: Start isEmpty. Operand 4248 states and 5734 transitions. [2021-11-20 23:59:44,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2021-11-20 23:59:44,197 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:59:44,198 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 9, 9, 9, 9, 9, 9, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:59:44,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 23:59:44,199 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:59:44,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:59:44,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1141511879, now seen corresponding path program 1 times [2021-11-20 23:59:44,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:59:44,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242433230] [2021-11-20 23:59:44,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:59:44,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:59:44,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:59:44,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2591 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2591 trivial. 0 not checked. [2021-11-20 23:59:44,797 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:59:44,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242433230] [2021-11-20 23:59:44,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242433230] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:59:44,798 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:59:44,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:59:44,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707154809] [2021-11-20 23:59:44,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:59:44,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:59:44,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:59:44,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:59:44,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:59:44,801 INFO L87 Difference]: Start difference. First operand 4248 states and 5734 transitions. Second operand has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 2 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2021-11-20 23:59:46,839 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-20 23:59:51,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:59:51,264 INFO L93 Difference]: Finished difference Result 8468 states and 11439 transitions. [2021-11-20 23:59:51,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 23:59:51,266 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 2 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) Word has length 499 [2021-11-20 23:59:51,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:59:51,308 INFO L225 Difference]: With dead ends: 8468 [2021-11-20 23:59:51,308 INFO L226 Difference]: Without dead ends: 4275 [2021-11-20 23:59:51,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-20 23:59:51,334 INFO L933 BasicCegarLoop]: 1459 mSDtfsCounter, 24 mSDsluCounter, 4975 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 14 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 5784 SdHoareTripleChecker+Invalid, 928 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2021-11-20 23:59:51,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 5784 Invalid, 928 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 913 Invalid, 1 Unknown, 0 Unchecked, 6.2s Time] [2021-11-20 23:59:51,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4275 states. [2021-11-20 23:59:51,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4275 to 4254. [2021-11-20 23:59:51,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4254 states, 2713 states have (on average 1.3280501290084776) internal successors, (3603), 2813 states have internal predecessors, (3603), 1069 states have call successors, (1069), 476 states have call predecessors, (1069), 471 states have return successors, (1068), 1035 states have call predecessors, (1068), 1068 states have call successors, (1068) [2021-11-20 23:59:51,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4254 states to 4254 states and 5740 transitions. [2021-11-20 23:59:51,647 INFO L78 Accepts]: Start accepts. Automaton has 4254 states and 5740 transitions. Word has length 499 [2021-11-20 23:59:51,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:59:51,648 INFO L470 AbstractCegarLoop]: Abstraction has 4254 states and 5740 transitions. [2021-11-20 23:59:51,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 2 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2021-11-20 23:59:51,650 INFO L276 IsEmpty]: Start isEmpty. Operand 4254 states and 5740 transitions. [2021-11-20 23:59:51,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2021-11-20 23:59:51,674 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:59:51,674 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 9, 9, 9, 9, 9, 9, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:59:51,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 23:59:51,675 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:59:51,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:59:51,676 INFO L85 PathProgramCache]: Analyzing trace with hash 2129448288, now seen corresponding path program 1 times [2021-11-20 23:59:51,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:59:51,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943589800] [2021-11-20 23:59:51,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:59:51,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:59:52,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:59:52,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2829 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 2813 trivial. 0 not checked. [2021-11-20 23:59:52,860 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:59:52,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943589800] [2021-11-20 23:59:52,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943589800] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:59:52,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:59:52,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-20 23:59:52,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724856819] [2021-11-20 23:59:52,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:59:52,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 23:59:52,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:59:52,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 23:59:52,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-11-20 23:59:52,865 INFO L87 Difference]: Start difference. First operand 4254 states and 5740 transitions. Second operand has 12 states, 7 states have (on average 17.714285714285715) internal successors, (124), 9 states have internal predecessors, (124), 4 states have call successors, (55), 2 states have call predecessors, (55), 4 states have return successors, (52), 5 states have call predecessors, (52), 4 states have call successors, (52) [2021-11-20 23:59:54,912 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:00:09,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:00:09,159 INFO L93 Difference]: Finished difference Result 9623 states and 13304 transitions. [2021-11-21 00:00:09,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-21 00:00:09,160 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 7 states have (on average 17.714285714285715) internal successors, (124), 9 states have internal predecessors, (124), 4 states have call successors, (55), 2 states have call predecessors, (55), 4 states have return successors, (52), 5 states have call predecessors, (52), 4 states have call successors, (52) Word has length 500 [2021-11-21 00:00:09,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:00:09,218 INFO L225 Difference]: With dead ends: 9623 [2021-11-21 00:00:09,219 INFO L226 Difference]: Without dead ends: 5424 [2021-11-21 00:00:09,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-11-21 00:00:09,246 INFO L933 BasicCegarLoop]: 1917 mSDtfsCounter, 1090 mSDsluCounter, 20323 mSDsCounter, 0 mSdLazyCounter, 2747 mSolverCounterSat, 302 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1091 SdHoareTripleChecker+Valid, 19896 SdHoareTripleChecker+Invalid, 3050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 2747 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.7s IncrementalHoareTripleChecker+Time [2021-11-21 00:00:09,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1091 Valid, 19896 Invalid, 3050 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [302 Valid, 2747 Invalid, 1 Unknown, 0 Unchecked, 15.7s Time] [2021-11-21 00:00:09,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5424 states. [2021-11-21 00:00:09,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5424 to 4266. [2021-11-21 00:00:09,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4266 states, 2722 states have (on average 1.3269654665686994) internal successors, (3612), 2822 states have internal predecessors, (3612), 1072 states have call successors, (1072), 476 states have call predecessors, (1072), 471 states have return successors, (1071), 1038 states have call predecessors, (1071), 1071 states have call successors, (1071) [2021-11-21 00:00:09,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4266 states to 4266 states and 5755 transitions. [2021-11-21 00:00:09,612 INFO L78 Accepts]: Start accepts. Automaton has 4266 states and 5755 transitions. Word has length 500 [2021-11-21 00:00:09,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:00:09,613 INFO L470 AbstractCegarLoop]: Abstraction has 4266 states and 5755 transitions. [2021-11-21 00:00:09,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 7 states have (on average 17.714285714285715) internal successors, (124), 9 states have internal predecessors, (124), 4 states have call successors, (55), 2 states have call predecessors, (55), 4 states have return successors, (52), 5 states have call predecessors, (52), 4 states have call successors, (52) [2021-11-21 00:00:09,614 INFO L276 IsEmpty]: Start isEmpty. Operand 4266 states and 5755 transitions. [2021-11-21 00:00:09,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2021-11-21 00:00:09,647 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:00:09,648 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 9, 9, 9, 9, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:00:09,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-21 00:00:09,648 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:00:09,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:00:09,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1259732984, now seen corresponding path program 1 times [2021-11-21 00:00:09,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:00:09,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491216736] [2021-11-21 00:00:09,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:09,650 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:00:09,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:10,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2849 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 2829 trivial. 0 not checked. [2021-11-21 00:00:10,360 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:00:10,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491216736] [2021-11-21 00:00:10,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491216736] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:00:10,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602824022] [2021-11-21 00:00:10,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:10,362 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:00:10,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902cab76-b81e-4978-b784-804947e69125/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:00:10,368 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902cab76-b81e-4978-b784-804947e69125/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:00:10,394 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902cab76-b81e-4978-b784-804947e69125/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-21 00:00:11,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:11,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 4635 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-21 00:00:11,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:00:12,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-11-21 00:00:13,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 00:00:13,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2849 backedges. 174 proven. 0 refuted. 0 times theorem prover too weak. 2675 trivial. 0 not checked. [2021-11-21 00:00:13,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:00:13,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602824022] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:00:13,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:00:13,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [5] total 14 [2021-11-21 00:00:13,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34709507] [2021-11-21 00:00:13,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:00:13,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 00:00:13,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:00:13,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 00:00:13,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:00:13,457 INFO L87 Difference]: Start difference. First operand 4266 states and 5755 transitions. Second operand has 11 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 4 states have call successors, (60), 3 states have call predecessors, (60), 5 states have return successors, (58), 6 states have call predecessors, (58), 4 states have call successors, (58) [2021-11-21 00:00:15,503 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:00:18,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:00:18,988 INFO L93 Difference]: Finished difference Result 9207 states and 12710 transitions. [2021-11-21 00:00:18,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-21 00:00:18,989 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 4 states have call successors, (60), 3 states have call predecessors, (60), 5 states have return successors, (58), 6 states have call predecessors, (58), 4 states have call successors, (58) Word has length 530 [2021-11-21 00:00:18,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:00:19,045 INFO L225 Difference]: With dead ends: 9207 [2021-11-21 00:00:19,046 INFO L226 Difference]: Without dead ends: 4996 [2021-11-21 00:00:19,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 520 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-11-21 00:00:19,067 INFO L933 BasicCegarLoop]: 1640 mSDtfsCounter, 427 mSDsluCounter, 5943 mSDsCounter, 0 mSdLazyCounter, 846 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 7011 SdHoareTripleChecker+Invalid, 1516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 846 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 668 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-11-21 00:00:19,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 7011 Invalid, 1516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 846 Invalid, 1 Unknown, 668 Unchecked, 5.1s Time] [2021-11-21 00:00:19,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4996 states. [2021-11-21 00:00:19,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4996 to 4695. [2021-11-21 00:00:19,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4695 states, 3143 states have (on average 1.381164492523067) internal successors, (4341), 3243 states have internal predecessors, (4341), 1074 states have call successors, (1074), 482 states have call predecessors, (1074), 477 states have return successors, (1073), 1040 states have call predecessors, (1073), 1073 states have call successors, (1073) [2021-11-21 00:00:19,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4695 states to 4695 states and 6488 transitions. [2021-11-21 00:00:19,362 INFO L78 Accepts]: Start accepts. Automaton has 4695 states and 6488 transitions. Word has length 530 [2021-11-21 00:00:19,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:00:19,364 INFO L470 AbstractCegarLoop]: Abstraction has 4695 states and 6488 transitions. [2021-11-21 00:00:19,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 15.555555555555555) internal successors, (140), 9 states have internal predecessors, (140), 4 states have call successors, (60), 3 states have call predecessors, (60), 5 states have return successors, (58), 6 states have call predecessors, (58), 4 states have call successors, (58) [2021-11-21 00:00:19,364 INFO L276 IsEmpty]: Start isEmpty. Operand 4695 states and 6488 transitions. [2021-11-21 00:00:19,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 536 [2021-11-21 00:00:19,391 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:00:19,392 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 9, 9, 9, 9, 9, 9, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:00:19,449 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902cab76-b81e-4978-b784-804947e69125/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-21 00:00:19,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902cab76-b81e-4978-b784-804947e69125/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-21 00:00:19,615 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:00:19,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:00:19,615 INFO L85 PathProgramCache]: Analyzing trace with hash 760857449, now seen corresponding path program 1 times [2021-11-21 00:00:19,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:00:19,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925652235] [2021-11-21 00:00:19,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:19,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:00:19,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:20,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2595 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2593 trivial. 0 not checked. [2021-11-21 00:00:20,054 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:00:20,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925652235] [2021-11-21 00:00:20,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925652235] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:00:20,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-21 00:00:20,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-21 00:00:20,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506225721] [2021-11-21 00:00:20,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:00:20,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-21 00:00:20,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:00:20,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-21 00:00:20,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-21 00:00:20,057 INFO L87 Difference]: Start difference. First operand 4695 states and 6488 transitions. Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (65), 2 states have call predecessors, (65), 1 states have return successors, (61), 2 states have call predecessors, (61), 2 states have call successors, (61) [2021-11-21 00:00:22,095 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:00:25,069 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:00:27,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:00:27,312 INFO L93 Difference]: Finished difference Result 9371 states and 12956 transitions. [2021-11-21 00:00:27,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-21 00:00:27,313 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (65), 2 states have call predecessors, (65), 1 states have return successors, (61), 2 states have call predecessors, (61), 2 states have call successors, (61) Word has length 535 [2021-11-21 00:00:27,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:00:27,348 INFO L225 Difference]: With dead ends: 9371 [2021-11-21 00:00:27,349 INFO L226 Difference]: Without dead ends: 4731 [2021-11-21 00:00:27,368 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 00:00:27,369 INFO L933 BasicCegarLoop]: 1466 mSDtfsCounter, 17 mSDsluCounter, 3313 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 4350 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:00:27,369 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 4350 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 696 Invalid, 1 Unknown, 0 Unchecked, 7.0s Time] [2021-11-21 00:00:27,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4731 states. [2021-11-21 00:00:27,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4731 to 4701. [2021-11-21 00:00:27,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4701 states, 3149 states have (on average 1.3804382343601143) internal successors, (4347), 3249 states have internal predecessors, (4347), 1074 states have call successors, (1074), 482 states have call predecessors, (1074), 477 states have return successors, (1073), 1040 states have call predecessors, (1073), 1073 states have call successors, (1073) [2021-11-21 00:00:27,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4701 states to 4701 states and 6494 transitions. [2021-11-21 00:00:27,629 INFO L78 Accepts]: Start accepts. Automaton has 4701 states and 6494 transitions. Word has length 535 [2021-11-21 00:00:27,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:00:27,631 INFO L470 AbstractCegarLoop]: Abstraction has 4701 states and 6494 transitions. [2021-11-21 00:00:27,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 4 states have internal predecessors, (157), 2 states have call successors, (65), 2 states have call predecessors, (65), 1 states have return successors, (61), 2 states have call predecessors, (61), 2 states have call successors, (61) [2021-11-21 00:00:27,631 INFO L276 IsEmpty]: Start isEmpty. Operand 4701 states and 6494 transitions. [2021-11-21 00:00:27,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2021-11-21 00:00:27,657 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:00:27,658 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 9, 9, 9, 9, 9, 9, 5, 5, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:00:27,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-21 00:00:27,658 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:00:27,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:00:27,659 INFO L85 PathProgramCache]: Analyzing trace with hash -514269895, now seen corresponding path program 1 times [2021-11-21 00:00:27,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:00:27,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492023066] [2021-11-21 00:00:27,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:27,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:00:27,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:28,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2861 backedges. 22 proven. 4 refuted. 0 times theorem prover too weak. 2835 trivial. 0 not checked. [2021-11-21 00:00:28,263 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:00:28,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492023066] [2021-11-21 00:00:28,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492023066] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:00:28,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67337081] [2021-11-21 00:00:28,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:28,265 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:00:28,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902cab76-b81e-4978-b784-804947e69125/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:00:28,266 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902cab76-b81e-4978-b784-804947e69125/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:00:28,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902cab76-b81e-4978-b784-804947e69125/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-21 00:00:29,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:29,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 4688 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-21 00:00:29,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:00:30,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-11-21 00:00:30,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-21 00:00:31,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2861 backedges. 180 proven. 0 refuted. 0 times theorem prover too weak. 2681 trivial. 0 not checked. [2021-11-21 00:00:31,056 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-21 00:00:31,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67337081] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-21 00:00:31,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-21 00:00:31,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [5] total 14 [2021-11-21 00:00:31,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843195045] [2021-11-21 00:00:31,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-21 00:00:31,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-21 00:00:31,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-21 00:00:31,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-21 00:00:31,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-11-21 00:00:31,060 INFO L87 Difference]: Start difference. First operand 4701 states and 6494 transitions. Second operand has 11 states, 9 states have (on average 16.22222222222222) internal successors, (146), 9 states have internal predecessors, (146), 5 states have call successors, (61), 4 states have call predecessors, (61), 6 states have return successors, (59), 7 states have call predecessors, (59), 5 states have call successors, (59) [2021-11-21 00:00:33,103 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-21 00:00:43,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-21 00:00:43,485 INFO L93 Difference]: Finished difference Result 11063 states and 15311 transitions. [2021-11-21 00:00:43,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-21 00:00:43,486 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 16.22222222222222) internal successors, (146), 9 states have internal predecessors, (146), 5 states have call successors, (61), 4 states have call predecessors, (61), 6 states have return successors, (59), 7 states have call predecessors, (59), 5 states have call successors, (59) Word has length 540 [2021-11-21 00:00:43,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-21 00:00:43,520 INFO L225 Difference]: With dead ends: 11063 [2021-11-21 00:00:43,520 INFO L226 Difference]: Without dead ends: 6417 [2021-11-21 00:00:43,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 530 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2021-11-21 00:00:43,540 INFO L933 BasicCegarLoop]: 1745 mSDtfsCounter, 609 mSDsluCounter, 13355 mSDsCounter, 0 mSdLazyCounter, 4018 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 13593 SdHoareTripleChecker+Invalid, 4695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 4018 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 670 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2021-11-21 00:00:43,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [611 Valid, 13593 Invalid, 4695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 4018 Invalid, 1 Unknown, 670 Unchecked, 12.0s Time] [2021-11-21 00:00:43,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6417 states. [2021-11-21 00:00:43,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6417 to 6080. [2021-11-21 00:00:43,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6080 states, 4136 states have (on average 1.3965183752417796) internal successors, (5776), 4285 states have internal predecessors, (5776), 1328 states have call successors, (1328), 631 states have call predecessors, (1328), 615 states have return successors, (1343), 1239 states have call predecessors, (1343), 1327 states have call successors, (1343) [2021-11-21 00:00:43,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6080 states to 6080 states and 8447 transitions. [2021-11-21 00:00:43,970 INFO L78 Accepts]: Start accepts. Automaton has 6080 states and 8447 transitions. Word has length 540 [2021-11-21 00:00:43,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-21 00:00:43,972 INFO L470 AbstractCegarLoop]: Abstraction has 6080 states and 8447 transitions. [2021-11-21 00:00:43,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 9 states have (on average 16.22222222222222) internal successors, (146), 9 states have internal predecessors, (146), 5 states have call successors, (61), 4 states have call predecessors, (61), 6 states have return successors, (59), 7 states have call predecessors, (59), 5 states have call successors, (59) [2021-11-21 00:00:43,972 INFO L276 IsEmpty]: Start isEmpty. Operand 6080 states and 8447 transitions. [2021-11-21 00:00:44,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2021-11-21 00:00:44,006 INFO L506 BasicCegarLoop]: Found error trace [2021-11-21 00:00:44,007 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 9, 9, 9, 9, 9, 9, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:00:44,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902cab76-b81e-4978-b784-804947e69125/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-21 00:00:44,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902cab76-b81e-4978-b784-804947e69125/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:00:44,223 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-21 00:00:44,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-21 00:00:44,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1208180788, now seen corresponding path program 1 times [2021-11-21 00:00:44,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-21 00:00:44,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593514768] [2021-11-21 00:00:44,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:44,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-21 00:00:44,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:44,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2864 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 2840 trivial. 0 not checked. [2021-11-21 00:00:44,859 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-21 00:00:44,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593514768] [2021-11-21 00:00:44,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593514768] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:00:44,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567881263] [2021-11-21 00:00:44,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-21 00:00:44,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-21 00:00:44,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902cab76-b81e-4978-b784-804947e69125/bin/utaipan-TEXQjIfE4P/z3 [2021-11-21 00:00:44,867 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902cab76-b81e-4978-b784-804947e69125/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-21 00:00:44,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_902cab76-b81e-4978-b784-804947e69125/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-21 00:00:46,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-21 00:00:46,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 4736 conjuncts, 204 conjunts are in the unsatisfiable core [2021-11-21 00:00:46,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-21 00:00:46,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-21 00:00:47,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-21 00:00:47,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:00:47,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:00:47,614 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-21 00:00:47,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-21 00:00:47,703 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-21 00:00:47,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 11 [2021-11-21 00:00:47,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:00:47,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-21 00:00:47,975 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-21 00:00:47,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 37 [2021-11-21 00:00:48,191 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-21 00:00:48,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 22 [2021-11-21 00:00:48,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2021-11-21 00:00:48,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2021-11-21 00:00:48,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 19 [2021-11-21 00:00:48,865 INFO L354 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2021-11-21 00:00:48,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 39 treesize of output 57 [2021-11-21 00:00:50,090 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-21 00:00:50,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 41 [2021-11-21 00:00:51,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:00:51,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 31 [2021-11-21 00:00:51,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:00:51,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 16 [2021-11-21 00:00:51,882 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-21 00:00:51,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 41 [2021-11-21 00:00:52,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:00:52,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 26 [2021-11-21 00:00:52,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2021-11-21 00:00:52,606 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-21 00:00:52,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 41 [2021-11-21 00:00:53,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:00:53,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 26 [2021-11-21 00:00:53,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 6 [2021-11-21 00:00:53,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 84 [2021-11-21 00:00:53,400 INFO L354 Elim1Store]: treesize reduction 199, result has 12.3 percent of original size [2021-11-21 00:00:53,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 72 [2021-11-21 00:00:53,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 38 [2021-11-21 00:00:53,444 INFO L354 Elim1Store]: treesize reduction 96, result has 16.5 percent of original size [2021-11-21 00:00:53,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 35 treesize of output 28 [2021-11-21 00:00:53,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:00:53,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:00:53,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:00:53,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2021-11-21 00:01:03,658 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 00:01:03,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 31 [2021-11-21 00:01:03,673 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-21 00:01:03,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 23 [2021-11-21 00:01:36,983 INFO L354 Elim1Store]: treesize reduction 80, result has 19.2 percent of original size [2021-11-21 00:01:36,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 118 treesize of output 120 [2021-11-21 00:01:37,008 INFO L354 Elim1Store]: treesize reduction 66, result has 14.3 percent of original size [2021-11-21 00:01:37,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 105 treesize of output 106 [2021-11-21 00:01:37,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 86 [2021-11-21 00:01:43,408 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-21 00:01:43,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 92 treesize of output 62 [2021-11-21 00:01:43,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 44 [2021-11-21 00:01:43,435 INFO L354 Elim1Store]: treesize reduction 29, result has 25.6 percent of original size [2021-11-21 00:01:43,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 44 [2021-11-21 00:01:43,461 INFO L354 Elim1Store]: treesize reduction 64, result has 32.6 percent of original size [2021-11-21 00:01:43,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 47 [2021-11-21 00:01:43,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2021-11-21 00:01:43,630 INFO L354 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2021-11-21 00:01:43,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 41 [2021-11-21 00:01:43,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 12 [2021-11-21 00:01:43,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 10 [2021-11-21 00:01:54,217 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-21 00:01:54,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 60 [2021-11-21 00:01:54,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-21 00:02:01,530 INFO L354 Elim1Store]: treesize reduction 126, result has 14.3 percent of original size [2021-11-21 00:02:01,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 77 treesize of output 89 [2021-11-21 00:02:01,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 89 [2021-11-21 00:02:01,777 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:02:01,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 70 [2021-11-21 00:02:01,971 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-21 00:02:01,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 62 treesize of output 66 [2021-11-21 00:07:40,806 WARN L227 SmtUtils]: Spent 6.02s on a formula simplification that was a NOOP. DAG size: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-21 00:07:41,139 INFO L354 Elim1Store]: treesize reduction 48, result has 78.7 percent of original size [2021-11-21 00:07:41,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 172 treesize of output 318 [2021-11-21 00:07:43,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-11-21 00:07:43,501 INFO L134 CoverageAnalysis]: Checked inductivity of 2864 backedges. 930 proven. 96 refuted. 0 times theorem prover too weak. 1838 trivial. 0 not checked. [2021-11-21 00:07:43,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-21 00:08:11,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567881263] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-21 00:08:11,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [908724014] [2021-11-21 00:08:11,954 INFO L159 IcfgInterpreter]: Started Sifa with 219 locations of interest [2021-11-21 00:08:11,954 INFO L166 IcfgInterpreter]: Building call graph [2021-11-21 00:08:11,962 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-21 00:08:11,969 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-21 00:08:11,969 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-21 00:08:30,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:30,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:30,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:30,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:30,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:30,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:30,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:30,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:30,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-21 00:08:31,170 INFO L244 Elim1Store]: Index analysis took 1205 ms