./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-08_1a-drivers--block--loop.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfd99cb-9c5a-4ec9-aeaa-0fb98f710e85/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfd99cb-9c5a-4ec9-aeaa-0fb98f710e85/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfd99cb-9c5a-4ec9-aeaa-0fb98f710e85/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfd99cb-9c5a-4ec9-aeaa-0fb98f710e85/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--block--loop.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfd99cb-9c5a-4ec9-aeaa-0fb98f710e85/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfd99cb-9c5a-4ec9-aeaa-0fb98f710e85/bin/utaipan-eEHZpOm5b7 --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 b45d894549c3d959709f16d175c155effcb8f4008755bf9537dca57ce5b6aecf --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 18:13:16,062 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 18:13:16,065 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 18:13:16,118 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 18:13:16,119 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 18:13:16,123 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 18:13:16,125 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 18:13:16,128 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 18:13:16,130 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 18:13:16,131 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 18:13:16,132 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 18:13:16,134 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 18:13:16,134 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 18:13:16,136 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 18:13:16,137 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 18:13:16,139 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 18:13:16,140 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 18:13:16,141 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 18:13:16,143 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 18:13:16,146 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 18:13:16,147 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 18:13:16,149 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 18:13:16,150 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 18:13:16,151 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 18:13:16,155 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 18:13:16,155 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 18:13:16,155 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 18:13:16,156 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 18:13:16,157 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 18:13:16,158 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 18:13:16,159 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 18:13:16,159 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 18:13:16,160 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 18:13:16,166 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 18:13:16,168 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 18:13:16,168 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 18:13:16,169 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 18:13:16,169 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 18:13:16,169 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 18:13:16,170 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 18:13:16,171 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 18:13:16,172 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfd99cb-9c5a-4ec9-aeaa-0fb98f710e85/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-64bit-Taipan_Default.epf [2021-11-25 18:13:16,225 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 18:13:16,225 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 18:13:16,225 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 18:13:16,226 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 18:13:16,233 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 18:13:16,233 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 18:13:16,233 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 18:13:16,233 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 18:13:16,234 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 18:13:16,234 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 18:13:16,235 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 18:13:16,235 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 18:13:16,235 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 18:13:16,235 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 18:13:16,236 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 18:13:16,236 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 18:13:16,236 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 18:13:16,236 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 18:13:16,237 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 18:13:16,238 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 18:13:16,238 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 18:13:16,238 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 18:13:16,238 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 18:13:16,238 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 18:13:16,239 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 18:13:16,239 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 18:13:16,240 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 18:13:16,241 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 18:13:16,241 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 18:13:16,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:13:16,241 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 18:13:16,241 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 18:13:16,253 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 18:13:16,253 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 18:13:16,253 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 18:13:16,253 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 18:13:16,254 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 18:13:16,254 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 18:13:16,254 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_fdfd99cb-9c5a-4ec9-aeaa-0fb98f710e85/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfd99cb-9c5a-4ec9-aeaa-0fb98f710e85/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b45d894549c3d959709f16d175c155effcb8f4008755bf9537dca57ce5b6aecf [2021-11-25 18:13:16,537 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 18:13:16,557 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 18:13:16,559 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 18:13:16,560 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 18:13:16,561 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 18:13:16,562 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfd99cb-9c5a-4ec9-aeaa-0fb98f710e85/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--block--loop.ko-entry_point.cil.out.i [2021-11-25 18:13:16,619 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfd99cb-9c5a-4ec9-aeaa-0fb98f710e85/bin/utaipan-eEHZpOm5b7/data/cc7643094/c266504cd7b945cbb4689f07fa267c46/FLAG9ebce6c5d [2021-11-25 18:13:17,481 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 18:13:17,482 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfd99cb-9c5a-4ec9-aeaa-0fb98f710e85/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--block--loop.ko-entry_point.cil.out.i [2021-11-25 18:13:17,545 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfd99cb-9c5a-4ec9-aeaa-0fb98f710e85/bin/utaipan-eEHZpOm5b7/data/cc7643094/c266504cd7b945cbb4689f07fa267c46/FLAG9ebce6c5d [2021-11-25 18:13:17,915 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfd99cb-9c5a-4ec9-aeaa-0fb98f710e85/bin/utaipan-eEHZpOm5b7/data/cc7643094/c266504cd7b945cbb4689f07fa267c46 [2021-11-25 18:13:17,919 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 18:13:17,920 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 18:13:17,922 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 18:13:17,922 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 18:13:17,925 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 18:13:17,927 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:13:17" (1/1) ... [2021-11-25 18:13:17,928 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2cf93e9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:13:17, skipping insertion in model container [2021-11-25 18:13:17,928 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:13:17" (1/1) ... [2021-11-25 18:13:17,936 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 18:13:18,077 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 18:13:19,905 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_fdfd99cb-9c5a-4ec9-aeaa-0fb98f710e85/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--block--loop.ko-entry_point.cil.out.i[237426,237439] [2021-11-25 18:13:19,993 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:13:20,047 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 18:13:20,465 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_fdfd99cb-9c5a-4ec9-aeaa-0fb98f710e85/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--block--loop.ko-entry_point.cil.out.i[237426,237439] [2021-11-25 18:13:20,476 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 18:13:20,595 INFO L208 MainTranslator]: Completed translation [2021-11-25 18:13:20,596 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:13:20 WrapperNode [2021-11-25 18:13:20,596 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 18:13:20,597 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 18:13:20,597 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 18:13:20,597 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 18:13:20,605 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:13:20" (1/1) ... [2021-11-25 18:13:20,734 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:13:20" (1/1) ... [2021-11-25 18:13:20,955 INFO L137 Inliner]: procedures = 311, calls = 2050, calls flagged for inlining = 159, calls inlined = 157, statements flattened = 5633 [2021-11-25 18:13:20,956 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 18:13:20,957 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 18:13:20,957 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 18:13:20,958 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 18:13:20,966 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:13:20" (1/1) ... [2021-11-25 18:13:20,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:13:20" (1/1) ... [2021-11-25 18:13:21,019 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:13:20" (1/1) ... [2021-11-25 18:13:21,030 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:13:20" (1/1) ... [2021-11-25 18:13:21,240 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:13:20" (1/1) ... [2021-11-25 18:13:21,262 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:13:20" (1/1) ... [2021-11-25 18:13:21,308 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:13:20" (1/1) ... [2021-11-25 18:13:21,333 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 18:13:21,334 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 18:13:21,334 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 18:13:21,334 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 18:13:21,335 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:13:20" (1/1) ... [2021-11-25 18:13:21,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 18:13:21,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfd99cb-9c5a-4ec9-aeaa-0fb98f710e85/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:13:21,370 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfd99cb-9c5a-4ec9-aeaa-0fb98f710e85/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 18:13:21,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfd99cb-9c5a-4ec9-aeaa-0fb98f710e85/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 18:13:21,415 INFO L130 BoogieDeclarations]: Found specification of procedure __kuid_val [2021-11-25 18:13:21,416 INFO L138 BoogieDeclarations]: Found implementation of procedure __kuid_val [2021-11-25 18:13:21,416 INFO L130 BoogieDeclarations]: Found specification of procedure loop_add [2021-11-25 18:13:21,416 INFO L138 BoogieDeclarations]: Found implementation of procedure loop_add [2021-11-25 18:13:21,416 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-25 18:13:21,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-25 18:13:21,416 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-25 18:13:21,416 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-25 18:13:21,417 INFO L130 BoogieDeclarations]: Found specification of procedure iov_iter_bvec [2021-11-25 18:13:21,417 INFO L138 BoogieDeclarations]: Found implementation of procedure iov_iter_bvec [2021-11-25 18:13:21,417 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-11-25 18:13:21,417 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-11-25 18:13:21,417 INFO L130 BoogieDeclarations]: Found specification of procedure file_inode [2021-11-25 18:13:21,417 INFO L138 BoogieDeclarations]: Found implementation of procedure file_inode [2021-11-25 18:13:21,417 INFO L130 BoogieDeclarations]: Found specification of procedure loop_control_ioctl [2021-11-25 18:13:21,417 INFO L138 BoogieDeclarations]: Found implementation of procedure loop_control_ioctl [2021-11-25 18:13:21,418 INFO L130 BoogieDeclarations]: Found specification of procedure debug_lockdep_rcu_enabled [2021-11-25 18:13:21,418 INFO L138 BoogieDeclarations]: Found implementation of procedure debug_lockdep_rcu_enabled [2021-11-25 18:13:21,418 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-11-25 18:13:21,418 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-11-25 18:13:21,418 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-25 18:13:21,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-25 18:13:21,418 INFO L130 BoogieDeclarations]: Found specification of procedure kobject_uevent [2021-11-25 18:13:21,419 INFO L138 BoogieDeclarations]: Found implementation of procedure kobject_uevent [2021-11-25 18:13:21,419 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2021-11-25 18:13:21,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2021-11-25 18:13:21,419 INFO L130 BoogieDeclarations]: Found specification of procedure loop_remove [2021-11-25 18:13:21,419 INFO L138 BoogieDeclarations]: Found implementation of procedure loop_remove [2021-11-25 18:13:21,419 INFO L130 BoogieDeclarations]: Found specification of procedure transfer_xor [2021-11-25 18:13:21,419 INFO L138 BoogieDeclarations]: Found implementation of procedure transfer_xor [2021-11-25 18:13:21,419 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-25 18:13:21,420 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-25 18:13:21,420 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-25 18:13:21,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-25 18:13:21,420 INFO L130 BoogieDeclarations]: Found specification of procedure huge_encode_dev [2021-11-25 18:13:21,420 INFO L138 BoogieDeclarations]: Found implementation of procedure huge_encode_dev [2021-11-25 18:13:21,420 INFO L130 BoogieDeclarations]: Found specification of procedure lo_do_transfer [2021-11-25 18:13:21,420 INFO L138 BoogieDeclarations]: Found implementation of procedure lo_do_transfer [2021-11-25 18:13:21,421 INFO L130 BoogieDeclarations]: Found specification of procedure blk_mq_unfreeze_queue [2021-11-25 18:13:21,421 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_mq_unfreeze_queue [2021-11-25 18:13:21,421 INFO L130 BoogieDeclarations]: Found specification of procedure activate_work_2 [2021-11-25 18:13:21,421 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_work_2 [2021-11-25 18:13:21,421 INFO L130 BoogieDeclarations]: Found specification of procedure lo_compat_ioctl [2021-11-25 18:13:21,421 INFO L138 BoogieDeclarations]: Found implementation of procedure lo_compat_ioctl [2021-11-25 18:13:21,421 INFO L130 BoogieDeclarations]: Found specification of procedure set_capacity [2021-11-25 18:13:21,421 INFO L138 BoogieDeclarations]: Found implementation of procedure set_capacity [2021-11-25 18:13:21,422 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2021-11-25 18:13:21,422 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2021-11-25 18:13:21,422 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-25 18:13:21,422 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-25 18:13:21,422 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-25 18:13:21,422 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-25 18:13:21,422 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR_OR_NULL [2021-11-25 18:13:21,422 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR_OR_NULL [2021-11-25 18:13:21,423 INFO L130 BoogieDeclarations]: Found specification of procedure loop_get_status [2021-11-25 18:13:21,423 INFO L138 BoogieDeclarations]: Found implementation of procedure loop_get_status [2021-11-25 18:13:21,423 INFO L130 BoogieDeclarations]: Found specification of procedure loop_handle_cmd [2021-11-25 18:13:21,423 INFO L138 BoogieDeclarations]: Found implementation of procedure loop_handle_cmd [2021-11-25 18:13:21,423 INFO L130 BoogieDeclarations]: Found specification of procedure loop_clr_fd [2021-11-25 18:13:21,423 INFO L138 BoogieDeclarations]: Found implementation of procedure loop_clr_fd [2021-11-25 18:13:21,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-25 18:13:21,423 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-25 18:13:21,424 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-25 18:13:21,424 INFO L130 BoogieDeclarations]: Found specification of procedure figure_loop_size [2021-11-25 18:13:21,424 INFO L138 BoogieDeclarations]: Found implementation of procedure figure_loop_size [2021-11-25 18:13:21,424 INFO L130 BoogieDeclarations]: Found specification of procedure get_size [2021-11-25 18:13:21,424 INFO L138 BoogieDeclarations]: Found implementation of procedure get_size [2021-11-25 18:13:21,424 INFO L130 BoogieDeclarations]: Found specification of procedure blk_mq_rq_to_pdu [2021-11-25 18:13:21,424 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_mq_rq_to_pdu [2021-11-25 18:13:21,424 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_pages [2021-11-25 18:13:21,425 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_pages [2021-11-25 18:13:21,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-25 18:13:21,425 INFO L130 BoogieDeclarations]: Found specification of procedure __xadd_wrong_size [2021-11-25 18:13:21,425 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_work_2 [2021-11-25 18:13:21,425 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_work_2 [2021-11-25 18:13:21,425 INFO L130 BoogieDeclarations]: Found specification of procedure __free_pages [2021-11-25 18:13:21,425 INFO L138 BoogieDeclarations]: Found implementation of procedure __free_pages [2021-11-25 18:13:21,425 INFO L130 BoogieDeclarations]: Found specification of procedure lo_write_bvec [2021-11-25 18:13:21,425 INFO L138 BoogieDeclarations]: Found implementation of procedure lo_write_bvec [2021-11-25 18:13:21,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-25 18:13:21,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-25 18:13:21,426 INFO L130 BoogieDeclarations]: Found specification of procedure capable [2021-11-25 18:13:21,426 INFO L138 BoogieDeclarations]: Found implementation of procedure capable [2021-11-25 18:13:21,426 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2021-11-25 18:13:21,426 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2021-11-25 18:13:21,426 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work_on [2021-11-25 18:13:21,426 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work_on [2021-11-25 18:13:21,427 INFO L130 BoogieDeclarations]: Found specification of procedure loop_set_status_old [2021-11-25 18:13:21,427 INFO L138 BoogieDeclarations]: Found implementation of procedure loop_set_status_old [2021-11-25 18:13:21,427 INFO L130 BoogieDeclarations]: Found specification of procedure fput [2021-11-25 18:13:21,427 INFO L138 BoogieDeclarations]: Found implementation of procedure fput [2021-11-25 18:13:21,427 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-25 18:13:21,427 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-25 18:13:21,427 INFO L130 BoogieDeclarations]: Found specification of procedure lockdep_init_map [2021-11-25 18:13:21,427 INFO L138 BoogieDeclarations]: Found implementation of procedure lockdep_init_map [2021-11-25 18:13:21,428 INFO L130 BoogieDeclarations]: Found specification of procedure loop_reread_partitions [2021-11-25 18:13:21,428 INFO L138 BoogieDeclarations]: Found implementation of procedure loop_reread_partitions [2021-11-25 18:13:21,428 INFO L130 BoogieDeclarations]: Found specification of procedure nonseekable_open [2021-11-25 18:13:21,428 INFO L130 BoogieDeclarations]: Found specification of procedure loop_set_capacity [2021-11-25 18:13:21,428 INFO L138 BoogieDeclarations]: Found implementation of procedure loop_set_capacity [2021-11-25 18:13:21,428 INFO L130 BoogieDeclarations]: Found specification of procedure vfs_iter_read [2021-11-25 18:13:21,428 INFO L138 BoogieDeclarations]: Found implementation of procedure vfs_iter_read [2021-11-25 18:13:21,428 INFO L130 BoogieDeclarations]: Found specification of procedure idr_for_each [2021-11-25 18:13:21,428 INFO L138 BoogieDeclarations]: Found implementation of procedure idr_for_each [2021-11-25 18:13:21,429 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-25 18:13:21,429 INFO L130 BoogieDeclarations]: Found specification of procedure blk_mq_free_tag_set [2021-11-25 18:13:21,429 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_mq_free_tag_set [2021-11-25 18:13:21,429 INFO L130 BoogieDeclarations]: Found specification of procedure ___might_sleep [2021-11-25 18:13:21,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ___might_sleep [2021-11-25 18:13:21,429 INFO L130 BoogieDeclarations]: Found specification of procedure misc_deregister [2021-11-25 18:13:21,429 INFO L138 BoogieDeclarations]: Found implementation of procedure misc_deregister [2021-11-25 18:13:21,430 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2021-11-25 18:13:21,430 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2021-11-25 18:13:21,430 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-25 18:13:21,430 INFO L130 BoogieDeclarations]: Found specification of procedure bio_advance_iter [2021-11-25 18:13:21,430 INFO L138 BoogieDeclarations]: Found implementation of procedure bio_advance_iter [2021-11-25 18:13:21,430 INFO L130 BoogieDeclarations]: Found specification of procedure loop_queue_write_work [2021-11-25 18:13:21,430 INFO L138 BoogieDeclarations]: Found implementation of procedure loop_queue_write_work [2021-11-25 18:13:21,430 INFO L130 BoogieDeclarations]: Found specification of procedure bd_set_size [2021-11-25 18:13:21,430 INFO L138 BoogieDeclarations]: Found implementation of procedure bd_set_size [2021-11-25 18:13:21,431 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-25 18:13:21,431 INFO L130 BoogieDeclarations]: Found specification of procedure fget [2021-11-25 18:13:21,431 INFO L138 BoogieDeclarations]: Found implementation of procedure fget [2021-11-25 18:13:21,431 INFO L130 BoogieDeclarations]: Found specification of procedure mapping_set_gfp_mask [2021-11-25 18:13:21,431 INFO L138 BoogieDeclarations]: Found implementation of procedure mapping_set_gfp_mask [2021-11-25 18:13:21,431 INFO L130 BoogieDeclarations]: Found specification of procedure xor_init [2021-11-25 18:13:21,431 INFO L138 BoogieDeclarations]: Found implementation of procedure xor_init [2021-11-25 18:13:21,431 INFO L130 BoogieDeclarations]: Found specification of procedure loop_set_status64 [2021-11-25 18:13:21,431 INFO L138 BoogieDeclarations]: Found implementation of procedure loop_set_status64 [2021-11-25 18:13:21,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-25 18:13:21,432 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-25 18:13:21,432 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_release_11 [2021-11-25 18:13:21,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_release_11 [2021-11-25 18:13:21,432 INFO L130 BoogieDeclarations]: Found specification of procedure zero_fill_bio [2021-11-25 18:13:21,432 INFO L138 BoogieDeclarations]: Found implementation of procedure zero_fill_bio [2021-11-25 18:13:21,432 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-25 18:13:21,432 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-25 18:13:21,432 INFO L130 BoogieDeclarations]: Found specification of procedure loop_attr_show [2021-11-25 18:13:21,432 INFO L138 BoogieDeclarations]: Found implementation of procedure loop_attr_show [2021-11-25 18:13:21,433 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-25 18:13:21,433 INFO L130 BoogieDeclarations]: Found specification of procedure copy_to_user [2021-11-25 18:13:21,433 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_to_user [2021-11-25 18:13:21,433 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-25 18:13:21,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-25 18:13:21,433 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irq [2021-11-25 18:13:21,433 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irq [2021-11-25 18:13:21,433 INFO L130 BoogieDeclarations]: Found specification of procedure __read_once_size [2021-11-25 18:13:21,434 INFO L138 BoogieDeclarations]: Found implementation of procedure __read_once_size [2021-11-25 18:13:21,434 INFO L130 BoogieDeclarations]: Found specification of procedure blk_mq_freeze_queue [2021-11-25 18:13:21,434 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_mq_freeze_queue [2021-11-25 18:13:21,434 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2021-11-25 18:13:21,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2021-11-25 18:13:21,434 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-25 18:13:21,434 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2021-11-25 18:13:21,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2021-11-25 18:13:21,435 INFO L130 BoogieDeclarations]: Found specification of procedure copy_from_user [2021-11-25 18:13:21,435 INFO L138 BoogieDeclarations]: Found implementation of procedure copy_from_user [2021-11-25 18:13:21,435 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 18:13:21,435 INFO L130 BoogieDeclarations]: Found specification of procedure get_loop_size [2021-11-25 18:13:21,435 INFO L138 BoogieDeclarations]: Found implementation of procedure get_loop_size [2021-11-25 18:13:21,435 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-25 18:13:21,435 INFO L130 BoogieDeclarations]: Found specification of procedure blk_cleanup_queue [2021-11-25 18:13:21,435 INFO L138 BoogieDeclarations]: Found implementation of procedure blk_cleanup_queue [2021-11-25 18:13:21,435 INFO L130 BoogieDeclarations]: Found specification of procedure loop_set_status [2021-11-25 18:13:21,436 INFO L138 BoogieDeclarations]: Found implementation of procedure loop_set_status [2021-11-25 18:13:21,436 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-25 18:13:21,436 INFO L130 BoogieDeclarations]: Found specification of procedure lo_ioctl [2021-11-25 18:13:21,436 INFO L138 BoogieDeclarations]: Found implementation of procedure lo_ioctl [2021-11-25 18:13:21,436 INFO L130 BoogieDeclarations]: Found specification of procedure spin_lock_irq [2021-11-25 18:13:21,436 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_lock_irq [2021-11-25 18:13:21,436 INFO L130 BoogieDeclarations]: Found specification of procedure ___ratelimit [2021-11-25 18:13:21,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ___ratelimit [2021-11-25 18:13:21,437 INFO L130 BoogieDeclarations]: Found specification of procedure idr_alloc [2021-11-25 18:13:21,437 INFO L138 BoogieDeclarations]: Found implementation of procedure idr_alloc [2021-11-25 18:13:21,437 INFO L130 BoogieDeclarations]: Found specification of procedure loop_release_xfer [2021-11-25 18:13:21,437 INFO L138 BoogieDeclarations]: Found implementation of procedure loop_release_xfer [2021-11-25 18:13:21,437 INFO L130 BoogieDeclarations]: Found specification of procedure _cond_resched [2021-11-25 18:13:21,437 INFO L138 BoogieDeclarations]: Found implementation of procedure _cond_resched [2021-11-25 18:13:21,437 INFO L130 BoogieDeclarations]: Found specification of procedure PTR_ERR [2021-11-25 18:13:21,437 INFO L138 BoogieDeclarations]: Found implementation of procedure PTR_ERR [2021-11-25 18:13:21,437 INFO L130 BoogieDeclarations]: Found specification of procedure call_and_disable_all_2 [2021-11-25 18:13:21,438 INFO L138 BoogieDeclarations]: Found implementation of procedure call_and_disable_all_2 [2021-11-25 18:13:21,438 INFO L130 BoogieDeclarations]: Found specification of procedure loop_switch [2021-11-25 18:13:21,438 INFO L138 BoogieDeclarations]: Found implementation of procedure loop_switch [2021-11-25 18:13:21,438 INFO L130 BoogieDeclarations]: Found specification of procedure loop_queue_read_work [2021-11-25 18:13:21,438 INFO L138 BoogieDeclarations]: Found implementation of procedure loop_queue_read_work [2021-11-25 18:13:21,438 INFO L130 BoogieDeclarations]: Found specification of procedure kmap_atomic [2021-11-25 18:13:21,438 INFO L138 BoogieDeclarations]: Found implementation of procedure kmap_atomic [2021-11-25 18:13:21,438 INFO L130 BoogieDeclarations]: Found specification of procedure __init_work [2021-11-25 18:13:21,438 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_work [2021-11-25 18:13:21,439 INFO L130 BoogieDeclarations]: Found specification of procedure mapping_gfp_mask [2021-11-25 18:13:21,439 INFO L138 BoogieDeclarations]: Found implementation of procedure mapping_gfp_mask [2021-11-25 18:13:21,439 INFO L130 BoogieDeclarations]: Found specification of procedure idr_remove [2021-11-25 18:13:21,439 INFO L138 BoogieDeclarations]: Found implementation of procedure idr_remove [2021-11-25 18:13:21,439 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-25 18:13:21,439 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-25 18:13:21,439 INFO L130 BoogieDeclarations]: Found specification of procedure __kunmap_atomic [2021-11-25 18:13:21,439 INFO L138 BoogieDeclarations]: Found implementation of procedure __kunmap_atomic [2021-11-25 18:13:21,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 18:13:21,439 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work [2021-11-25 18:13:21,440 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work [2021-11-25 18:13:21,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 18:13:21,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 18:13:21,440 INFO L130 BoogieDeclarations]: Found specification of procedure loop_lookup [2021-11-25 18:13:21,440 INFO L138 BoogieDeclarations]: Found implementation of procedure loop_lookup [2021-11-25 18:13:21,440 INFO L130 BoogieDeclarations]: Found specification of procedure loop_queue_rq [2021-11-25 18:13:21,440 INFO L138 BoogieDeclarations]: Found implementation of procedure loop_queue_rq [2021-11-25 18:13:22,374 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 18:13:22,378 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 18:13:22,782 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-25 18:13:30,159 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 18:13:31,576 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 18:13:31,576 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-25 18:13:31,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:13:31 BoogieIcfgContainer [2021-11-25 18:13:31,582 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 18:13:31,587 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 18:13:31,587 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 18:13:31,590 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 18:13:31,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:13:17" (1/3) ... [2021-11-25 18:13:31,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ba0930d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:13:31, skipping insertion in model container [2021-11-25 18:13:31,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:13:20" (2/3) ... [2021-11-25 18:13:31,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ba0930d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:13:31, skipping insertion in model container [2021-11-25 18:13:31,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:13:31" (3/3) ... [2021-11-25 18:13:31,593 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--block--loop.ko-entry_point.cil.out.i [2021-11-25 18:13:31,602 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 18:13:31,603 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 18:13:31,673 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 18:13:31,692 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 [2021-11-25 18:13:31,693 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 18:13:31,758 INFO L276 IsEmpty]: Start isEmpty. Operand has 1252 states, 794 states have (on average 1.3614609571788414) internal successors, (1081), 829 states have internal predecessors, (1081), 363 states have call successors, (363), 94 states have call predecessors, (363), 93 states have return successors, (350), 348 states have call predecessors, (350), 350 states have call successors, (350) [2021-11-25 18:13:31,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2021-11-25 18:13:31,806 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:13:31,808 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:13:31,809 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:13:31,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:13:31,814 INFO L85 PathProgramCache]: Analyzing trace with hash -280481047, now seen corresponding path program 1 times [2021-11-25 18:13:31,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:13:31,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820310906] [2021-11-25 18:13:31,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:13:31,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:13:32,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:13:33,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4531 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4531 trivial. 0 not checked. [2021-11-25 18:13:33,205 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:13:33,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820310906] [2021-11-25 18:13:33,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820310906] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:13:33,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:13:33,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:13:33,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669056969] [2021-11-25 18:13:33,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:13:33,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:13:33,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:13:33,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:13:33,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:13:33,266 INFO L87 Difference]: Start difference. First operand has 1252 states, 794 states have (on average 1.3614609571788414) internal successors, (1081), 829 states have internal predecessors, (1081), 363 states have call successors, (363), 94 states have call predecessors, (363), 93 states have return successors, (350), 348 states have call predecessors, (350), 350 states have call successors, (350) Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (53), 2 states have call predecessors, (53), 1 states have return successors, (52), 2 states have call predecessors, (52), 2 states have call successors, (52) [2021-11-25 18:13:35,158 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:13:37,364 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:13:41,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:13:41,256 INFO L93 Difference]: Finished difference Result 3522 states and 5078 transitions. [2021-11-25 18:13:41,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:13:41,262 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (53), 2 states have call predecessors, (53), 1 states have return successors, (52), 2 states have call predecessors, (52), 2 states have call successors, (52) Word has length 522 [2021-11-25 18:13:41,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:13:41,308 INFO L225 Difference]: With dead ends: 3522 [2021-11-25 18:13:41,308 INFO L226 Difference]: Without dead ends: 2339 [2021-11-25 18:13:41,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:13:41,331 INFO L933 BasicCegarLoop]: 1883 mSDtfsCounter, 1610 mSDsluCounter, 1748 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1610 SdHoareTripleChecker+Valid, 3439 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2021-11-25 18:13:41,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1610 Valid, 3439 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2021-11-25 18:13:41,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2339 states. [2021-11-25 18:13:41,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2339 to 2336. [2021-11-25 18:13:41,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2336 states, 1512 states have (on average 1.3531746031746033) internal successors, (2046), 1551 states have internal predecessors, (2046), 640 states have call successors, (640), 184 states have call predecessors, (640), 183 states have return successors, (638), 634 states have call predecessors, (638), 638 states have call successors, (638) [2021-11-25 18:13:41,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2336 states to 2336 states and 3324 transitions. [2021-11-25 18:13:41,689 INFO L78 Accepts]: Start accepts. Automaton has 2336 states and 3324 transitions. Word has length 522 [2021-11-25 18:13:41,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:13:41,698 INFO L470 AbstractCegarLoop]: Abstraction has 2336 states and 3324 transitions. [2021-11-25 18:13:41,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 2 states have call successors, (53), 2 states have call predecessors, (53), 1 states have return successors, (52), 2 states have call predecessors, (52), 2 states have call successors, (52) [2021-11-25 18:13:41,703 INFO L276 IsEmpty]: Start isEmpty. Operand 2336 states and 3324 transitions. [2021-11-25 18:13:41,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 545 [2021-11-25 18:13:41,737 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:13:41,738 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:13:41,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 18:13:41,738 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:13:41,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:13:41,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1822363867, now seen corresponding path program 1 times [2021-11-25 18:13:41,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:13:41,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899115301] [2021-11-25 18:13:41,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:13:41,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:13:42,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:13:42,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4531 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4531 trivial. 0 not checked. [2021-11-25 18:13:42,611 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:13:42,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899115301] [2021-11-25 18:13:42,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899115301] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:13:42,612 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:13:42,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:13:42,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789092802] [2021-11-25 18:13:42,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:13:42,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:13:42,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:13:42,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:13:42,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:13:42,618 INFO L87 Difference]: Start difference. First operand 2336 states and 3324 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) [2021-11-25 18:13:44,652 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:13:46,627 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:13:50,172 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:13:51,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:13:51,141 INFO L93 Difference]: Finished difference Result 5839 states and 8279 transitions. [2021-11-25 18:13:51,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:13:51,143 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) Word has length 544 [2021-11-25 18:13:51,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:13:51,184 INFO L225 Difference]: With dead ends: 5839 [2021-11-25 18:13:51,184 INFO L226 Difference]: Without dead ends: 3602 [2021-11-25 18:13:51,199 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 [2021-11-25 18:13:51,200 INFO L933 BasicCegarLoop]: 1725 mSDtfsCounter, 901 mSDsluCounter, 1739 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 901 SdHoareTripleChecker+Valid, 3267 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2021-11-25 18:13:51,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [901 Valid, 3267 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 424 Invalid, 1 Unknown, 0 Unchecked, 8.3s Time] [2021-11-25 18:13:51,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3602 states. [2021-11-25 18:13:51,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3602 to 3592. [2021-11-25 18:13:51,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3592 states, 2352 states have (on average 1.3630952380952381) internal successors, (3206), 2404 states have internal predecessors, (3206), 943 states have call successors, (943), 297 states have call predecessors, (943), 296 states have return successors, (941), 934 states have call predecessors, (941), 941 states have call successors, (941) [2021-11-25 18:13:51,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3592 states to 3592 states and 5090 transitions. [2021-11-25 18:13:51,487 INFO L78 Accepts]: Start accepts. Automaton has 3592 states and 5090 transitions. Word has length 544 [2021-11-25 18:13:51,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:13:51,489 INFO L470 AbstractCegarLoop]: Abstraction has 3592 states and 5090 transitions. [2021-11-25 18:13:51,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 2 states have call successors, (57), 2 states have call predecessors, (57), 1 states have return successors, (53), 2 states have call predecessors, (53), 2 states have call successors, (53) [2021-11-25 18:13:51,490 INFO L276 IsEmpty]: Start isEmpty. Operand 3592 states and 5090 transitions. [2021-11-25 18:13:51,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2021-11-25 18:13:51,510 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:13:51,510 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 18:13:51,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 18:13:51,511 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:13:51,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:13:51,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1494682149, now seen corresponding path program 1 times [2021-11-25 18:13:51,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:13:51,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206335410] [2021-11-25 18:13:51,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:13:51,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:13:51,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:13:52,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5021 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5021 trivial. 0 not checked. [2021-11-25 18:13:52,143 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:13:52,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206335410] [2021-11-25 18:13:52,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206335410] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:13:52,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:13:52,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:13:52,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719327970] [2021-11-25 18:13:52,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:13:52,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:13:52,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:13:52,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:13:52,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:13:52,147 INFO L87 Difference]: Start difference. First operand 3592 states and 5090 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (53), 2 states have call predecessors, (53), 1 states have return successors, (52), 2 states have call predecessors, (52), 2 states have call successors, (52) [2021-11-25 18:13:58,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:13:58,404 INFO L93 Difference]: Finished difference Result 10497 states and 14909 transitions. [2021-11-25 18:13:58,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:13:58,405 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (53), 2 states have call predecessors, (53), 1 states have return successors, (52), 2 states have call predecessors, (52), 2 states have call successors, (52) Word has length 542 [2021-11-25 18:13:58,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:13:58,474 INFO L225 Difference]: With dead ends: 10497 [2021-11-25 18:13:58,474 INFO L226 Difference]: Without dead ends: 6995 [2021-11-25 18:13:58,498 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 [2021-11-25 18:13:58,499 INFO L933 BasicCegarLoop]: 1982 mSDtfsCounter, 1575 mSDsluCounter, 1622 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1575 SdHoareTripleChecker+Valid, 3409 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-11-25 18:13:58,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1575 Valid, 3409 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2021-11-25 18:13:58,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6995 states. [2021-11-25 18:13:58,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6995 to 6991. [2021-11-25 18:13:58,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6991 states, 4593 states have (on average 1.3657740039190072) internal successors, (6273), 4691 states have internal predecessors, (6273), 1807 states have call successors, (1807), 591 states have call predecessors, (1807), 590 states have return successors, (1829), 1792 states have call predecessors, (1829), 1805 states have call successors, (1829) [2021-11-25 18:13:58,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6991 states to 6991 states and 9909 transitions. [2021-11-25 18:13:58,900 INFO L78 Accepts]: Start accepts. Automaton has 6991 states and 9909 transitions. Word has length 542 [2021-11-25 18:13:58,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:13:58,902 INFO L470 AbstractCegarLoop]: Abstraction has 6991 states and 9909 transitions. [2021-11-25 18:13:58,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 3 states have call successors, (53), 2 states have call predecessors, (53), 1 states have return successors, (52), 2 states have call predecessors, (52), 2 states have call successors, (52) [2021-11-25 18:13:58,902 INFO L276 IsEmpty]: Start isEmpty. Operand 6991 states and 9909 transitions. [2021-11-25 18:13:58,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 607 [2021-11-25 18:13:58,936 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:13:58,937 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 23, 23, 23, 23, 23, 23, 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] [2021-11-25 18:13:58,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 18:13:58,938 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:13:58,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:13:58,939 INFO L85 PathProgramCache]: Analyzing trace with hash 2138122428, now seen corresponding path program 1 times [2021-11-25 18:13:58,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:13:58,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222618607] [2021-11-25 18:13:58,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:13:58,940 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:13:59,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:13:59,583 INFO L134 CoverageAnalysis]: Checked inductivity of 5562 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5551 trivial. 0 not checked. [2021-11-25 18:13:59,584 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:13:59,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222618607] [2021-11-25 18:13:59,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222618607] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:13:59,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:13:59,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 18:13:59,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21646982] [2021-11-25 18:13:59,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:13:59,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 18:13:59,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:13:59,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 18:13:59,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 18:13:59,589 INFO L87 Difference]: Start difference. First operand 6991 states and 9909 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 3 states have call successors, (60), 2 states have call predecessors, (60), 1 states have return successors, (57), 3 states have call predecessors, (57), 3 states have call successors, (57) [2021-11-25 18:14:01,622 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:14:04,638 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:14:06,314 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.68s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:14:08,531 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:14:11,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:14:11,349 INFO L93 Difference]: Finished difference Result 18156 states and 25735 transitions. [2021-11-25 18:14:11,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 18:14:11,351 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 3 states have call successors, (60), 2 states have call predecessors, (60), 1 states have return successors, (57), 3 states have call predecessors, (57), 3 states have call successors, (57) Word has length 606 [2021-11-25 18:14:11,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:14:11,463 INFO L225 Difference]: With dead ends: 18156 [2021-11-25 18:14:11,463 INFO L226 Difference]: Without dead ends: 11264 [2021-11-25 18:14:11,505 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 [2021-11-25 18:14:11,507 INFO L933 BasicCegarLoop]: 2478 mSDtfsCounter, 1561 mSDsluCounter, 1724 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1561 SdHoareTripleChecker+Valid, 4008 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2021-11-25 18:14:11,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1561 Valid, 4008 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 543 Invalid, 1 Unknown, 0 Unchecked, 11.4s Time] [2021-11-25 18:14:11,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11264 states. [2021-11-25 18:14:12,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11264 to 11252. [2021-11-25 18:14:12,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11252 states, 7389 states have (on average 1.3629719853836784) internal successors, (10071), 7556 states have internal predecessors, (10071), 2912 states have call successors, (2912), 951 states have call predecessors, (2912), 950 states have return successors, (2950), 2888 states have call predecessors, (2950), 2910 states have call successors, (2950) [2021-11-25 18:14:12,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11252 states to 11252 states and 15933 transitions. [2021-11-25 18:14:12,288 INFO L78 Accepts]: Start accepts. Automaton has 11252 states and 15933 transitions. Word has length 606 [2021-11-25 18:14:12,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:14:12,290 INFO L470 AbstractCegarLoop]: Abstraction has 11252 states and 15933 transitions. [2021-11-25 18:14:12,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 3 states have call successors, (60), 2 states have call predecessors, (60), 1 states have return successors, (57), 3 states have call predecessors, (57), 3 states have call successors, (57) [2021-11-25 18:14:12,292 INFO L276 IsEmpty]: Start isEmpty. Operand 11252 states and 15933 transitions. [2021-11-25 18:14:12,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 606 [2021-11-25 18:14:12,308 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:14:12,309 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 23, 23, 23, 23, 23, 23, 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] [2021-11-25 18:14:12,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 18:14:12,309 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:14:12,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:14:12,311 INFO L85 PathProgramCache]: Analyzing trace with hash -46633801, now seen corresponding path program 1 times [2021-11-25 18:14:12,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:14:12,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393409507] [2021-11-25 18:14:12,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:14:12,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:14:12,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:14:13,052 INFO L134 CoverageAnalysis]: Checked inductivity of 5562 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5551 trivial. 0 not checked. [2021-11-25 18:14:13,052 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:14:13,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393409507] [2021-11-25 18:14:13,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393409507] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:14:13,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:14:13,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 18:14:13,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888258134] [2021-11-25 18:14:13,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:14:13,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 18:14:13,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:14:13,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 18:14:13,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 18:14:13,061 INFO L87 Difference]: Start difference. First operand 11252 states and 15933 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (60), 2 states have call predecessors, (60), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2021-11-25 18:14:19,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:14:19,884 INFO L93 Difference]: Finished difference Result 22414 states and 31731 transitions. [2021-11-25 18:14:19,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:14:19,885 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (60), 2 states have call predecessors, (60), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) Word has length 605 [2021-11-25 18:14:19,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:14:20,101 INFO L225 Difference]: With dead ends: 22414 [2021-11-25 18:14:20,101 INFO L226 Difference]: Without dead ends: 11263 [2021-11-25 18:14:20,149 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 [2021-11-25 18:14:20,150 INFO L933 BasicCegarLoop]: 1563 mSDtfsCounter, 8 mSDsluCounter, 3515 mSDsCounter, 0 mSdLazyCounter, 612 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 4679 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 612 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:14:20,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 4679 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 612 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2021-11-25 18:14:20,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11263 states. [2021-11-25 18:14:20,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11263 to 11254. [2021-11-25 18:14:20,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11254 states, 7391 states have (on average 1.3624678663239074) internal successors, (10070), 7558 states have internal predecessors, (10070), 2912 states have call successors, (2912), 951 states have call predecessors, (2912), 950 states have return successors, (2950), 2888 states have call predecessors, (2950), 2910 states have call successors, (2950) [2021-11-25 18:14:20,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11254 states to 11254 states and 15932 transitions. [2021-11-25 18:14:20,669 INFO L78 Accepts]: Start accepts. Automaton has 11254 states and 15932 transitions. Word has length 605 [2021-11-25 18:14:20,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:14:20,671 INFO L470 AbstractCegarLoop]: Abstraction has 11254 states and 15932 transitions. [2021-11-25 18:14:20,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 2 states have call successors, (60), 2 states have call predecessors, (60), 1 states have return successors, (57), 2 states have call predecessors, (57), 2 states have call successors, (57) [2021-11-25 18:14:20,672 INFO L276 IsEmpty]: Start isEmpty. Operand 11254 states and 15932 transitions. [2021-11-25 18:14:20,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 618 [2021-11-25 18:14:20,686 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:14:20,687 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 23, 23, 23, 23, 23, 23, 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] [2021-11-25 18:14:20,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 18:14:20,688 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:14:20,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:14:20,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1026928469, now seen corresponding path program 1 times [2021-11-25 18:14:20,689 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:14:20,689 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631955202] [2021-11-25 18:14:20,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:14:20,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:14:21,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:14:21,823 INFO L134 CoverageAnalysis]: Checked inductivity of 5562 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5551 trivial. 0 not checked. [2021-11-25 18:14:21,823 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:14:21,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631955202] [2021-11-25 18:14:21,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631955202] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:14:21,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:14:21,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:14:21,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683128516] [2021-11-25 18:14:21,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:14:21,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:14:21,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:14:21,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:14:21,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:14:21,827 INFO L87 Difference]: Start difference. First operand 11254 states and 15932 transitions. Second operand has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 3 states have call successors, (62), 2 states have call predecessors, (62), 1 states have return successors, (58), 3 states have call predecessors, (58), 3 states have call successors, (58) [2021-11-25 18:14:23,749 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:14:27,116 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:14:30,833 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:14:32,894 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:14:36,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:14:36,731 INFO L93 Difference]: Finished difference Result 22436 states and 31753 transitions. [2021-11-25 18:14:36,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:14:36,733 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 3 states have call successors, (62), 2 states have call predecessors, (62), 1 states have return successors, (58), 3 states have call predecessors, (58), 3 states have call successors, (58) Word has length 617 [2021-11-25 18:14:36,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:14:36,801 INFO L225 Difference]: With dead ends: 22436 [2021-11-25 18:14:36,802 INFO L226 Difference]: Without dead ends: 11274 [2021-11-25 18:14:36,845 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 [2021-11-25 18:14:36,845 INFO L933 BasicCegarLoop]: 1565 mSDtfsCounter, 13 mSDsluCounter, 5272 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 2 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 6242 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.6s IncrementalHoareTripleChecker+Time [2021-11-25 18:14:36,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 6242 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 814 Invalid, 2 Unknown, 0 Unchecked, 14.6s Time] [2021-11-25 18:14:36,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11274 states. [2021-11-25 18:14:37,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11274 to 11261. [2021-11-25 18:14:37,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11261 states, 7395 states have (on average 1.3614604462474644) internal successors, (10068), 7564 states have internal predecessors, (10068), 2915 states have call successors, (2915), 951 states have call predecessors, (2915), 950 states have return successors, (2953), 2889 states have call predecessors, (2953), 2913 states have call successors, (2953) [2021-11-25 18:14:37,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11261 states to 11261 states and 15936 transitions. [2021-11-25 18:14:37,493 INFO L78 Accepts]: Start accepts. Automaton has 11261 states and 15936 transitions. Word has length 617 [2021-11-25 18:14:37,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:14:37,495 INFO L470 AbstractCegarLoop]: Abstraction has 11261 states and 15936 transitions. [2021-11-25 18:14:37,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 3 states have call successors, (62), 2 states have call predecessors, (62), 1 states have return successors, (58), 3 states have call predecessors, (58), 3 states have call successors, (58) [2021-11-25 18:14:37,498 INFO L276 IsEmpty]: Start isEmpty. Operand 11261 states and 15936 transitions. [2021-11-25 18:14:37,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 614 [2021-11-25 18:14:37,513 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:14:37,513 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 23, 23, 23, 23, 23, 23, 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] [2021-11-25 18:14:37,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 18:14:37,514 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:14:37,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:14:37,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1625755762, now seen corresponding path program 1 times [2021-11-25 18:14:37,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:14:37,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852239780] [2021-11-25 18:14:37,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:14:37,516 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:14:37,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:14:38,432 INFO L134 CoverageAnalysis]: Checked inductivity of 5562 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5551 trivial. 0 not checked. [2021-11-25 18:14:38,432 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:14:38,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852239780] [2021-11-25 18:14:38,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852239780] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:14:38,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:14:38,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:14:38,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188296268] [2021-11-25 18:14:38,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:14:38,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:14:38,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:14:38,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:14:38,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:14:38,437 INFO L87 Difference]: Start difference. First operand 11261 states and 15936 transitions. Second operand has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 3 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (58), 3 states have call predecessors, (58), 3 states have call successors, (58) [2021-11-25 18:14:40,481 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:14:44,769 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:14:48,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:14:48,630 INFO L93 Difference]: Finished difference Result 22434 states and 31739 transitions. [2021-11-25 18:14:48,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 18:14:48,632 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 3 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (58), 3 states have call predecessors, (58), 3 states have call successors, (58) Word has length 613 [2021-11-25 18:14:48,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:14:48,809 INFO L225 Difference]: With dead ends: 22434 [2021-11-25 18:14:48,809 INFO L226 Difference]: Without dead ends: 11259 [2021-11-25 18:14:48,844 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 [2021-11-25 18:14:48,846 INFO L933 BasicCegarLoop]: 1564 mSDtfsCounter, 13 mSDsluCounter, 5266 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 3 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 6237 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2021-11-25 18:14:48,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 6237 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 809 Invalid, 1 Unknown, 0 Unchecked, 9.8s Time] [2021-11-25 18:14:48,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11259 states. [2021-11-25 18:14:49,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11259 to 11229. [2021-11-25 18:14:49,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11229 states, 7376 states have (on average 1.3619848156182213) internal successors, (10046), 7543 states have internal predecessors, (10046), 2907 states have call successors, (2907), 946 states have call predecessors, (2907), 945 states have return successors, (2945), 2883 states have call predecessors, (2945), 2905 states have call successors, (2945) [2021-11-25 18:14:49,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11229 states to 11229 states and 15898 transitions. [2021-11-25 18:14:49,348 INFO L78 Accepts]: Start accepts. Automaton has 11229 states and 15898 transitions. Word has length 613 [2021-11-25 18:14:49,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:14:49,350 INFO L470 AbstractCegarLoop]: Abstraction has 11229 states and 15898 transitions. [2021-11-25 18:14:49,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.8) internal successors, (119), 5 states have internal predecessors, (119), 3 states have call successors, (61), 2 states have call predecessors, (61), 1 states have return successors, (58), 3 states have call predecessors, (58), 3 states have call successors, (58) [2021-11-25 18:14:49,350 INFO L276 IsEmpty]: Start isEmpty. Operand 11229 states and 15898 transitions. [2021-11-25 18:14:49,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 618 [2021-11-25 18:14:49,366 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:14:49,367 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 23, 23, 23, 23, 23, 23, 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] [2021-11-25 18:14:49,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 18:14:49,368 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:14:49,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:14:49,369 INFO L85 PathProgramCache]: Analyzing trace with hash -681865092, now seen corresponding path program 1 times [2021-11-25 18:14:49,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:14:49,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14855991] [2021-11-25 18:14:49,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:14:49,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:14:49,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:14:50,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5564 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5553 trivial. 0 not checked. [2021-11-25 18:14:50,176 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:14:50,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14855991] [2021-11-25 18:14:50,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14855991] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 18:14:50,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 18:14:50,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 18:14:50,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901296792] [2021-11-25 18:14:50,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 18:14:50,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 18:14:50,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 18:14:50,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 18:14:50,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-25 18:14:50,180 INFO L87 Difference]: Start difference. First operand 11229 states and 15898 transitions. Second operand has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 4 states have call successors, (62), 2 states have call predecessors, (62), 1 states have return successors, (59), 4 states have call predecessors, (59), 4 states have call successors, (59) [2021-11-25 18:14:51,596 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:14:53,912 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:14:56,908 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:14:58,782 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-25 18:15:01,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 18:15:01,136 INFO L93 Difference]: Finished difference Result 22534 states and 31938 transitions. [2021-11-25 18:15:01,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-25 18:15:01,137 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 4 states have call successors, (62), 2 states have call predecessors, (62), 1 states have return successors, (59), 4 states have call predecessors, (59), 4 states have call successors, (59) Word has length 617 [2021-11-25 18:15:01,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 18:15:01,201 INFO L225 Difference]: With dead ends: 22534 [2021-11-25 18:15:01,201 INFO L226 Difference]: Without dead ends: 11412 [2021-11-25 18:15:01,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-25 18:15:01,236 INFO L933 BasicCegarLoop]: 1760 mSDtfsCounter, 1925 mSDsluCounter, 3684 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 67 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1925 SdHoareTripleChecker+Valid, 5044 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.5s IncrementalHoareTripleChecker+Time [2021-11-25 18:15:01,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1925 Valid, 5044 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 717 Invalid, 1 Unknown, 0 Unchecked, 10.5s Time] [2021-11-25 18:15:01,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11412 states. [2021-11-25 18:15:01,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11412 to 11235. [2021-11-25 18:15:01,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11235 states, 7382 states have (on average 1.3612842048225413) internal successors, (10049), 7549 states have internal predecessors, (10049), 2907 states have call successors, (2907), 946 states have call predecessors, (2907), 945 states have return successors, (2945), 2883 states have call predecessors, (2945), 2905 states have call successors, (2945) [2021-11-25 18:15:01,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11235 states to 11235 states and 15901 transitions. [2021-11-25 18:15:01,916 INFO L78 Accepts]: Start accepts. Automaton has 11235 states and 15901 transitions. Word has length 617 [2021-11-25 18:15:01,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 18:15:01,917 INFO L470 AbstractCegarLoop]: Abstraction has 11235 states and 15901 transitions. [2021-11-25 18:15:01,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.0) internal successors, (120), 5 states have internal predecessors, (120), 4 states have call successors, (62), 2 states have call predecessors, (62), 1 states have return successors, (59), 4 states have call predecessors, (59), 4 states have call successors, (59) [2021-11-25 18:15:01,918 INFO L276 IsEmpty]: Start isEmpty. Operand 11235 states and 15901 transitions. [2021-11-25 18:15:01,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 638 [2021-11-25 18:15:01,939 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 18:15:01,940 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 23, 23, 23, 23, 23, 23, 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] [2021-11-25 18:15:01,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 18:15:01,940 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 18:15:01,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 18:15:01,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1845097853, now seen corresponding path program 1 times [2021-11-25 18:15:01,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 18:15:01,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034023371] [2021-11-25 18:15:01,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:15:01,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 18:15:02,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:15:03,093 INFO L134 CoverageAnalysis]: Checked inductivity of 5569 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 5557 trivial. 0 not checked. [2021-11-25 18:15:03,094 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 18:15:03,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034023371] [2021-11-25 18:15:03,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034023371] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 18:15:03,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951161884] [2021-11-25 18:15:03,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 18:15:03,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 18:15:03,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfd99cb-9c5a-4ec9-aeaa-0fb98f710e85/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 18:15:03,101 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfd99cb-9c5a-4ec9-aeaa-0fb98f710e85/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 18:15:03,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_fdfd99cb-9c5a-4ec9-aeaa-0fb98f710e85/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 18:15:05,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 18:15:05,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 6140 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 18:15:05,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 18:15:07,412 INFO L134 CoverageAnalysis]: Checked inductivity of 5569 backedges. 537 proven. 1 refuted. 0 times theorem prover too weak. 5031 trivial. 0 not checked. [2021-11-25 18:15:07,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 18:15:09,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5569 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 5557 trivial. 0 not checked. [2021-11-25 18:15:09,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951161884] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 18:15:09,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1004750604] [2021-11-25 18:15:10,011 INFO L159 IcfgInterpreter]: Started Sifa with 196 locations of interest [2021-11-25 18:15:10,011 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 18:15:10,070 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 18:15:10,081 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 18:15:10,082 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 18:15:13,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 297 treesize of output 254 [2021-11-25 18:15:14,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,235 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,237 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,238 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:14,285 INFO L244 Elim1Store]: Index analysis took 121 ms [2021-11-25 18:15:14,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 77 select indices, 77 select index equivalence classes, 249 disjoint index pairs (out of 2926 index pairs), introduced 77 new quantified variables, introduced 0 case distinctions, treesize of input 592 treesize of output 808 [2021-11-25 18:15:16,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:16,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:15:17,269 INFO L244 Elim1Store]: Index analysis took 2335 ms [2021-11-25 18:22:34,959 WARN L227 SmtUtils]: Spent 7.29m on a formula simplification. DAG size of input: 5660 DAG size of output: 1923 (called from [L 351] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2021-11-25 18:22:34,973 INFO L354 Elim1Store]: treesize reduction 70705, result has 6.7 percent of original size [2021-11-25 18:22:34,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 64 select indices, 64 select index equivalence classes, 2062 disjoint index pairs (out of 2016 index pairs), introduced 64 new quantified variables, introduced 85 case distinctions, treesize of input 393 treesize of output 5264 [2021-11-25 18:22:41,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 293 treesize of output 250 [2021-11-25 18:23:04,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:23:15,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:23:26,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:23:29,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:23:39,048 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:23:44,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:23:52,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:23:57,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:24:02,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:24:10,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:24:14,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:24:21,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:24:23,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:24:27,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:24:29,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:24:31,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:24:37,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:24:40,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:24:42,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:24:42,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:24:42,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:24:42,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:24:42,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-25 18:24:45,008 INFO L244 Elim1Store]: Index analysis took 104274 ms