./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y --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 Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 9f2fac8642c25f1335350a2814ff7cf3c4ea0fb7f4feaed63baec564397e8f24 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 17:54:29,149 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 17:54:29,152 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 17:54:29,223 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 17:54:29,225 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 17:54:29,231 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 17:54:29,238 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 17:54:29,240 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 17:54:29,242 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 17:54:29,245 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 17:54:29,246 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 17:54:29,248 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 17:54:29,250 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 17:54:29,257 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 17:54:29,259 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 17:54:29,262 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 17:54:29,263 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 17:54:29,265 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 17:54:29,267 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 17:54:29,273 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 17:54:29,280 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 17:54:29,281 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 17:54:29,283 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 17:54:29,284 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 17:54:29,289 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 17:54:29,292 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 17:54:29,292 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 17:54:29,294 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 17:54:29,295 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 17:54:29,297 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 17:54:29,297 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 17:54:29,299 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 17:54:29,301 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 17:54:29,303 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 17:54:29,304 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 17:54:29,305 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 17:54:29,306 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 17:54:29,306 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 17:54:29,306 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 17:54:29,307 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 17:54:29,308 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 17:54:29,309 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-13 17:54:29,361 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 17:54:29,362 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 17:54:29,362 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 17:54:29,363 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 17:54:29,364 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 17:54:29,364 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 17:54:29,365 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 17:54:29,365 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 17:54:29,365 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 17:54:29,366 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 17:54:29,367 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 17:54:29,368 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 17:54:29,368 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 17:54:29,368 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 17:54:29,368 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 17:54:29,369 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 17:54:29,369 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 17:54:29,369 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 17:54:29,369 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 17:54:29,370 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 17:54:29,370 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 17:54:29,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:54:29,370 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 17:54:29,371 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 17:54:29,371 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 17:54:29,371 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 17:54:29,371 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 17:54:29,372 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 17:54:29,372 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 17:54:29,374 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 17:54:29,375 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 17:54:29,375 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9f2fac8642c25f1335350a2814ff7cf3c4ea0fb7f4feaed63baec564397e8f24 [2021-11-13 17:54:29,663 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 17:54:29,692 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 17:54:29,696 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 17:54:29,697 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 17:54:29,698 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 17:54:29,699 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i [2021-11-13 17:54:29,780 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/data/07468e57d/4f08a36b03c54d768778c1358175e673/FLAG0c800d116 [2021-11-13 17:54:30,759 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 17:54:30,765 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i [2021-11-13 17:54:30,836 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/data/07468e57d/4f08a36b03c54d768778c1358175e673/FLAG0c800d116 [2021-11-13 17:54:31,113 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/data/07468e57d/4f08a36b03c54d768778c1358175e673 [2021-11-13 17:54:31,115 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 17:54:31,117 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 17:54:31,123 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 17:54:31,123 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 17:54:31,128 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 17:54:31,129 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:54:31" (1/1) ... [2021-11-13 17:54:31,130 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67fa2eed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:54:31, skipping insertion in model container [2021-11-13 17:54:31,131 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:54:31" (1/1) ... [2021-11-13 17:54:31,139 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 17:54:31,306 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 17:54:32,601 WARN L228 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_8ef001b1-94e2-4ce5-a149-9818a51e6261/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i[202214,202227] [2021-11-13 17:54:33,097 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:54:33,127 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 17:54:33,364 WARN L228 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_8ef001b1-94e2-4ce5-a149-9818a51e6261/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i[202214,202227] [2021-11-13 17:54:33,486 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:54:33,642 INFO L208 MainTranslator]: Completed translation [2021-11-13 17:54:33,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:54:33 WrapperNode [2021-11-13 17:54:33,643 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 17:54:33,644 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 17:54:33,645 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 17:54:33,645 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 17:54:33,654 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:54:33" (1/1) ... [2021-11-13 17:54:33,719 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:54:33" (1/1) ... [2021-11-13 17:54:33,912 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 17:54:33,913 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 17:54:33,913 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 17:54:33,913 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 17:54:33,924 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:54:33" (1/1) ... [2021-11-13 17:54:33,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:54:33" (1/1) ... [2021-11-13 17:54:33,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:54:33" (1/1) ... [2021-11-13 17:54:33,977 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:54:33" (1/1) ... [2021-11-13 17:54:34,119 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:54:33" (1/1) ... [2021-11-13 17:54:34,151 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:54:33" (1/1) ... [2021-11-13 17:54:34,188 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:54:33" (1/1) ... [2021-11-13 17:54:34,268 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 17:54:34,270 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 17:54:34,270 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 17:54:34,270 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 17:54:34,272 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:54:33" (1/1) ... [2021-11-13 17:54:34,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:54:34,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:54:34,335 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 17:54:34,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 17:54:34,397 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2021-11-13 17:54:34,398 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2021-11-13 17:54:34,398 INFO L130 BoogieDeclarations]: Found specification of procedure mwifiex_unregister_dev [2021-11-13 17:54:34,398 INFO L138 BoogieDeclarations]: Found implementation of procedure mwifiex_unregister_dev [2021-11-13 17:54:34,399 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_2 [2021-11-13 17:54:34,399 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_2 [2021-11-13 17:54:34,399 INFO L130 BoogieDeclarations]: Found specification of procedure skb_copy_from_linear_data [2021-11-13 17:54:34,399 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_copy_from_linear_data [2021-11-13 17:54:34,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-13 17:54:34,400 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_3 [2021-11-13 17:54:34,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_3 [2021-11-13 17:54:34,400 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-13 17:54:34,400 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-13 17:54:34,401 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2021-11-13 17:54:34,401 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2021-11-13 17:54:34,401 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-13 17:54:34,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-13 17:54:34,402 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 17:54:34,402 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2021-11-13 17:54:34,402 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2021-11-13 17:54:34,402 INFO L130 BoogieDeclarations]: Found specification of procedure skb_push [2021-11-13 17:54:34,402 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_push [2021-11-13 17:54:34,403 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2021-11-13 17:54:34,403 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2021-11-13 17:54:34,403 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-13 17:54:34,403 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-13 17:54:34,404 INFO L130 BoogieDeclarations]: Found specification of procedure mwifiex_usb_disconnect [2021-11-13 17:54:34,404 INFO L138 BoogieDeclarations]: Found implementation of procedure mwifiex_usb_disconnect [2021-11-13 17:54:34,404 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-13 17:54:34,404 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-13 17:54:34,404 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-13 17:54:34,405 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-13 17:54:34,406 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2021-11-13 17:54:34,406 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2021-11-13 17:54:34,406 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-13 17:54:34,406 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-13 17:54:34,407 INFO L130 BoogieDeclarations]: Found specification of procedure mwifiex_get_priv [2021-11-13 17:54:34,407 INFO L138 BoogieDeclarations]: Found implementation of procedure mwifiex_get_priv [2021-11-13 17:54:34,407 INFO L130 BoogieDeclarations]: Found specification of procedure mwifiex_usb_submit_rx_urb [2021-11-13 17:54:34,407 INFO L138 BoogieDeclarations]: Found implementation of procedure mwifiex_usb_submit_rx_urb [2021-11-13 17:54:34,408 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-13 17:54:34,408 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-13 17:54:34,408 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 17:54:34,409 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-13 17:54:34,409 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-13 17:54:34,409 INFO L130 BoogieDeclarations]: Found specification of procedure mwifiex_usb_rx_complete [2021-11-13 17:54:34,410 INFO L138 BoogieDeclarations]: Found implementation of procedure mwifiex_usb_rx_complete [2021-11-13 17:54:34,410 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_in [2021-11-13 17:54:34,410 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_in [2021-11-13 17:54:34,410 INFO L130 BoogieDeclarations]: Found specification of procedure dev_alloc_skb [2021-11-13 17:54:34,411 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_alloc_skb [2021-11-13 17:54:34,411 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-13 17:54:34,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-13 17:54:34,412 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2021-11-13 17:54:34,412 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2021-11-13 17:54:34,412 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-13 17:54:34,413 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-13 17:54:34,413 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-13 17:54:34,415 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-13 17:54:34,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 17:54:34,415 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2021-11-13 17:54:34,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2021-11-13 17:54:34,416 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2021-11-13 17:54:34,416 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2021-11-13 17:54:34,416 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2021-11-13 17:54:34,416 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2021-11-13 17:54:34,416 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-13 17:54:34,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-13 17:54:34,417 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 17:54:34,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 17:54:34,418 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-13 17:54:34,418 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-13 17:54:34,418 INFO L130 BoogieDeclarations]: Found specification of procedure mwifiex_usb_cmd_event_complete [2021-11-13 17:54:34,419 INFO L138 BoogieDeclarations]: Found implementation of procedure mwifiex_usb_cmd_event_complete [2021-11-13 17:54:34,420 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_8 [2021-11-13 17:54:34,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_8 [2021-11-13 17:54:34,420 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 17:54:34,420 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2021-11-13 17:54:34,421 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2021-11-13 17:54:34,421 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_num [2021-11-13 17:54:34,421 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_num [2021-11-13 17:54:34,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 17:54:34,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 17:54:34,422 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_get_intfdata_10 [2021-11-13 17:54:34,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_get_intfdata_10 [2021-11-13 17:54:34,422 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-13 17:54:34,422 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-13 17:54:34,422 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2021-11-13 17:54:34,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2021-11-13 17:54:34,423 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 17:54:34,423 INFO L130 BoogieDeclarations]: Found specification of procedure mwifiex_usb_resume [2021-11-13 17:54:34,424 INFO L138 BoogieDeclarations]: Found implementation of procedure mwifiex_usb_resume [2021-11-13 17:54:34,424 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work [2021-11-13 17:54:34,424 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work [2021-11-13 17:54:34,425 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2021-11-13 17:54:34,425 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2021-11-13 17:54:34,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-13 17:54:34,426 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u8 [2021-11-13 17:54:34,426 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-13 17:54:34,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-13 17:54:34,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 17:54:34,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 17:54:34,428 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_out [2021-11-13 17:54:34,428 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_out [2021-11-13 17:54:35,703 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-13 17:54:36,637 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2021-11-13 17:54:47,411 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 17:54:47,411 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 17:54:47,416 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:54:47 BoogieIcfgContainer [2021-11-13 17:54:47,416 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 17:54:47,418 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 17:54:47,418 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 17:54:47,423 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 17:54:47,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 05:54:31" (1/3) ... [2021-11-13 17:54:47,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47742610 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:54:47, skipping insertion in model container [2021-11-13 17:54:47,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:54:33" (2/3) ... [2021-11-13 17:54:47,425 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47742610 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:54:47, skipping insertion in model container [2021-11-13 17:54:47,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:54:47" (3/3) ... [2021-11-13 17:54:47,426 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i [2021-11-13 17:54:47,433 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 17:54:47,433 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 17:54:47,498 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 17:54:47,506 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=PETRI_NET, 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 [2021-11-13 17:54:47,507 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 17:54:47,556 INFO L276 IsEmpty]: Start isEmpty. Operand has 855 states, 631 states have (on average 1.3851030110935023) internal successors, (874), 657 states have internal predecessors, (874), 180 states have call successors, (180), 44 states have call predecessors, (180), 42 states have return successors, (174), 166 states have call predecessors, (174), 174 states have call successors, (174) [2021-11-13 17:54:47,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-13 17:54:47,580 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:54:47,582 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:54:47,583 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:54:47,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:54:47,595 INFO L85 PathProgramCache]: Analyzing trace with hash -967497407, now seen corresponding path program 1 times [2021-11-13 17:54:47,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:54:47,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834278539] [2021-11-13 17:54:47,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:54:47,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:54:48,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:48,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:54:48,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:48,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:54:48,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:48,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 17:54:48,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:48,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 17:54:48,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:54:48,673 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 17:54:48,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:54:48,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834278539] [2021-11-13 17:54:48,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834278539] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:54:48,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:54:48,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:54:48,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022360056] [2021-11-13 17:54:48,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:54:48,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:54:48,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:54:48,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:54:48,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:54:48,733 INFO L87 Difference]: Start difference. First operand has 855 states, 631 states have (on average 1.3851030110935023) internal successors, (874), 657 states have internal predecessors, (874), 180 states have call successors, (180), 44 states have call predecessors, (180), 42 states have return successors, (174), 166 states have call predecessors, (174), 174 states have call successors, (174) Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 17:54:50,816 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:54:52,928 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:54:55,050 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:54:57,701 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:54:59,719 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:55:05,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:55:05,793 INFO L93 Difference]: Finished difference Result 2754 states and 4123 transitions. [2021-11-13 17:55:05,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:55:05,797 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 44 [2021-11-13 17:55:05,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:55:05,852 INFO L225 Difference]: With dead ends: 2754 [2021-11-13 17:55:05,852 INFO L226 Difference]: Without dead ends: 1880 [2021-11-13 17:55:05,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:55:05,873 INFO L933 BasicCegarLoop]: 1335 mSDtfsCounter, 1892 mSDsluCounter, 2186 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 1010 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15402.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2039 SdHoareTripleChecker+Valid, 3521 SdHoareTripleChecker+Invalid, 2435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 70.16ms SdHoareTripleChecker+Time, 1010 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16601.85ms IncrementalHoareTripleChecker+Time [2021-11-13 17:55:05,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2039 Valid, 3521 Invalid, 2435 Unknown, 0 Unchecked, 70.16ms Time], IncrementalHoareTripleChecker [1010 Valid, 1420 Invalid, 5 Unknown, 0 Unchecked, 16601.85ms Time] [2021-11-13 17:55:05,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1880 states. [2021-11-13 17:55:06,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1880 to 1612. [2021-11-13 17:55:06,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1612 states, 1197 states have (on average 1.3751044277360067) internal successors, (1646), 1229 states have internal predecessors, (1646), 332 states have call successors, (332), 83 states have call predecessors, (332), 82 states have return successors, (327), 311 states have call predecessors, (327), 327 states have call successors, (327) [2021-11-13 17:55:06,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1612 states to 1612 states and 2305 transitions. [2021-11-13 17:55:06,133 INFO L78 Accepts]: Start accepts. Automaton has 1612 states and 2305 transitions. Word has length 44 [2021-11-13 17:55:06,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:55:06,134 INFO L470 AbstractCegarLoop]: Abstraction has 1612 states and 2305 transitions. [2021-11-13 17:55:06,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 3 states have internal predecessors, (29), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 17:55:06,135 INFO L276 IsEmpty]: Start isEmpty. Operand 1612 states and 2305 transitions. [2021-11-13 17:55:06,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-13 17:55:06,151 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:55:06,152 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:55:06,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 17:55:06,152 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:55:06,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:55:06,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1415687837, now seen corresponding path program 1 times [2021-11-13 17:55:06,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:55:06,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380389640] [2021-11-13 17:55:06,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:55:06,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:55:06,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:07,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:55:07,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:07,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:55:07,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:07,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 17:55:07,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:07,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 17:55:07,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:07,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-13 17:55:07,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:07,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 17:55:07,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:07,259 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 17:55:07,260 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:55:07,260 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380389640] [2021-11-13 17:55:07,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380389640] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:55:07,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:55:07,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:55:07,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647154480] [2021-11-13 17:55:07,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:55:07,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:55:07,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:55:07,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:55:07,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:55:07,268 INFO L87 Difference]: Start difference. First operand 1612 states and 2305 transitions. Second operand has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-13 17:55:09,321 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:55:11,493 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:55:13,960 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:55:16,004 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:55:20,157 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:55:22,204 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:55:27,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:55:27,453 INFO L93 Difference]: Finished difference Result 5349 states and 7945 transitions. [2021-11-13 17:55:27,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:55:27,454 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 61 [2021-11-13 17:55:27,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:55:27,488 INFO L225 Difference]: With dead ends: 5349 [2021-11-13 17:55:27,488 INFO L226 Difference]: Without dead ends: 3748 [2021-11-13 17:55:27,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:55:27,504 INFO L933 BasicCegarLoop]: 1366 mSDtfsCounter, 1948 mSDsluCounter, 2248 mSDsCounter, 0 mSdLazyCounter, 1438 mSolverCounterSat, 1008 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18470.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2077 SdHoareTripleChecker+Valid, 3614 SdHoareTripleChecker+Invalid, 2452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 56.56ms SdHoareTripleChecker+Time, 1008 IncrementalHoareTripleChecker+Valid, 1438 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19715.79ms IncrementalHoareTripleChecker+Time [2021-11-13 17:55:27,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2077 Valid, 3614 Invalid, 2452 Unknown, 0 Unchecked, 56.56ms Time], IncrementalHoareTripleChecker [1008 Valid, 1438 Invalid, 6 Unknown, 0 Unchecked, 19715.79ms Time] [2021-11-13 17:55:27,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3748 states. [2021-11-13 17:55:27,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3748 to 3286. [2021-11-13 17:55:27,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3286 states, 2434 states have (on average 1.3697617091207888) internal successors, (3334), 2504 states have internal predecessors, (3334), 671 states have call successors, (671), 165 states have call predecessors, (671), 180 states have return successors, (762), 642 states have call predecessors, (762), 666 states have call successors, (762) [2021-11-13 17:55:27,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3286 states to 3286 states and 4767 transitions. [2021-11-13 17:55:27,715 INFO L78 Accepts]: Start accepts. Automaton has 3286 states and 4767 transitions. Word has length 61 [2021-11-13 17:55:27,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:55:27,716 INFO L470 AbstractCegarLoop]: Abstraction has 3286 states and 4767 transitions. [2021-11-13 17:55:27,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.8) internal successors, (39), 3 states have internal predecessors, (39), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-13 17:55:27,717 INFO L276 IsEmpty]: Start isEmpty. Operand 3286 states and 4767 transitions. [2021-11-13 17:55:27,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-13 17:55:27,721 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:55:27,722 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:55:27,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 17:55:27,723 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:55:27,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:55:27,727 INFO L85 PathProgramCache]: Analyzing trace with hash -937016713, now seen corresponding path program 1 times [2021-11-13 17:55:27,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:55:27,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144456173] [2021-11-13 17:55:27,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:55:27,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:55:28,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:28,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:55:28,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:28,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:55:28,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:28,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 17:55:28,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:28,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 17:55:28,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:28,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-13 17:55:28,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:28,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 17:55:28,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:28,425 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 17:55:28,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:55:28,426 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144456173] [2021-11-13 17:55:28,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144456173] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:55:28,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:55:28,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:55:28,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077014958] [2021-11-13 17:55:28,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:55:28,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:55:28,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:55:28,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:55:28,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:55:28,431 INFO L87 Difference]: Start difference. First operand 3286 states and 4767 transitions. Second operand has 5 states, 5 states have (on average 8.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-13 17:55:30,508 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:55:32,633 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:55:35,118 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:55:37,200 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:55:42,515 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:55:44,547 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:55:47,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:55:47,924 INFO L93 Difference]: Finished difference Result 10731 states and 16197 transitions. [2021-11-13 17:55:47,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:55:47,925 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 62 [2021-11-13 17:55:47,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:55:48,015 INFO L225 Difference]: With dead ends: 10731 [2021-11-13 17:55:48,015 INFO L226 Difference]: Without dead ends: 7456 [2021-11-13 17:55:48,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:55:48,040 INFO L933 BasicCegarLoop]: 1303 mSDtfsCounter, 2006 mSDsluCounter, 2142 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 1034 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17751.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2146 SdHoareTripleChecker+Valid, 3445 SdHoareTripleChecker+Invalid, 2442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 47.91ms SdHoareTripleChecker+Time, 1034 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18905.07ms IncrementalHoareTripleChecker+Time [2021-11-13 17:55:48,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2146 Valid, 3445 Invalid, 2442 Unknown, 0 Unchecked, 47.91ms Time], IncrementalHoareTripleChecker [1034 Valid, 1402 Invalid, 6 Unknown, 0 Unchecked, 18905.07ms Time] [2021-11-13 17:55:48,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7456 states. [2021-11-13 17:55:48,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7456 to 6627. [2021-11-13 17:55:48,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6627 states, 4901 states have (on average 1.3650275453988983) internal successors, (6690), 5047 states have internal predecessors, (6690), 1349 states have call successors, (1349), 329 states have call predecessors, (1349), 376 states have return successors, (1702), 1304 states have call predecessors, (1702), 1344 states have call successors, (1702) [2021-11-13 17:55:48,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6627 states to 6627 states and 9741 transitions. [2021-11-13 17:55:48,541 INFO L78 Accepts]: Start accepts. Automaton has 6627 states and 9741 transitions. Word has length 62 [2021-11-13 17:55:48,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:55:48,544 INFO L470 AbstractCegarLoop]: Abstraction has 6627 states and 9741 transitions. [2021-11-13 17:55:48,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.0) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-13 17:55:48,544 INFO L276 IsEmpty]: Start isEmpty. Operand 6627 states and 9741 transitions. [2021-11-13 17:55:48,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-13 17:55:48,547 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:55:48,547 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:55:48,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 17:55:48,548 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:55:48,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:55:48,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1016891110, now seen corresponding path program 1 times [2021-11-13 17:55:48,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:55:48,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304325181] [2021-11-13 17:55:48,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:55:48,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:55:48,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:48,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:55:48,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:48,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:55:48,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:48,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 17:55:48,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:48,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 17:55:48,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:48,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-13 17:55:48,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:48,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 17:55:49,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:55:49,021 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 17:55:49,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:55:49,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304325181] [2021-11-13 17:55:49,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304325181] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:55:49,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:55:49,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:55:49,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603689941] [2021-11-13 17:55:49,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:55:49,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:55:49,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:55:49,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:55:49,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:55:49,024 INFO L87 Difference]: Start difference. First operand 6627 states and 9741 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-13 17:55:51,096 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:55:53,258 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:55:55,668 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:55:57,723 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:56:02,763 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:56:04,801 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:56:07,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:56:07,597 INFO L93 Difference]: Finished difference Result 7454 states and 11168 transitions. [2021-11-13 17:56:07,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:56:07,598 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 63 [2021-11-13 17:56:07,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:56:07,665 INFO L225 Difference]: With dead ends: 7454 [2021-11-13 17:56:07,665 INFO L226 Difference]: Without dead ends: 7451 [2021-11-13 17:56:07,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:56:07,671 INFO L933 BasicCegarLoop]: 1306 mSDtfsCounter, 2003 mSDsluCounter, 2147 mSDsCounter, 0 mSdLazyCounter, 1392 mSolverCounterSat, 1027 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16992.29ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2141 SdHoareTripleChecker+Valid, 3453 SdHoareTripleChecker+Invalid, 2425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 34.01ms SdHoareTripleChecker+Time, 1027 IncrementalHoareTripleChecker+Valid, 1392 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18115.60ms IncrementalHoareTripleChecker+Time [2021-11-13 17:56:07,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2141 Valid, 3453 Invalid, 2425 Unknown, 0 Unchecked, 34.01ms Time], IncrementalHoareTripleChecker [1027 Valid, 1392 Invalid, 6 Unknown, 0 Unchecked, 18115.60ms Time] [2021-11-13 17:56:07,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7451 states. [2021-11-13 17:56:08,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7451 to 6628. [2021-11-13 17:56:08,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6628 states, 4902 states have (on average 1.364953080375357) internal successors, (6691), 5048 states have internal predecessors, (6691), 1349 states have call successors, (1349), 329 states have call predecessors, (1349), 376 states have return successors, (1702), 1304 states have call predecessors, (1702), 1344 states have call successors, (1702) [2021-11-13 17:56:08,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6628 states to 6628 states and 9742 transitions. [2021-11-13 17:56:08,150 INFO L78 Accepts]: Start accepts. Automaton has 6628 states and 9742 transitions. Word has length 63 [2021-11-13 17:56:08,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:56:08,154 INFO L470 AbstractCegarLoop]: Abstraction has 6628 states and 9742 transitions. [2021-11-13 17:56:08,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-13 17:56:08,156 INFO L276 IsEmpty]: Start isEmpty. Operand 6628 states and 9742 transitions. [2021-11-13 17:56:08,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-13 17:56:08,161 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:56:08,162 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:56:08,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 17:56:08,162 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:56:08,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:56:08,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1458496346, now seen corresponding path program 1 times [2021-11-13 17:56:08,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:56:08,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189027912] [2021-11-13 17:56:08,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:56:08,168 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:56:08,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:08,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:56:08,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:08,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:56:08,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:08,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 17:56:08,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:08,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 17:56:08,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:08,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-13 17:56:08,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:08,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 17:56:08,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:08,674 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 17:56:08,674 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:56:08,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189027912] [2021-11-13 17:56:08,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189027912] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:56:08,675 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:56:08,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:56:08,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296810539] [2021-11-13 17:56:08,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:56:08,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:56:08,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:56:08,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:56:08,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:56:08,679 INFO L87 Difference]: Start difference. First operand 6628 states and 9742 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-13 17:56:10,746 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:56:12,903 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:56:15,299 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:56:17,342 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:56:21,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:56:21,306 INFO L93 Difference]: Finished difference Result 7450 states and 11164 transitions. [2021-11-13 17:56:21,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 17:56:21,307 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 64 [2021-11-13 17:56:21,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:56:21,383 INFO L225 Difference]: With dead ends: 7450 [2021-11-13 17:56:21,383 INFO L226 Difference]: Without dead ends: 7447 [2021-11-13 17:56:21,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:56:21,390 INFO L933 BasicCegarLoop]: 1128 mSDtfsCounter, 1541 mSDsluCounter, 1090 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 574 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11466.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1680 SdHoareTripleChecker+Valid, 2218 SdHoareTripleChecker+Invalid, 1369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 19.17ms SdHoareTripleChecker+Time, 574 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12326.93ms IncrementalHoareTripleChecker+Time [2021-11-13 17:56:21,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1680 Valid, 2218 Invalid, 1369 Unknown, 0 Unchecked, 19.17ms Time], IncrementalHoareTripleChecker [574 Valid, 791 Invalid, 4 Unknown, 0 Unchecked, 12326.93ms Time] [2021-11-13 17:56:21,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7447 states. [2021-11-13 17:56:21,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7447 to 6627. [2021-11-13 17:56:21,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6627 states, 4902 states have (on average 1.364749082007344) internal successors, (6690), 5047 states have internal predecessors, (6690), 1348 states have call successors, (1348), 329 states have call predecessors, (1348), 376 states have return successors, (1702), 1304 states have call predecessors, (1702), 1344 states have call successors, (1702) [2021-11-13 17:56:21,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6627 states to 6627 states and 9740 transitions. [2021-11-13 17:56:21,904 INFO L78 Accepts]: Start accepts. Automaton has 6627 states and 9740 transitions. Word has length 64 [2021-11-13 17:56:21,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:56:21,905 INFO L470 AbstractCegarLoop]: Abstraction has 6627 states and 9740 transitions. [2021-11-13 17:56:21,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 3 states have internal predecessors, (42), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-13 17:56:21,906 INFO L276 IsEmpty]: Start isEmpty. Operand 6627 states and 9740 transitions. [2021-11-13 17:56:21,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-13 17:56:21,909 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:56:21,909 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:56:21,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 17:56:21,910 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:56:21,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:56:21,910 INFO L85 PathProgramCache]: Analyzing trace with hash -2031605655, now seen corresponding path program 1 times [2021-11-13 17:56:21,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:56:21,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854277182] [2021-11-13 17:56:21,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:56:21,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:56:22,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:22,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:56:22,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:22,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:56:22,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:22,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 17:56:22,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:22,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 17:56:22,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:22,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-13 17:56:22,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:22,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 17:56:22,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:22,346 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 17:56:22,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:56:22,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854277182] [2021-11-13 17:56:22,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854277182] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:56:22,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:56:22,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:56:22,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457107234] [2021-11-13 17:56:22,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:56:22,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:56:22,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:56:22,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:56:22,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:56:22,349 INFO L87 Difference]: Start difference. First operand 6627 states and 9740 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-13 17:56:24,415 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:56:26,623 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:56:28,995 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:56:31,044 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:56:35,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:56:35,005 INFO L93 Difference]: Finished difference Result 7449 states and 11162 transitions. [2021-11-13 17:56:35,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 17:56:35,006 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 65 [2021-11-13 17:56:35,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:56:35,053 INFO L225 Difference]: With dead ends: 7449 [2021-11-13 17:56:35,053 INFO L226 Difference]: Without dead ends: 7417 [2021-11-13 17:56:35,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:56:35,064 INFO L933 BasicCegarLoop]: 1125 mSDtfsCounter, 1537 mSDsluCounter, 1088 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 572 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11498.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1679 SdHoareTripleChecker+Valid, 2213 SdHoareTripleChecker+Invalid, 1361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.71ms SdHoareTripleChecker+Time, 572 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12379.18ms IncrementalHoareTripleChecker+Time [2021-11-13 17:56:35,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1679 Valid, 2213 Invalid, 1361 Unknown, 0 Unchecked, 16.71ms Time], IncrementalHoareTripleChecker [572 Valid, 785 Invalid, 4 Unknown, 0 Unchecked, 12379.18ms Time] [2021-11-13 17:56:35,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7417 states. [2021-11-13 17:56:35,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7417 to 6597. [2021-11-13 17:56:35,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6597 states, 4875 states have (on average 1.3645128205128205) internal successors, (6652), 5019 states have internal predecessors, (6652), 1345 states have call successors, (1345), 329 states have call predecessors, (1345), 376 states have return successors, (1696), 1302 states have call predecessors, (1696), 1342 states have call successors, (1696) [2021-11-13 17:56:35,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6597 states to 6597 states and 9693 transitions. [2021-11-13 17:56:35,602 INFO L78 Accepts]: Start accepts. Automaton has 6597 states and 9693 transitions. Word has length 65 [2021-11-13 17:56:35,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:56:35,604 INFO L470 AbstractCegarLoop]: Abstraction has 6597 states and 9693 transitions. [2021-11-13 17:56:35,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 3 states have internal predecessors, (43), 2 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-11-13 17:56:35,604 INFO L276 IsEmpty]: Start isEmpty. Operand 6597 states and 9693 transitions. [2021-11-13 17:56:35,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-13 17:56:35,612 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:56:35,612 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2021-11-13 17:56:35,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 17:56:35,613 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:56:35,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:56:35,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1428627121, now seen corresponding path program 1 times [2021-11-13 17:56:35,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:56:35,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631325268] [2021-11-13 17:56:35,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:56:35,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:56:35,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:35,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:56:35,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:35,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:56:35,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:35,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 17:56:35,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:35,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 17:56:35,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:35,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-11-13 17:56:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:35,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:56:35,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:36,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:56:36,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:36,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-13 17:56:36,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:36,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2021-11-13 17:56:36,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:36,043 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-13 17:56:36,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:56:36,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631325268] [2021-11-13 17:56:36,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631325268] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:56:36,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:56:36,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:56:36,045 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590468304] [2021-11-13 17:56:36,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:56:36,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:56:36,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:56:36,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:56:36,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:56:36,047 INFO L87 Difference]: Start difference. First operand 6597 states and 9693 transitions. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (10), 6 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-13 17:56:38,117 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:56:40,278 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:56:42,690 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:56:44,729 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:56:51,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:56:51,659 INFO L93 Difference]: Finished difference Result 20473 states and 30444 transitions. [2021-11-13 17:56:51,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 17:56:51,674 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (10), 6 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 98 [2021-11-13 17:56:51,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:56:51,756 INFO L225 Difference]: With dead ends: 20473 [2021-11-13 17:56:51,757 INFO L226 Difference]: Without dead ends: 13887 [2021-11-13 17:56:51,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-11-13 17:56:51,805 INFO L933 BasicCegarLoop]: 1523 mSDtfsCounter, 2133 mSDsluCounter, 2542 mSDsCounter, 0 mSdLazyCounter, 1548 mSolverCounterSat, 1593 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13649.35ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2272 SdHoareTripleChecker+Valid, 4065 SdHoareTripleChecker+Invalid, 3145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 32.82ms SdHoareTripleChecker+Time, 1593 IncrementalHoareTripleChecker+Valid, 1548 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14843.87ms IncrementalHoareTripleChecker+Time [2021-11-13 17:56:51,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2272 Valid, 4065 Invalid, 3145 Unknown, 0 Unchecked, 32.82ms Time], IncrementalHoareTripleChecker [1593 Valid, 1548 Invalid, 4 Unknown, 0 Unchecked, 14843.87ms Time] [2021-11-13 17:56:51,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13887 states. [2021-11-13 17:56:52,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13887 to 12437. [2021-11-13 17:56:52,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12437 states, 9104 states have (on average 1.3474297012302285) internal successors, (12267), 9423 states have internal predecessors, (12267), 2516 states have call successors, (2516), 623 states have call predecessors, (2516), 816 states have return successors, (3667), 2490 states have call predecessors, (3667), 2513 states have call successors, (3667) [2021-11-13 17:56:52,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12437 states to 12437 states and 18450 transitions. [2021-11-13 17:56:52,777 INFO L78 Accepts]: Start accepts. Automaton has 12437 states and 18450 transitions. Word has length 98 [2021-11-13 17:56:52,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:56:52,778 INFO L470 AbstractCegarLoop]: Abstraction has 12437 states and 18450 transitions. [2021-11-13 17:56:52,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 3 states have internal predecessors, (70), 2 states have call successors, (10), 6 states have call predecessors, (10), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-13 17:56:52,779 INFO L276 IsEmpty]: Start isEmpty. Operand 12437 states and 18450 transitions. [2021-11-13 17:56:52,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-13 17:56:52,800 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:56:52,800 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 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] [2021-11-13 17:56:52,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 17:56:52,801 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:56:52,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:56:52,801 INFO L85 PathProgramCache]: Analyzing trace with hash -173781947, now seen corresponding path program 1 times [2021-11-13 17:56:52,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:56:52,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003839016] [2021-11-13 17:56:52,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:56:52,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:56:53,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:53,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:56:53,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:53,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:56:53,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:53,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 17:56:53,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:53,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 17:56:53,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:53,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-13 17:56:53,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:53,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 17:56:53,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:53,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-13 17:56:53,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:53,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-13 17:56:53,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:53,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-13 17:56:53,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:53,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:56:53,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:53,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 17:56:53,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:56:53,903 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-13 17:56:53,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:56:53,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003839016] [2021-11-13 17:56:53,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003839016] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:56:53,904 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:56:53,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-13 17:56:53,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028382463] [2021-11-13 17:56:53,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:56:53,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 17:56:53,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:56:53,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 17:56:53,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-13 17:56:53,906 INFO L87 Difference]: Start difference. First operand 12437 states and 18450 transitions. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 4 states have internal predecessors, (85), 3 states have call successors, (12), 6 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 17:56:55,979 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:56:58,131 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:57:00,233 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:57:02,914 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:57:04,957 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:57:07,009 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:57:15,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:57:15,122 INFO L93 Difference]: Finished difference Result 26259 states and 39141 transitions. [2021-11-13 17:57:15,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 17:57:15,131 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 4 states have internal predecessors, (85), 3 states have call successors, (12), 6 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 2 states have call successors, (11) Word has length 124 [2021-11-13 17:57:15,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:57:15,218 INFO L225 Difference]: With dead ends: 26259 [2021-11-13 17:57:15,218 INFO L226 Difference]: Without dead ends: 13844 [2021-11-13 17:57:15,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-11-13 17:57:15,289 INFO L933 BasicCegarLoop]: 1149 mSDtfsCounter, 679 mSDsluCounter, 5547 mSDsCounter, 0 mSdLazyCounter, 2139 mSolverCounterSat, 696 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18782.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 6696 SdHoareTripleChecker+Invalid, 2841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 48.32ms SdHoareTripleChecker+Time, 696 IncrementalHoareTripleChecker+Valid, 2139 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20190.55ms IncrementalHoareTripleChecker+Time [2021-11-13 17:57:15,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [704 Valid, 6696 Invalid, 2841 Unknown, 0 Unchecked, 48.32ms Time], IncrementalHoareTripleChecker [696 Valid, 2139 Invalid, 6 Unknown, 0 Unchecked, 20190.55ms Time] [2021-11-13 17:57:15,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13844 states. [2021-11-13 17:57:16,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13844 to 12457. [2021-11-13 17:57:16,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12457 states, 9120 states have (on average 1.3468201754385964) internal successors, (12283), 9435 states have internal predecessors, (12283), 2520 states have call successors, (2520), 623 states have call predecessors, (2520), 816 states have return successors, (3671), 2498 states have call predecessors, (3671), 2517 states have call successors, (3671) [2021-11-13 17:57:16,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12457 states to 12457 states and 18474 transitions. [2021-11-13 17:57:16,220 INFO L78 Accepts]: Start accepts. Automaton has 12457 states and 18474 transitions. Word has length 124 [2021-11-13 17:57:16,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:57:16,221 INFO L470 AbstractCegarLoop]: Abstraction has 12457 states and 18474 transitions. [2021-11-13 17:57:16,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 4 states have internal predecessors, (85), 3 states have call successors, (12), 6 states have call predecessors, (12), 3 states have return successors, (11), 4 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 17:57:16,221 INFO L276 IsEmpty]: Start isEmpty. Operand 12457 states and 18474 transitions. [2021-11-13 17:57:16,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-13 17:57:16,235 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:57:16,236 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 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] [2021-11-13 17:57:16,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 17:57:16,236 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:57:16,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:57:16,237 INFO L85 PathProgramCache]: Analyzing trace with hash 582365067, now seen corresponding path program 1 times [2021-11-13 17:57:16,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:57:16,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966740085] [2021-11-13 17:57:16,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:57:16,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:57:17,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:17,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:57:17,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:17,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:57:17,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:17,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 17:57:17,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:17,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 17:57:17,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:17,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-11-13 17:57:17,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:17,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2021-11-13 17:57:17,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:17,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-11-13 17:57:17,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:17,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2021-11-13 17:57:17,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:17,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2021-11-13 17:57:17,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:17,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:57:17,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:17,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:57:17,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:17,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:57:17,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:17,810 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-13 17:57:17,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:57:17,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966740085] [2021-11-13 17:57:17,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966740085] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:57:17,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:57:17,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 17:57:17,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569226358] [2021-11-13 17:57:17,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:57:17,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 17:57:17,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:57:17,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 17:57:17,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:57:17,815 INFO L87 Difference]: Start difference. First operand 12457 states and 18474 transitions. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (13), 6 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 17:57:19,903 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:57:22,022 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.12s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:57:24,543 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:57:26,592 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:57:31,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:57:31,593 INFO L93 Difference]: Finished difference Result 26280 states and 39126 transitions. [2021-11-13 17:57:31,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 17:57:31,594 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (13), 6 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 130 [2021-11-13 17:57:31,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:57:31,694 INFO L225 Difference]: With dead ends: 26280 [2021-11-13 17:57:31,695 INFO L226 Difference]: Without dead ends: 13826 [2021-11-13 17:57:31,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-13 17:57:31,742 INFO L933 BasicCegarLoop]: 1132 mSDtfsCounter, 914 mSDsluCounter, 3280 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 956 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12067.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 939 SdHoareTripleChecker+Valid, 4412 SdHoareTripleChecker+Invalid, 2210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 28.34ms SdHoareTripleChecker+Time, 956 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13035.12ms IncrementalHoareTripleChecker+Time [2021-11-13 17:57:31,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [939 Valid, 4412 Invalid, 2210 Unknown, 0 Unchecked, 28.34ms Time], IncrementalHoareTripleChecker [956 Valid, 1250 Invalid, 4 Unknown, 0 Unchecked, 13035.12ms Time] [2021-11-13 17:57:31,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13826 states. [2021-11-13 17:57:32,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13826 to 12466. [2021-11-13 17:57:32,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12466 states, 9129 states have (on average 1.346478256106912) internal successors, (12292), 9444 states have internal predecessors, (12292), 2520 states have call successors, (2520), 623 states have call predecessors, (2520), 816 states have return successors, (3671), 2498 states have call predecessors, (3671), 2517 states have call successors, (3671) [2021-11-13 17:57:32,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12466 states to 12466 states and 18483 transitions. [2021-11-13 17:57:32,739 INFO L78 Accepts]: Start accepts. Automaton has 12466 states and 18483 transitions. Word has length 130 [2021-11-13 17:57:32,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:57:32,739 INFO L470 AbstractCegarLoop]: Abstraction has 12466 states and 18483 transitions. [2021-11-13 17:57:32,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 4 states have internal predecessors, (85), 2 states have call successors, (13), 6 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 17:57:32,740 INFO L276 IsEmpty]: Start isEmpty. Operand 12466 states and 18483 transitions. [2021-11-13 17:57:32,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-13 17:57:32,753 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:57:32,754 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 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] [2021-11-13 17:57:32,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 17:57:32,754 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:57:32,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:57:32,755 INFO L85 PathProgramCache]: Analyzing trace with hash -413463987, now seen corresponding path program 1 times [2021-11-13 17:57:32,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:57:32,755 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763309440] [2021-11-13 17:57:32,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:57:32,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:57:33,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:33,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:57:33,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:33,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:57:33,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:33,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 17:57:33,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:33,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 17:57:33,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:33,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-13 17:57:33,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:33,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 17:57:33,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:33,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-13 17:57:33,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:33,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 17:57:33,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:33,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-13 17:57:33,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:33,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:57:33,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:33,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:57:33,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:33,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:57:33,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:33,902 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-13 17:57:33,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:57:33,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763309440] [2021-11-13 17:57:33,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763309440] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:57:33,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727238521] [2021-11-13 17:57:33,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:57:33,904 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:57:33,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:57:33,909 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:57:33,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 17:57:35,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:35,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 2166 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-13 17:57:35,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:57:35,671 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-13 17:57:35,672 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 17:57:35,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727238521] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:57:35,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 17:57:35,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2021-11-13 17:57:35,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618249180] [2021-11-13 17:57:35,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:57:35,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:57:35,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:57:35,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:57:35,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-13 17:57:35,674 INFO L87 Difference]: Start difference. First operand 12466 states and 18483 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 17:57:37,750 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:57:38,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:57:38,773 INFO L93 Difference]: Finished difference Result 20320 states and 30035 transitions. [2021-11-13 17:57:38,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:57:38,774 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 131 [2021-11-13 17:57:38,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:57:38,834 INFO L225 Difference]: With dead ends: 20320 [2021-11-13 17:57:38,834 INFO L226 Difference]: Without dead ends: 7867 [2021-11-13 17:57:38,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-11-13 17:57:38,885 INFO L933 BasicCegarLoop]: 1195 mSDtfsCounter, 38 mSDsluCounter, 3576 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2169.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 4771 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.13ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2400.22ms IncrementalHoareTripleChecker+Time [2021-11-13 17:57:38,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 4771 Invalid, 25 Unknown, 0 Unchecked, 8.13ms Time], IncrementalHoareTripleChecker [7 Valid, 17 Invalid, 1 Unknown, 0 Unchecked, 2400.22ms Time] [2021-11-13 17:57:38,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7867 states. [2021-11-13 17:57:39,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7867 to 7640. [2021-11-13 17:57:39,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7640 states, 5599 states have (on average 1.342025361671727) internal successors, (7514), 5793 states have internal predecessors, (7514), 1533 states have call successors, (1533), 397 states have call predecessors, (1533), 507 states have return successors, (2172), 1510 states have call predecessors, (2172), 1530 states have call successors, (2172) [2021-11-13 17:57:39,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7640 states to 7640 states and 11219 transitions. [2021-11-13 17:57:39,521 INFO L78 Accepts]: Start accepts. Automaton has 7640 states and 11219 transitions. Word has length 131 [2021-11-13 17:57:39,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:57:39,522 INFO L470 AbstractCegarLoop]: Abstraction has 7640 states and 11219 transitions. [2021-11-13 17:57:39,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 2 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 17:57:39,522 INFO L276 IsEmpty]: Start isEmpty. Operand 7640 states and 11219 transitions. [2021-11-13 17:57:39,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-13 17:57:39,539 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:57:39,540 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:57:39,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 17:57:39,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-13 17:57:39,758 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:57:39,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:57:39,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1984420258, now seen corresponding path program 1 times [2021-11-13 17:57:39,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:57:39,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477243163] [2021-11-13 17:57:39,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:57:39,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:57:39,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:39,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:57:39,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:39,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:57:39,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:40,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 17:57:40,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:40,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 17:57:40,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:40,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-13 17:57:40,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:40,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:57:40,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:40,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-11-13 17:57:40,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:40,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:57:40,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:40,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 17:57:40,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:40,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2021-11-13 17:57:40,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:40,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2021-11-13 17:57:40,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:40,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-13 17:57:40,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:40,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2021-11-13 17:57:40,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:40,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-11-13 17:57:40,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:57:40,240 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-13 17:57:40,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:57:40,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477243163] [2021-11-13 17:57:40,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477243163] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:57:40,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:57:40,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:57:40,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999085384] [2021-11-13 17:57:40,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:57:40,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:57:40,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:57:40,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:57:40,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:57:40,244 INFO L87 Difference]: Start difference. First operand 7640 states and 11219 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 17:57:42,321 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:57:44,548 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.23s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:57:46,710 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:57:49,072 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:57:51,134 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 17:58:00,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:58:00,736 INFO L93 Difference]: Finished difference Result 22089 states and 33842 transitions. [2021-11-13 17:58:00,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-13 17:58:00,746 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 135 [2021-11-13 17:58:00,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:58:00,812 INFO L225 Difference]: With dead ends: 22089 [2021-11-13 17:58:00,812 INFO L226 Difference]: Without dead ends: 13885 [2021-11-13 17:58:00,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-11-13 17:58:00,838 INFO L933 BasicCegarLoop]: 1620 mSDtfsCounter, 2467 mSDsluCounter, 4056 mSDsCounter, 0 mSdLazyCounter, 2934 mSolverCounterSat, 1759 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17925.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2619 SdHoareTripleChecker+Valid, 5676 SdHoareTripleChecker+Invalid, 4698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 40.97ms SdHoareTripleChecker+Time, 1759 IncrementalHoareTripleChecker+Valid, 2934 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19572.13ms IncrementalHoareTripleChecker+Time [2021-11-13 17:58:00,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2619 Valid, 5676 Invalid, 4698 Unknown, 0 Unchecked, 40.97ms Time], IncrementalHoareTripleChecker [1759 Valid, 2934 Invalid, 5 Unknown, 0 Unchecked, 19572.13ms Time] [2021-11-13 17:58:00,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13885 states. [2021-11-13 17:58:01,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13885 to 11472. [2021-11-13 17:58:01,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11472 states, 8339 states have (on average 1.337570452092577) internal successors, (11154), 8682 states have internal predecessors, (11154), 2250 states have call successors, (2250), 556 states have call predecessors, (2250), 882 states have return successors, (4291), 2306 states have call predecessors, (4291), 2247 states have call successors, (4291) [2021-11-13 17:58:01,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11472 states to 11472 states and 17695 transitions. [2021-11-13 17:58:01,770 INFO L78 Accepts]: Start accepts. Automaton has 11472 states and 17695 transitions. Word has length 135 [2021-11-13 17:58:01,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:58:01,771 INFO L470 AbstractCegarLoop]: Abstraction has 11472 states and 17695 transitions. [2021-11-13 17:58:01,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 3 states have internal predecessors, (90), 2 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 17:58:01,771 INFO L276 IsEmpty]: Start isEmpty. Operand 11472 states and 17695 transitions. [2021-11-13 17:58:01,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-13 17:58:01,781 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:58:01,781 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:58:01,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 17:58:01,782 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:58:01,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:58:01,782 INFO L85 PathProgramCache]: Analyzing trace with hash 2017702408, now seen corresponding path program 1 times [2021-11-13 17:58:01,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:58:01,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811701124] [2021-11-13 17:58:01,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:58:01,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:58:02,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:02,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:58:02,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:02,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 17:58:02,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:02,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 17:58:02,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:02,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 17:58:02,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:02,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-11-13 17:58:02,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:02,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 17:58:02,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:02,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-11-13 17:58:02,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:02,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-11-13 17:58:02,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:02,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-11-13 17:58:02,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:02,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2021-11-13 17:58:02,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:02,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 17:58:02,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:02,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 17:58:02,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:02,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 17:58:02,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:58:02,629 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-13 17:58:02,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:58:02,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811701124] [2021-11-13 17:58:02,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811701124] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:58:02,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597823243] [2021-11-13 17:58:02,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:58:02,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:58:02,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:58:02,634 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:58:02,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:01:35,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:35,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 2196 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 18:01:35,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:01:36,052 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 36 proven. 1 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-13 18:01:36,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:01:36,614 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-13 18:01:36,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597823243] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:01:36,614 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:01:36,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 14 [2021-11-13 18:01:36,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154128003] [2021-11-13 18:01:36,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:01:36,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 18:01:36,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:36,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 18:01:36,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:01:36,617 INFO L87 Difference]: Start difference. First operand 11472 states and 17695 transitions. Second operand has 14 states, 14 states have (on average 8.571428571428571) internal successors, (120), 10 states have internal predecessors, (120), 2 states have call successors, (32), 6 states have call predecessors, (32), 5 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-13 18:01:38,686 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:01:40,813 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:01:43,752 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:01:45,800 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:01:53,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:01:53,036 INFO L93 Difference]: Finished difference Result 24483 states and 37834 transitions. [2021-11-13 18:01:53,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 18:01:53,037 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.571428571428571) internal successors, (120), 10 states have internal predecessors, (120), 2 states have call successors, (32), 6 states have call predecessors, (32), 5 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 137 [2021-11-13 18:01:53,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:01:53,122 INFO L225 Difference]: With dead ends: 24483 [2021-11-13 18:01:53,122 INFO L226 Difference]: Without dead ends: 13017 [2021-11-13 18:01:53,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 290 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2021-11-13 18:01:53,172 INFO L933 BasicCegarLoop]: 1150 mSDtfsCounter, 925 mSDsluCounter, 7515 mSDsCounter, 0 mSdLazyCounter, 2243 mSolverCounterSat, 947 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13703.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 950 SdHoareTripleChecker+Valid, 8665 SdHoareTripleChecker+Invalid, 3194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 41.27ms SdHoareTripleChecker+Time, 947 IncrementalHoareTripleChecker+Valid, 2243 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14925.88ms IncrementalHoareTripleChecker+Time [2021-11-13 18:01:53,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [950 Valid, 8665 Invalid, 3194 Unknown, 0 Unchecked, 41.27ms Time], IncrementalHoareTripleChecker [947 Valid, 2243 Invalid, 4 Unknown, 0 Unchecked, 14925.88ms Time] [2021-11-13 18:01:53,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13017 states. [2021-11-13 18:01:53,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13017 to 11483. [2021-11-13 18:01:53,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11483 states, 8350 states have (on average 1.337125748502994) internal successors, (11165), 8693 states have internal predecessors, (11165), 2250 states have call successors, (2250), 556 states have call predecessors, (2250), 882 states have return successors, (4291), 2306 states have call predecessors, (4291), 2247 states have call successors, (4291) [2021-11-13 18:01:54,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11483 states to 11483 states and 17706 transitions. [2021-11-13 18:01:54,013 INFO L78 Accepts]: Start accepts. Automaton has 11483 states and 17706 transitions. Word has length 137 [2021-11-13 18:01:54,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:01:54,014 INFO L470 AbstractCegarLoop]: Abstraction has 11483 states and 17706 transitions. [2021-11-13 18:01:54,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.571428571428571) internal successors, (120), 10 states have internal predecessors, (120), 2 states have call successors, (32), 6 states have call predecessors, (32), 5 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-13 18:01:54,014 INFO L276 IsEmpty]: Start isEmpty. Operand 11483 states and 17706 transitions. [2021-11-13 18:01:54,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-13 18:01:54,023 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:01:54,024 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:01:54,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:01:54,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:01:54,249 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:01:54,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:01:54,250 INFO L85 PathProgramCache]: Analyzing trace with hash -858214074, now seen corresponding path program 2 times [2021-11-13 18:01:54,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:01:54,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940977729] [2021-11-13 18:01:54,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:01:54,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:01:54,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:55,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:01:55,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:55,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:01:55,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:55,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:01:55,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:55,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:01:55,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:55,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-13 18:01:55,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:55,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-13 18:01:55,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:55,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-13 18:01:55,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:55,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-13 18:01:55,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:55,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-13 18:01:55,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:55,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-11-13 18:01:55,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:55,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:01:55,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:56,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:01:56,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:56,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 18:01:56,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:01:56,084 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-13 18:01:56,084 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:01:56,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940977729] [2021-11-13 18:01:56,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940977729] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:01:56,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:01:56,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-11-13 18:01:56,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586752306] [2021-11-13 18:01:56,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:01:56,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-13 18:01:56,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:01:56,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-13 18:01:56,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-11-13 18:01:56,088 INFO L87 Difference]: Start difference. First operand 11483 states and 17706 transitions. Second operand has 16 states, 16 states have (on average 5.75) internal successors, (92), 10 states have internal predecessors, (92), 4 states have call successors, (14), 6 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 18:01:58,163 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:02:00,363 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:02:02,554 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:02:04,774 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:02:07,013 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:02:09,177 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:02:11,364 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:02:14,079 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:02:16,134 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:02:18,170 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:02:26,064 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:02:28,124 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:02:30,163 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:02:47,282 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:02:49,336 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:02:51,379 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:03:00,003 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:03:02,061 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:03:04,103 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:03:10,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:03:10,398 INFO L93 Difference]: Finished difference Result 27622 states and 43161 transitions. [2021-11-13 18:03:10,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-13 18:03:10,399 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.75) internal successors, (92), 10 states have internal predecessors, (92), 4 states have call successors, (14), 6 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) Word has length 140 [2021-11-13 18:03:10,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:03:10,491 INFO L225 Difference]: With dead ends: 27622 [2021-11-13 18:03:10,491 INFO L226 Difference]: Without dead ends: 16184 [2021-11-13 18:03:10,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=241, Invalid=1565, Unknown=0, NotChecked=0, Total=1806 [2021-11-13 18:03:10,538 INFO L933 BasicCegarLoop]: 2545 mSDtfsCounter, 5089 mSDsluCounter, 23212 mSDsCounter, 0 mSdLazyCounter, 13801 mSolverCounterSat, 2634 mSolverCounterUnsat, 19 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 65697.50ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5351 SdHoareTripleChecker+Valid, 25757 SdHoareTripleChecker+Invalid, 16454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 160.80ms SdHoareTripleChecker+Time, 2634 IncrementalHoareTripleChecker+Valid, 13801 IncrementalHoareTripleChecker+Invalid, 19 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 71209.02ms IncrementalHoareTripleChecker+Time [2021-11-13 18:03:10,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5351 Valid, 25757 Invalid, 16454 Unknown, 0 Unchecked, 160.80ms Time], IncrementalHoareTripleChecker [2634 Valid, 13801 Invalid, 19 Unknown, 0 Unchecked, 71209.02ms Time] [2021-11-13 18:03:10,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16184 states. [2021-11-13 18:03:11,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16184 to 11471. [2021-11-13 18:03:11,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11471 states, 8338 states have (on average 1.3370112736867354) internal successors, (11148), 8682 states have internal predecessors, (11148), 2250 states have call successors, (2250), 556 states have call predecessors, (2250), 882 states have return successors, (4291), 2305 states have call predecessors, (4291), 2247 states have call successors, (4291) [2021-11-13 18:03:11,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11471 states to 11471 states and 17689 transitions. [2021-11-13 18:03:11,536 INFO L78 Accepts]: Start accepts. Automaton has 11471 states and 17689 transitions. Word has length 140 [2021-11-13 18:03:11,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:03:11,536 INFO L470 AbstractCegarLoop]: Abstraction has 11471 states and 17689 transitions. [2021-11-13 18:03:11,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.75) internal successors, (92), 10 states have internal predecessors, (92), 4 states have call successors, (14), 6 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 18:03:11,537 INFO L276 IsEmpty]: Start isEmpty. Operand 11471 states and 17689 transitions. [2021-11-13 18:03:11,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-13 18:03:11,552 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:03:11,552 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:03:11,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-13 18:03:11,553 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:03:11,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:03:11,553 INFO L85 PathProgramCache]: Analyzing trace with hash -892285559, now seen corresponding path program 1 times [2021-11-13 18:03:11,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:03:11,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458547165] [2021-11-13 18:03:11,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:11,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:03:11,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:11,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:03:11,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:11,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:03:11,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:11,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:03:11,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:11,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-11-13 18:03:11,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:11,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-11-13 18:03:11,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:11,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-11-13 18:03:11,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:11,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2021-11-13 18:03:11,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:12,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2021-11-13 18:03:12,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:12,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2021-11-13 18:03:12,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:12,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-11-13 18:03:12,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:12,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:03:12,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:12,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 18:03:12,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:12,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-13 18:03:12,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:12,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:03:12,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:12,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:03:12,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:12,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-13 18:03:12,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:03:12,185 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-13 18:03:12,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:03:12,185 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458547165] [2021-11-13 18:03:12,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458547165] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:03:12,185 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:03:12,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 18:03:12,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581593897] [2021-11-13 18:03:12,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:03:12,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:03:12,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:03:12,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:03:12,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:03:12,187 INFO L87 Difference]: Start difference. First operand 11471 states and 17689 transitions. Second operand has 8 states, 8 states have (on average 12.25) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 18:03:14,334 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:03:16,485 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:03:18,775 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:03:20,822 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:03:24,382 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:03:26,432 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.05s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:03:31,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:03:31,555 INFO L93 Difference]: Finished difference Result 29865 states and 46874 transitions. [2021-11-13 18:03:31,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:03:31,556 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 161 [2021-11-13 18:03:31,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:03:31,721 INFO L225 Difference]: With dead ends: 29865 [2021-11-13 18:03:31,721 INFO L226 Difference]: Without dead ends: 18439 [2021-11-13 18:03:31,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:03:31,796 INFO L933 BasicCegarLoop]: 1733 mSDtfsCounter, 2007 mSDsluCounter, 4558 mSDsCounter, 0 mSdLazyCounter, 1642 mSolverCounterSat, 1145 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16934.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2134 SdHoareTripleChecker+Valid, 6291 SdHoareTripleChecker+Invalid, 2793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 35.04ms SdHoareTripleChecker+Time, 1145 IncrementalHoareTripleChecker+Valid, 1642 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18144.33ms IncrementalHoareTripleChecker+Time [2021-11-13 18:03:31,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2134 Valid, 6291 Invalid, 2793 Unknown, 0 Unchecked, 35.04ms Time], IncrementalHoareTripleChecker [1145 Valid, 1642 Invalid, 6 Unknown, 0 Unchecked, 18144.33ms Time] [2021-11-13 18:03:31,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18439 states. [2021-11-13 18:03:33,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18439 to 11487. [2021-11-13 18:03:33,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11487 states, 8354 states have (on average 1.336365812784295) internal successors, (11164), 8698 states have internal predecessors, (11164), 2250 states have call successors, (2250), 556 states have call predecessors, (2250), 882 states have return successors, (4291), 2305 states have call predecessors, (4291), 2247 states have call successors, (4291) [2021-11-13 18:03:33,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11487 states to 11487 states and 17705 transitions. [2021-11-13 18:03:33,161 INFO L78 Accepts]: Start accepts. Automaton has 11487 states and 17705 transitions. Word has length 161 [2021-11-13 18:03:33,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:03:33,162 INFO L470 AbstractCegarLoop]: Abstraction has 11487 states and 17705 transitions. [2021-11-13 18:03:33,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 4 states have internal predecessors, (98), 2 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 18:03:33,162 INFO L276 IsEmpty]: Start isEmpty. Operand 11487 states and 17705 transitions. [2021-11-13 18:03:33,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-13 18:03:33,176 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:03:33,177 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:03:33,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-13 18:03:33,177 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:03:33,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:03:33,178 INFO L85 PathProgramCache]: Analyzing trace with hash 328420094, now seen corresponding path program 1 times [2021-11-13 18:03:33,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:03:33,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626818128] [2021-11-13 18:03:33,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:03:33,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:03:35,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:03:35,882 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-13 18:03:37,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:03:38,768 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-13 18:03:38,768 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-13 18:03:38,769 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-13 18:03:38,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-13 18:03:38,775 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:03:38,778 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 18:03:38,926 WARN L418 cessorBacktranslator]: Generated EnsuresSpecification free ensures #res.base == #ptr.base && #res.offset == #ptr.offset; is not ensure(true) [2021-11-13 18:03:39,160 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.translateProgramExecution(InlinerBacktranslator.java:203) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:216) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:206) at de.uni_freiburg.informatik.ultimate.core.lib.results.UnprovableResult.getProgramExecutionAsString(UnprovableResult.java:132) at de.uni_freiburg.informatik.ultimate.core.lib.results.UnprovableResult.getLongDescription(UnprovableResult.java:125) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportLocationResults(TraceAbstractionStarter.java:586) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:181) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-13 18:03:39,163 INFO L158 Benchmark]: Toolchain (without parser) took 548046.48ms. Allocated memory was 96.5MB in the beginning and 1.0GB in the end (delta: 945.8MB). Free memory was 68.6MB in the beginning and 372.5MB in the end (delta: -303.9MB). Peak memory consumption was 704.6MB. Max. memory is 16.1GB. [2021-11-13 18:03:39,164 INFO L158 Benchmark]: CDTParser took 0.32ms. Allocated memory is still 96.5MB. Free memory was 75.7MB in the beginning and 75.6MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:03:39,164 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2520.35ms. Allocated memory was 96.5MB in the beginning and 136.3MB in the end (delta: 39.8MB). Free memory was 68.3MB in the beginning and 50.4MB in the end (delta: 17.9MB). Peak memory consumption was 66.9MB. Max. memory is 16.1GB. [2021-11-13 18:03:39,165 INFO L158 Benchmark]: Boogie Procedure Inliner took 267.70ms. Allocated memory is still 136.3MB. Free memory was 50.4MB in the beginning and 65.2MB in the end (delta: -14.8MB). Peak memory consumption was 11.8MB. Max. memory is 16.1GB. [2021-11-13 18:03:39,165 INFO L158 Benchmark]: Boogie Preprocessor took 355.76ms. Allocated memory was 136.3MB in the beginning and 216.0MB in the end (delta: 79.7MB). Free memory was 65.2MB in the beginning and 145.2MB in the end (delta: -80.0MB). Peak memory consumption was 34.2MB. Max. memory is 16.1GB. [2021-11-13 18:03:39,166 INFO L158 Benchmark]: RCFGBuilder took 13146.64ms. Allocated memory was 216.0MB in the beginning and 455.1MB in the end (delta: 239.1MB). Free memory was 145.2MB in the beginning and 209.6MB in the end (delta: -64.4MB). Peak memory consumption was 270.6MB. Max. memory is 16.1GB. [2021-11-13 18:03:39,166 INFO L158 Benchmark]: TraceAbstraction took 531744.56ms. Allocated memory was 455.1MB in the beginning and 1.0GB in the end (delta: 587.2MB). Free memory was 209.6MB in the beginning and 372.5MB in the end (delta: -162.8MB). Peak memory consumption was 486.2MB. Max. memory is 16.1GB. [2021-11-13 18:03:39,168 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32ms. Allocated memory is still 96.5MB. Free memory was 75.7MB in the beginning and 75.6MB in the end (delta: 83.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2520.35ms. Allocated memory was 96.5MB in the beginning and 136.3MB in the end (delta: 39.8MB). Free memory was 68.3MB in the beginning and 50.4MB in the end (delta: 17.9MB). Peak memory consumption was 66.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 267.70ms. Allocated memory is still 136.3MB. Free memory was 50.4MB in the beginning and 65.2MB in the end (delta: -14.8MB). Peak memory consumption was 11.8MB. Max. memory is 16.1GB. * Boogie Preprocessor took 355.76ms. Allocated memory was 136.3MB in the beginning and 216.0MB in the end (delta: 79.7MB). Free memory was 65.2MB in the beginning and 145.2MB in the end (delta: -80.0MB). Peak memory consumption was 34.2MB. Max. memory is 16.1GB. * RCFGBuilder took 13146.64ms. Allocated memory was 216.0MB in the beginning and 455.1MB in the end (delta: 239.1MB). Free memory was 145.2MB in the beginning and 209.6MB in the end (delta: -64.4MB). Peak memory consumption was 270.6MB. Max. memory is 16.1GB. * TraceAbstraction took 531744.56ms. Allocated memory was 455.1MB in the beginning and 1.0GB in the end (delta: 587.2MB). Free memory was 209.6MB in the beginning and 372.5MB in the end (delta: -162.8MB). Peak memory consumption was 486.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.boogie.preprocessor: - GenericResult: Unfinished Backtranslation Generated EnsuresSpecification free ensures #res.base == #ptr.base && #res.offset == #ptr.offset; is not ensure(true) * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-13 18:03:39,405 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-11-13 18:03:39,445 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-64bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y --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 Automizer --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 9f2fac8642c25f1335350a2814ff7cf3c4ea0fb7f4feaed63baec564397e8f24 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:03:42,110 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:03:42,113 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:03:42,151 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:03:42,152 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:03:42,154 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:03:42,157 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:03:42,160 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:03:42,163 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:03:42,164 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:03:42,166 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:03:42,168 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:03:42,169 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:03:42,170 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:03:42,172 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:03:42,174 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:03:42,176 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:03:42,177 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:03:42,180 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:03:42,183 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:03:42,186 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:03:42,188 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:03:42,190 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:03:42,191 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:03:42,195 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:03:42,204 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:03:42,205 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:03:42,206 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:03:42,208 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:03:42,210 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:03:42,211 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:03:42,213 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:03:42,214 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:03:42,216 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:03:42,222 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:03:42,223 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:03:42,224 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:03:42,225 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:03:42,225 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:03:42,228 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:03:42,229 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:03:42,230 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2021-11-13 18:03:42,288 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:03:42,289 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:03:42,290 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:03:42,290 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:03:42,291 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:03:42,292 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:03:42,294 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:03:42,294 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:03:42,294 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:03:42,295 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:03:42,296 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:03:42,296 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:03:42,297 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:03:42,297 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:03:42,297 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 18:03:42,298 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 18:03:42,298 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:03:42,298 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:03:42,298 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:03:42,299 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:03:42,299 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:03:42,299 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:03:42,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:03:42,300 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:03:42,300 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:03:42,301 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:03:42,301 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-13 18:03:42,301 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 18:03:42,301 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:03:42,302 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:03:42,302 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:03:42,302 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:03:42,303 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 18:03:42,303 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9f2fac8642c25f1335350a2814ff7cf3c4ea0fb7f4feaed63baec564397e8f24 [2021-11-13 18:03:42,863 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:03:42,907 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:03:42,912 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:03:42,914 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:03:42,917 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:03:42,919 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i [2021-11-13 18:03:43,016 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/data/89206e2b2/bae3f0f028054900b1b7e3181f5321bf/FLAG8c28d425c [2021-11-13 18:03:44,110 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:03:44,111 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i [2021-11-13 18:03:44,179 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/data/89206e2b2/bae3f0f028054900b1b7e3181f5321bf/FLAG8c28d425c [2021-11-13 18:03:44,474 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/data/89206e2b2/bae3f0f028054900b1b7e3181f5321bf [2021-11-13 18:03:44,478 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:03:44,479 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:03:44,481 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:03:44,482 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:03:44,486 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:03:44,487 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:03:44" (1/1) ... [2021-11-13 18:03:44,489 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1239bc21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:44, skipping insertion in model container [2021-11-13 18:03:44,489 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:03:44" (1/1) ... [2021-11-13 18:03:44,498 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:03:44,747 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:03:46,124 WARN L228 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_8ef001b1-94e2-4ce5-a149-9818a51e6261/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i[202214,202227] [2021-11-13 18:03:46,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:03:46,844 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:03:47,081 WARN L228 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_8ef001b1-94e2-4ce5-a149-9818a51e6261/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i[202214,202227] [2021-11-13 18:03:47,251 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:03:47,412 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:03:47,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:47 WrapperNode [2021-11-13 18:03:47,413 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:03:47,415 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:03:47,415 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:03:47,415 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:03:47,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:47" (1/1) ... [2021-11-13 18:03:47,535 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:47" (1/1) ... [2021-11-13 18:03:47,719 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:03:47,719 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:03:47,720 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:03:47,720 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:03:47,729 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:47" (1/1) ... [2021-11-13 18:03:47,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:47" (1/1) ... [2021-11-13 18:03:47,761 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:47" (1/1) ... [2021-11-13 18:03:47,761 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:47" (1/1) ... [2021-11-13 18:03:47,894 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:47" (1/1) ... [2021-11-13 18:03:47,928 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:47" (1/1) ... [2021-11-13 18:03:47,961 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:47" (1/1) ... [2021-11-13 18:03:47,984 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:03:47,990 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:03:47,990 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:03:47,991 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:03:47,992 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:47" (1/1) ... [2021-11-13 18:03:48,001 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:03:48,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:03:48,027 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:03:48,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:03:48,127 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_set [2021-11-13 18:03:48,127 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_set [2021-11-13 18:03:48,128 INFO L130 BoogieDeclarations]: Found specification of procedure mwifiex_unregister_dev [2021-11-13 18:03:48,128 INFO L138 BoogieDeclarations]: Found implementation of procedure mwifiex_unregister_dev [2021-11-13 18:03:48,128 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_fill_bulk_urb_2 [2021-11-13 18:03:48,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_fill_bulk_urb_2 [2021-11-13 18:03:48,128 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-13 18:03:48,129 INFO L130 BoogieDeclarations]: Found specification of procedure skb_copy_from_linear_data [2021-11-13 18:03:48,129 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_copy_from_linear_data [2021-11-13 18:03:48,129 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_3 [2021-11-13 18:03:48,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_3 [2021-11-13 18:03:48,130 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-13 18:03:48,130 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-13 18:03:48,130 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-13 18:03:48,130 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-13 18:03:48,130 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-13 18:03:48,131 INFO L130 BoogieDeclarations]: Found specification of procedure usb_bulk_msg [2021-11-13 18:03:48,131 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_bulk_msg [2021-11-13 18:03:48,131 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-13 18:03:48,131 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-13 18:03:48,132 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_xfer_bulk [2021-11-13 18:03:48,132 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_xfer_bulk [2021-11-13 18:03:48,132 INFO L130 BoogieDeclarations]: Found specification of procedure skb_push [2021-11-13 18:03:48,132 INFO L138 BoogieDeclarations]: Found implementation of procedure skb_push [2021-11-13 18:03:48,132 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2021-11-13 18:03:48,133 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2021-11-13 18:03:48,133 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-13 18:03:48,133 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-13 18:03:48,133 INFO L130 BoogieDeclarations]: Found specification of procedure mwifiex_usb_disconnect [2021-11-13 18:03:48,134 INFO L138 BoogieDeclarations]: Found implementation of procedure mwifiex_usb_disconnect [2021-11-13 18:03:48,134 INFO L130 BoogieDeclarations]: Found specification of procedure __create_pipe [2021-11-13 18:03:48,134 INFO L138 BoogieDeclarations]: Found implementation of procedure __create_pipe [2021-11-13 18:03:48,134 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-13 18:03:48,134 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-13 18:03:48,135 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_alloc_urb [2021-11-13 18:03:48,135 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_alloc_urb [2021-11-13 18:03:48,135 INFO L130 BoogieDeclarations]: Found specification of procedure usb_kill_urb [2021-11-13 18:03:48,135 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_kill_urb [2021-11-13 18:03:48,135 INFO L130 BoogieDeclarations]: Found specification of procedure mwifiex_get_priv [2021-11-13 18:03:48,136 INFO L138 BoogieDeclarations]: Found implementation of procedure mwifiex_get_priv [2021-11-13 18:03:48,136 INFO L130 BoogieDeclarations]: Found specification of procedure mwifiex_usb_submit_rx_urb [2021-11-13 18:03:48,137 INFO L138 BoogieDeclarations]: Found implementation of procedure mwifiex_usb_submit_rx_urb [2021-11-13 18:03:48,137 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2021-11-13 18:03:48,137 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2021-11-13 18:03:48,137 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-13 18:03:48,137 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-13 18:03:48,138 INFO L130 BoogieDeclarations]: Found specification of procedure mwifiex_usb_rx_complete [2021-11-13 18:03:48,138 INFO L138 BoogieDeclarations]: Found implementation of procedure mwifiex_usb_rx_complete [2021-11-13 18:03:48,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-13 18:03:48,138 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_in [2021-11-13 18:03:48,139 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_in [2021-11-13 18:03:48,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-13 18:03:48,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-13 18:03:48,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-13 18:03:48,140 INFO L130 BoogieDeclarations]: Found specification of procedure dev_alloc_skb [2021-11-13 18:03:48,141 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_alloc_skb [2021-11-13 18:03:48,142 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-13 18:03:48,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-13 18:03:48,143 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_read [2021-11-13 18:03:48,143 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_read [2021-11-13 18:03:48,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-11-13 18:03:48,144 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-11-13 18:03:48,144 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-13 18:03:48,144 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-13 18:03:48,145 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 18:03:48,145 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop___0 [2021-11-13 18:03:48,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop___0 [2021-11-13 18:03:48,146 INFO L130 BoogieDeclarations]: Found specification of procedure dev_kfree_skb_any [2021-11-13 18:03:48,146 INFO L138 BoogieDeclarations]: Found implementation of procedure dev_kfree_skb_any [2021-11-13 18:03:48,146 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_inc [2021-11-13 18:03:48,147 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_inc [2021-11-13 18:03:48,147 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2021-11-13 18:03:48,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2021-11-13 18:03:48,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 18:03:48,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:03:48,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-13 18:03:48,149 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-13 18:03:48,149 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2021-11-13 18:03:48,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2021-11-13 18:03:48,149 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-13 18:03:48,149 INFO L130 BoogieDeclarations]: Found specification of procedure mwifiex_usb_cmd_event_complete [2021-11-13 18:03:48,150 INFO L138 BoogieDeclarations]: Found implementation of procedure mwifiex_usb_cmd_event_complete [2021-11-13 18:03:48,150 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_set_intfdata_8 [2021-11-13 18:03:48,150 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_set_intfdata_8 [2021-11-13 18:03:48,150 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 18:03:48,150 INFO L130 BoogieDeclarations]: Found specification of procedure atomic_dec [2021-11-13 18:03:48,151 INFO L138 BoogieDeclarations]: Found implementation of procedure atomic_dec [2021-11-13 18:03:48,151 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_num [2021-11-13 18:03:48,151 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_num [2021-11-13 18:03:48,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-13 18:03:48,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-13 18:03:48,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-13 18:03:48,153 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 18:03:48,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-13 18:03:48,153 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 18:03:48,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-13 18:03:48,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 18:03:48,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-13 18:03:48,155 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-13 18:03:48,155 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_get_intfdata_10 [2021-11-13 18:03:48,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_get_intfdata_10 [2021-11-13 18:03:48,156 INFO L130 BoogieDeclarations]: Found specification of procedure kzalloc [2021-11-13 18:03:48,156 INFO L138 BoogieDeclarations]: Found implementation of procedure kzalloc [2021-11-13 18:03:48,156 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_free_urb [2021-11-13 18:03:48,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_free_urb [2021-11-13 18:03:48,156 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-13 18:03:48,156 INFO L130 BoogieDeclarations]: Found specification of procedure mwifiex_usb_resume [2021-11-13 18:03:48,157 INFO L138 BoogieDeclarations]: Found implementation of procedure mwifiex_usb_resume [2021-11-13 18:03:48,157 INFO L130 BoogieDeclarations]: Found specification of procedure queue_work [2021-11-13 18:03:48,157 INFO L138 BoogieDeclarations]: Found implementation of procedure queue_work [2021-11-13 18:03:48,157 INFO L130 BoogieDeclarations]: Found specification of procedure interface_to_usbdev [2021-11-13 18:03:48,158 INFO L138 BoogieDeclarations]: Found implementation of procedure interface_to_usbdev [2021-11-13 18:03:48,158 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u8 [2021-11-13 18:03:48,158 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-13 18:03:48,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-13 18:03:48,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:03:48,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:03:48,160 INFO L130 BoogieDeclarations]: Found specification of procedure usb_endpoint_dir_out [2021-11-13 18:03:48,163 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_endpoint_dir_out [2021-11-13 18:03:49,753 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-13 18:03:52,852 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stop___0FINAL: assume true; [2021-11-13 18:04:08,498 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:04:08,499 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 18:04:08,503 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:04:08 BoogieIcfgContainer [2021-11-13 18:04:08,503 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:04:08,505 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:04:08,505 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:04:08,508 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:04:08,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:03:44" (1/3) ... [2021-11-13 18:04:08,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c79f4d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:04:08, skipping insertion in model container [2021-11-13 18:04:08,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:03:47" (2/3) ... [2021-11-13 18:04:08,510 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c79f4d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:04:08, skipping insertion in model container [2021-11-13 18:04:08,510 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:04:08" (3/3) ... [2021-11-13 18:04:08,512 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--wireless--mwifiex--mwifiex_usb.ko-entry_point.cil.out.i [2021-11-13 18:04:08,518 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:04:08,518 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:04:08,610 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:04:08,620 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=PETRI_NET, 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 [2021-11-13 18:04:08,620 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:04:08,676 INFO L276 IsEmpty]: Start isEmpty. Operand has 855 states, 631 states have (on average 1.3851030110935023) internal successors, (874), 657 states have internal predecessors, (874), 180 states have call successors, (180), 44 states have call predecessors, (180), 42 states have return successors, (174), 166 states have call predecessors, (174), 174 states have call successors, (174) [2021-11-13 18:04:08,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-13 18:04:08,701 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:04:08,702 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:04:08,706 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:04:08,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:04:08,713 INFO L85 PathProgramCache]: Analyzing trace with hash -967497407, now seen corresponding path program 1 times [2021-11-13 18:04:08,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:04:08,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [918483679] [2021-11-13 18:04:08,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:04:08,734 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:04:08,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:04:08,737 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:04:08,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 18:04:11,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:11,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 1001 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:04:11,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:04:11,843 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 18:04:11,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:04:12,272 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 18:04:12,273 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:04:12,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [918483679] [2021-11-13 18:04:12,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [918483679] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:04:12,275 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:04:12,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 18:04:12,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968194365] [2021-11-13 18:04:12,278 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:04:12,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:04:12,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:04:12,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:04:12,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:04:12,320 INFO L87 Difference]: Start difference. First operand has 855 states, 631 states have (on average 1.3851030110935023) internal successors, (874), 657 states have internal predecessors, (874), 180 states have call successors, (180), 44 states have call predecessors, (180), 42 states have return successors, (174), 166 states have call predecessors, (174), 174 states have call successors, (174) Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-13 18:04:12,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:04:12,779 INFO L93 Difference]: Finished difference Result 1714 states and 2513 transitions. [2021-11-13 18:04:12,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:04:12,783 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 44 [2021-11-13 18:04:12,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:04:12,823 INFO L225 Difference]: With dead ends: 1714 [2021-11-13 18:04:12,824 INFO L226 Difference]: Without dead ends: 848 [2021-11-13 18:04:12,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:04:12,843 INFO L933 BasicCegarLoop]: 1217 mSDtfsCounter, 8 mSDsluCounter, 2431 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 164.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 3648 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 29.93ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 182.74ms IncrementalHoareTripleChecker+Time [2021-11-13 18:04:12,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 3648 Invalid, 25 Unknown, 0 Unchecked, 29.93ms Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 182.74ms Time] [2021-11-13 18:04:12,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2021-11-13 18:04:12,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 848. [2021-11-13 18:04:12,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 631 states have (on average 1.3724247226624406) internal successors, (866), 649 states have internal predecessors, (866), 174 states have call successors, (174), 43 states have call predecessors, (174), 42 states have return successors, (169), 161 states have call predecessors, (169), 169 states have call successors, (169) [2021-11-13 18:04:12,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 1209 transitions. [2021-11-13 18:04:12,992 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 1209 transitions. Word has length 44 [2021-11-13 18:04:12,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:04:12,994 INFO L470 AbstractCegarLoop]: Abstraction has 848 states and 1209 transitions. [2021-11-13 18:04:12,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-13 18:04:12,997 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 1209 transitions. [2021-11-13 18:04:13,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-13 18:04:13,005 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:04:13,006 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-11-13 18:04:13,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:04:13,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:04:13,214 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:04:13,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:04:13,217 INFO L85 PathProgramCache]: Analyzing trace with hash 543306113, now seen corresponding path program 1 times [2021-11-13 18:04:13,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:04:13,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1328092965] [2021-11-13 18:04:13,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:04:13,229 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:04:13,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:04:13,230 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:04:13,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 18:04:15,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:16,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 18:04:16,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:04:16,427 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 18:04:16,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:04:17,238 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 18:04:17,239 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:04:17,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1328092965] [2021-11-13 18:04:17,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1328092965] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:04:17,239 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-13 18:04:17,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-11-13 18:04:17,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184681415] [2021-11-13 18:04:17,240 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-13 18:04:17,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-13 18:04:17,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:04:17,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-13 18:04:17,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:04:17,243 INFO L87 Difference]: Start difference. First operand 848 states and 1209 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-13 18:04:18,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:04:18,145 INFO L93 Difference]: Finished difference Result 1692 states and 2413 transitions. [2021-11-13 18:04:18,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 18:04:18,146 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 46 [2021-11-13 18:04:18,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:04:18,161 INFO L225 Difference]: With dead ends: 1692 [2021-11-13 18:04:18,161 INFO L226 Difference]: Without dead ends: 852 [2021-11-13 18:04:18,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-11-13 18:04:18,168 INFO L933 BasicCegarLoop]: 1200 mSDtfsCounter, 15 mSDsluCounter, 3595 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 433.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 4795 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 30.41ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 479.86ms IncrementalHoareTripleChecker+Time [2021-11-13 18:04:18,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 4795 Invalid, 73 Unknown, 0 Unchecked, 30.41ms Time], IncrementalHoareTripleChecker [14 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 479.86ms Time] [2021-11-13 18:04:18,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2021-11-13 18:04:18,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 852. [2021-11-13 18:04:18,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 635 states have (on average 1.368503937007874) internal successors, (869), 653 states have internal predecessors, (869), 174 states have call successors, (174), 43 states have call predecessors, (174), 42 states have return successors, (169), 161 states have call predecessors, (169), 169 states have call successors, (169) [2021-11-13 18:04:18,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 1212 transitions. [2021-11-13 18:04:18,266 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 1212 transitions. Word has length 46 [2021-11-13 18:04:18,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:04:18,266 INFO L470 AbstractCegarLoop]: Abstraction has 852 states and 1212 transitions. [2021-11-13 18:04:18,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-13 18:04:18,267 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 1212 transitions. [2021-11-13 18:04:18,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-13 18:04:18,273 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:04:18,275 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:04:18,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:04:18,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:04:18,506 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:04:18,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:04:18,506 INFO L85 PathProgramCache]: Analyzing trace with hash 726542785, now seen corresponding path program 2 times [2021-11-13 18:04:18,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:04:18,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [101756444] [2021-11-13 18:04:18,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-13 18:04:18,512 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:04:18,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:04:18,513 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:04:18,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 18:04:21,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-11-13 18:04:21,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-13 18:04:21,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:04:21,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:04:21,329 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 18:04:21,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:04:21,544 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 18:04:21,544 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:04:21,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [101756444] [2021-11-13 18:04:21,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [101756444] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:04:21,545 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:04:21,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 18:04:21,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354860863] [2021-11-13 18:04:21,545 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:04:21,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:04:21,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:04:21,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:04:21,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:04:21,547 INFO L87 Difference]: Start difference. First operand 852 states and 1212 transitions. Second operand has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 18:04:23,738 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:04:27,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:04:27,705 INFO L93 Difference]: Finished difference Result 3232 states and 4619 transitions. [2021-11-13 18:04:27,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:04:27,709 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 48 [2021-11-13 18:04:27,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:04:27,733 INFO L225 Difference]: With dead ends: 3232 [2021-11-13 18:04:27,734 INFO L226 Difference]: Without dead ends: 2399 [2021-11-13 18:04:27,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:04:27,740 INFO L933 BasicCegarLoop]: 1631 mSDtfsCounter, 2998 mSDsluCounter, 1936 mSDsCounter, 0 mSdLazyCounter, 346 mSolverCounterSat, 324 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5441.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2998 SdHoareTripleChecker+Valid, 3567 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 25.97ms SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 346 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5903.59ms IncrementalHoareTripleChecker+Time [2021-11-13 18:04:27,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2998 Valid, 3567 Invalid, 671 Unknown, 0 Unchecked, 25.97ms Time], IncrementalHoareTripleChecker [324 Valid, 346 Invalid, 1 Unknown, 0 Unchecked, 5903.59ms Time] [2021-11-13 18:04:27,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2399 states. [2021-11-13 18:04:27,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2399 to 2399. [2021-11-13 18:04:27,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2399 states, 1784 states have (on average 1.373878923766816) internal successors, (2451), 1830 states have internal predecessors, (2451), 490 states have call successors, (490), 125 states have call predecessors, (490), 124 states have return successors, (485), 461 states have call predecessors, (485), 485 states have call successors, (485) [2021-11-13 18:04:27,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2399 states to 2399 states and 3426 transitions. [2021-11-13 18:04:27,902 INFO L78 Accepts]: Start accepts. Automaton has 2399 states and 3426 transitions. Word has length 48 [2021-11-13 18:04:27,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:04:27,903 INFO L470 AbstractCegarLoop]: Abstraction has 2399 states and 3426 transitions. [2021-11-13 18:04:27,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.25) internal successors, (37), 4 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-11-13 18:04:27,903 INFO L276 IsEmpty]: Start isEmpty. Operand 2399 states and 3426 transitions. [2021-11-13 18:04:27,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-13 18:04:27,906 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:04:27,906 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:04:27,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:04:28,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:04:28,122 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:04:28,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:04:28,122 INFO L85 PathProgramCache]: Analyzing trace with hash 11952355, now seen corresponding path program 1 times [2021-11-13 18:04:28,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:04:28,125 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1566890603] [2021-11-13 18:04:28,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:04:28,125 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:04:28,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:04:28,127 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:04:28,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 18:04:31,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:31,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 1166 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 18:04:31,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:04:31,688 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 18:04:31,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:04:32,557 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 18:04:32,557 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:04:32,557 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1566890603] [2021-11-13 18:04:32,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1566890603] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:04:32,558 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:04:32,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-13 18:04:32,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846042785] [2021-11-13 18:04:32,558 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:04:32,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:04:32,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:04:32,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:04:32,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:04:32,560 INFO L87 Difference]: Start difference. First operand 2399 states and 3426 transitions. Second operand has 8 states, 6 states have (on average 7.666666666666667) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-13 18:04:35,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:04:35,444 INFO L93 Difference]: Finished difference Result 5119 states and 7371 transitions. [2021-11-13 18:04:35,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:04:35,446 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 7.666666666666667) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) Word has length 65 [2021-11-13 18:04:35,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:04:35,476 INFO L225 Difference]: With dead ends: 5119 [2021-11-13 18:04:35,476 INFO L226 Difference]: Without dead ends: 2746 [2021-11-13 18:04:35,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:04:35,490 INFO L933 BasicCegarLoop]: 1679 mSDtfsCounter, 451 mSDsluCounter, 9503 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2426.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 11182 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 91.00ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 2533.89ms IncrementalHoareTripleChecker+Time [2021-11-13 18:04:35,491 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [538 Valid, 11182 Invalid, 290 Unknown, 0 Unchecked, 91.00ms Time], IncrementalHoareTripleChecker [0 Valid, 224 Invalid, 0 Unknown, 66 Unchecked, 2533.89ms Time] [2021-11-13 18:04:35,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2746 states. [2021-11-13 18:04:35,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2746 to 2399. [2021-11-13 18:04:35,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2399 states, 1784 states have (on average 1.3733183856502242) internal successors, (2450), 1830 states have internal predecessors, (2450), 490 states have call successors, (490), 125 states have call predecessors, (490), 124 states have return successors, (485), 461 states have call predecessors, (485), 485 states have call successors, (485) [2021-11-13 18:04:35,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2399 states to 2399 states and 3425 transitions. [2021-11-13 18:04:35,690 INFO L78 Accepts]: Start accepts. Automaton has 2399 states and 3425 transitions. Word has length 65 [2021-11-13 18:04:35,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:04:35,691 INFO L470 AbstractCegarLoop]: Abstraction has 2399 states and 3425 transitions. [2021-11-13 18:04:35,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 7.666666666666667) internal successors, (46), 7 states have internal predecessors, (46), 4 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 3 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-13 18:04:35,691 INFO L276 IsEmpty]: Start isEmpty. Operand 2399 states and 3425 transitions. [2021-11-13 18:04:35,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-13 18:04:35,694 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:04:35,695 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:04:35,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:04:35,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:04:35,910 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:04:35,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:04:35,910 INFO L85 PathProgramCache]: Analyzing trace with hash 230807073, now seen corresponding path program 1 times [2021-11-13 18:04:35,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:04:35,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [544319067] [2021-11-13 18:04:35,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:04:35,916 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:04:35,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:04:35,917 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:04:35,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 18:04:38,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:38,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 1166 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:04:38,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:04:40,375 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 18:04:40,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:04:40,979 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 18:04:40,980 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:04:40,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [544319067] [2021-11-13 18:04:40,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [544319067] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:04:40,980 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:04:40,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 4 [2021-11-13 18:04:40,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989894358] [2021-11-13 18:04:40,981 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:04:40,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:04:40,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:04:40,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:04:40,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:04:40,982 INFO L87 Difference]: Start difference. First operand 2399 states and 3425 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 18:04:42,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:04:42,619 INFO L93 Difference]: Finished difference Result 7146 states and 10414 transitions. [2021-11-13 18:04:42,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:04:42,625 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 65 [2021-11-13 18:04:42,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:04:42,665 INFO L225 Difference]: With dead ends: 7146 [2021-11-13 18:04:42,665 INFO L226 Difference]: Without dead ends: 4773 [2021-11-13 18:04:42,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:04:42,678 INFO L933 BasicCegarLoop]: 1433 mSDtfsCounter, 2006 mSDsluCounter, 1176 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1192.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2006 SdHoareTripleChecker+Valid, 2609 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.69ms SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1398.83ms IncrementalHoareTripleChecker+Time [2021-11-13 18:04:42,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2006 Valid, 2609 Invalid, 383 Unknown, 0 Unchecked, 14.69ms Time], IncrementalHoareTripleChecker [363 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 1398.83ms Time] [2021-11-13 18:04:42,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4773 states. [2021-11-13 18:04:42,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4773 to 4761. [2021-11-13 18:04:42,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4761 states, 3544 states have (on average 1.3733069977426637) internal successors, (4867), 3632 states have internal predecessors, (4867), 970 states have call successors, (970), 247 states have call predecessors, (970), 246 states have return successors, (1044), 917 states have call predecessors, (1044), 965 states have call successors, (1044) [2021-11-13 18:04:42,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4761 states to 4761 states and 6881 transitions. [2021-11-13 18:04:42,960 INFO L78 Accepts]: Start accepts. Automaton has 4761 states and 6881 transitions. Word has length 65 [2021-11-13 18:04:42,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:04:42,964 INFO L470 AbstractCegarLoop]: Abstraction has 4761 states and 6881 transitions. [2021-11-13 18:04:42,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 18:04:42,964 INFO L276 IsEmpty]: Start isEmpty. Operand 4761 states and 6881 transitions. [2021-11-13 18:04:42,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-13 18:04:42,969 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:04:42,969 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:04:43,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:04:43,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:04:43,185 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:04:43,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:04:43,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1435282055, now seen corresponding path program 1 times [2021-11-13 18:04:43,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:04:43,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1932780707] [2021-11-13 18:04:43,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:04:43,189 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:04:43,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:04:43,191 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:04:43,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 18:04:45,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:45,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 1167 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:04:45,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:04:47,307 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 18:04:47,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:04:47,865 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 18:04:47,865 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:04:47,865 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1932780707] [2021-11-13 18:04:47,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1932780707] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:04:47,866 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:04:47,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 4 [2021-11-13 18:04:47,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990851907] [2021-11-13 18:04:47,866 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:04:47,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:04:47,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:04:47,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:04:47,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:04:47,868 INFO L87 Difference]: Start difference. First operand 4761 states and 6881 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 18:04:53,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:04:53,040 INFO L93 Difference]: Finished difference Result 18916 states and 27976 transitions. [2021-11-13 18:04:53,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:04:53,042 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 66 [2021-11-13 18:04:53,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:04:53,180 INFO L225 Difference]: With dead ends: 18916 [2021-11-13 18:04:53,180 INFO L226 Difference]: Without dead ends: 14181 [2021-11-13 18:04:53,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:04:53,218 INFO L933 BasicCegarLoop]: 1547 mSDtfsCounter, 3127 mSDsluCounter, 2000 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 363 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4136.64ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3127 SdHoareTripleChecker+Valid, 3547 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.34ms SdHoareTripleChecker+Time, 363 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4626.89ms IncrementalHoareTripleChecker+Time [2021-11-13 18:04:53,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3127 Valid, 3547 Invalid, 715 Unknown, 0 Unchecked, 17.34ms Time], IncrementalHoareTripleChecker [363 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 4626.89ms Time] [2021-11-13 18:04:53,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14181 states. [2021-11-13 18:04:54,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14181 to 14152. [2021-11-13 18:04:54,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14152 states, 10533 states have (on average 1.3706446406531851) internal successors, (14437), 10791 states have internal predecessors, (14437), 2884 states have call successors, (2884), 735 states have call predecessors, (2884), 734 states have return successors, (3281), 2733 states have call predecessors, (3281), 2879 states have call successors, (3281) [2021-11-13 18:04:54,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14152 states to 14152 states and 20602 transitions. [2021-11-13 18:04:54,223 INFO L78 Accepts]: Start accepts. Automaton has 14152 states and 20602 transitions. Word has length 66 [2021-11-13 18:04:54,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:04:54,223 INFO L470 AbstractCegarLoop]: Abstraction has 14152 states and 20602 transitions. [2021-11-13 18:04:54,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 3 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 18:04:54,225 INFO L276 IsEmpty]: Start isEmpty. Operand 14152 states and 20602 transitions. [2021-11-13 18:04:54,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-13 18:04:54,228 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:04:54,228 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:04:54,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 18:04:54,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:04:54,451 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:04:54,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:04:54,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1544432604, now seen corresponding path program 1 times [2021-11-13 18:04:54,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:04:54,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1826386069] [2021-11-13 18:04:54,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:04:54,454 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:04:54,455 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:04:54,456 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:04:54,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 18:04:57,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:04:57,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 1168 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:04:57,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:04:58,177 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 18:04:58,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:04:58,617 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 18:04:58,617 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:04:58,618 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1826386069] [2021-11-13 18:04:58,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1826386069] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:04:58,618 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:04:58,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-13 18:04:58,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070813157] [2021-11-13 18:04:58,618 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:04:58,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:04:58,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:04:58,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:04:58,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:04:58,620 INFO L87 Difference]: Start difference. First operand 14152 states and 20602 transitions. Second operand has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-13 18:04:59,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:04:59,046 INFO L93 Difference]: Finished difference Result 14176 states and 20626 transitions. [2021-11-13 18:04:59,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:04:59,047 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 67 [2021-11-13 18:04:59,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:04:59,140 INFO L225 Difference]: With dead ends: 14176 [2021-11-13 18:04:59,140 INFO L226 Difference]: Without dead ends: 14173 [2021-11-13 18:04:59,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:04:59,156 INFO L933 BasicCegarLoop]: 1385 mSDtfsCounter, 1156 mSDsluCounter, 1173 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.49ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1156 SdHoareTripleChecker+Valid, 2558 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.57ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 42.43ms IncrementalHoareTripleChecker+Time [2021-11-13 18:04:59,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1156 Valid, 2558 Invalid, 9 Unknown, 0 Unchecked, 5.57ms Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 42.43ms Time] [2021-11-13 18:04:59,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14173 states. [2021-11-13 18:04:59,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14173 to 14170. [2021-11-13 18:04:59,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14170 states, 10551 states have (on average 1.3701070988531894) internal successors, (14456), 10807 states have internal predecessors, (14456), 2884 states have call successors, (2884), 735 states have call predecessors, (2884), 734 states have return successors, (3281), 2735 states have call predecessors, (3281), 2879 states have call successors, (3281) [2021-11-13 18:05:00,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14170 states to 14170 states and 20621 transitions. [2021-11-13 18:05:00,057 INFO L78 Accepts]: Start accepts. Automaton has 14170 states and 20621 transitions. Word has length 67 [2021-11-13 18:05:00,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:00,057 INFO L470 AbstractCegarLoop]: Abstraction has 14170 states and 20621 transitions. [2021-11-13 18:05:00,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.0) internal successors, (51), 3 states have internal predecessors, (51), 2 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-13 18:05:00,058 INFO L276 IsEmpty]: Start isEmpty. Operand 14170 states and 20621 transitions. [2021-11-13 18:05:00,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-13 18:05:00,061 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:00,061 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:05:00,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-11-13 18:05:00,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:05:00,285 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:05:00,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:00,286 INFO L85 PathProgramCache]: Analyzing trace with hash -633127460, now seen corresponding path program 1 times [2021-11-13 18:05:00,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:05:00,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [100595713] [2021-11-13 18:05:00,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:00,289 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:05:00,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:05:00,290 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:05:00,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 18:05:02,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:03,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 1169 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:05:03,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:05:03,782 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 18:05:03,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:05:04,212 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 18:05:04,212 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:05:04,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [100595713] [2021-11-13 18:05:04,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [100595713] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:05:04,213 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:05:04,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-13 18:05:04,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015347955] [2021-11-13 18:05:04,213 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:05:04,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:05:04,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:05:04,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:05:04,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:05:04,215 INFO L87 Difference]: Start difference. First operand 14170 states and 20621 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-13 18:05:04,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:04,657 INFO L93 Difference]: Finished difference Result 14172 states and 20622 transitions. [2021-11-13 18:05:04,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:05:04,658 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 68 [2021-11-13 18:05:04,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:04,737 INFO L225 Difference]: With dead ends: 14172 [2021-11-13 18:05:04,737 INFO L226 Difference]: Without dead ends: 14169 [2021-11-13 18:05:04,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:05:04,748 INFO L933 BasicCegarLoop]: 1197 mSDtfsCounter, 1145 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 1 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1145 SdHoareTripleChecker+Valid, 1197 SdHoareTripleChecker+Invalid, 1 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.29ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.14ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:04,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1145 Valid, 1197 Invalid, 1 Unknown, 0 Unchecked, 2.29ms Time], IncrementalHoareTripleChecker [0 Valid, 1 Invalid, 0 Unknown, 0 Unchecked, 4.14ms Time] [2021-11-13 18:05:04,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14169 states. [2021-11-13 18:05:05,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14169 to 14169. [2021-11-13 18:05:05,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14169 states, 10551 states have (on average 1.370012321107004) internal successors, (14455), 10806 states have internal predecessors, (14455), 2883 states have call successors, (2883), 735 states have call predecessors, (2883), 734 states have return successors, (3281), 2735 states have call predecessors, (3281), 2879 states have call successors, (3281) [2021-11-13 18:05:05,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14169 states to 14169 states and 20619 transitions. [2021-11-13 18:05:05,734 INFO L78 Accepts]: Start accepts. Automaton has 14169 states and 20619 transitions. Word has length 68 [2021-11-13 18:05:05,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:05,736 INFO L470 AbstractCegarLoop]: Abstraction has 14169 states and 20619 transitions. [2021-11-13 18:05:05,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 2 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-13 18:05:05,736 INFO L276 IsEmpty]: Start isEmpty. Operand 14169 states and 20619 transitions. [2021-11-13 18:05:05,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-13 18:05:05,739 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:05,739 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:05:05,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 18:05:05,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:05:05,966 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:05:05,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:05,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1847533095, now seen corresponding path program 1 times [2021-11-13 18:05:05,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:05:05,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2088637688] [2021-11-13 18:05:05,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:05,969 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:05:05,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:05:05,970 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:05:05,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 18:05:08,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:08,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 1170 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:05:08,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:05:09,178 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 18:05:09,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:05:09,599 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 18:05:09,599 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:05:09,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2088637688] [2021-11-13 18:05:09,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2088637688] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:05:09,599 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:05:09,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-13 18:05:09,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393664562] [2021-11-13 18:05:09,600 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:05:09,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:05:09,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:05:09,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:05:09,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:05:09,601 INFO L87 Difference]: Start difference. First operand 14169 states and 20619 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-13 18:05:10,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:10,114 INFO L93 Difference]: Finished difference Result 14171 states and 20620 transitions. [2021-11-13 18:05:10,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:05:10,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 69 [2021-11-13 18:05:10,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:10,193 INFO L225 Difference]: With dead ends: 14171 [2021-11-13 18:05:10,193 INFO L226 Difference]: Without dead ends: 14139 [2021-11-13 18:05:10,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:05:10,205 INFO L933 BasicCegarLoop]: 1196 mSDtfsCounter, 1142 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1142 SdHoareTripleChecker+Valid, 1196 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.02ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:10,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1142 Valid, 1196 Invalid, 0 Unknown, 0 Unchecked, 8.02ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 18:05:10,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14139 states. [2021-11-13 18:05:11,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14139 to 14139. [2021-11-13 18:05:11,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14139 states, 10524 states have (on average 1.3699163816039528) internal successors, (14417), 10778 states have internal predecessors, (14417), 2880 states have call successors, (2880), 735 states have call predecessors, (2880), 734 states have return successors, (3276), 2733 states have call predecessors, (3276), 2877 states have call successors, (3276) [2021-11-13 18:05:11,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14139 states to 14139 states and 20573 transitions. [2021-11-13 18:05:11,091 INFO L78 Accepts]: Start accepts. Automaton has 14139 states and 20573 transitions. Word has length 69 [2021-11-13 18:05:11,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:11,092 INFO L470 AbstractCegarLoop]: Abstraction has 14139 states and 20573 transitions. [2021-11-13 18:05:11,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 2 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2021-11-13 18:05:11,092 INFO L276 IsEmpty]: Start isEmpty. Operand 14139 states and 20573 transitions. [2021-11-13 18:05:11,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-13 18:05:11,105 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:11,105 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2021-11-13 18:05:11,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 18:05:11,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:05:11,329 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:05:11,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:11,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1553347695, now seen corresponding path program 1 times [2021-11-13 18:05:11,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:05:11,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [446366293] [2021-11-13 18:05:11,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:11,334 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:05:11,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:05:11,335 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:05:11,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 18:05:13,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:14,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 1269 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:05:14,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:05:14,536 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 18:05:14,536 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:05:14,883 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 18:05:14,884 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:05:14,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [446366293] [2021-11-13 18:05:14,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [446366293] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:05:14,884 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:05:14,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 18:05:14,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775307394] [2021-11-13 18:05:14,884 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:05:14,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:05:14,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:05:14,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:05:14,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:05:14,886 INFO L87 Difference]: Start difference. First operand 14139 states and 20573 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 18:05:16,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:16,137 INFO L93 Difference]: Finished difference Result 38561 states and 55724 transitions. [2021-11-13 18:05:16,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:05:16,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 102 [2021-11-13 18:05:16,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:16,274 INFO L225 Difference]: With dead ends: 38561 [2021-11-13 18:05:16,274 INFO L226 Difference]: Without dead ends: 24448 [2021-11-13 18:05:16,348 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:05:16,348 INFO L933 BasicCegarLoop]: 1603 mSDtfsCounter, 872 mSDsluCounter, 1149 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 430.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 872 SdHoareTripleChecker+Valid, 2752 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 3.96ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 486.91ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:16,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [872 Valid, 2752 Invalid, 32 Unknown, 0 Unchecked, 3.96ms Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 486.91ms Time] [2021-11-13 18:05:16,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24448 states. [2021-11-13 18:05:17,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24448 to 24400. [2021-11-13 18:05:17,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24400 states, 18069 states have (on average 1.3602855719740994) internal successors, (24579), 18544 states have internal predecessors, (24579), 4942 states have call successors, (4942), 1389 states have call predecessors, (4942), 1388 states have return successors, (5593), 4664 states have call predecessors, (5593), 4939 states have call successors, (5593) [2021-11-13 18:05:18,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24400 states to 24400 states and 35114 transitions. [2021-11-13 18:05:18,082 INFO L78 Accepts]: Start accepts. Automaton has 24400 states and 35114 transitions. Word has length 102 [2021-11-13 18:05:18,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:18,082 INFO L470 AbstractCegarLoop]: Abstraction has 24400 states and 35114 transitions. [2021-11-13 18:05:18,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 18:05:18,083 INFO L276 IsEmpty]: Start isEmpty. Operand 24400 states and 35114 transitions. [2021-11-13 18:05:18,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-13 18:05:18,101 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:18,101 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 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] [2021-11-13 18:05:18,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 18:05:18,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:05:18,325 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:05:18,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:18,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1390336057, now seen corresponding path program 1 times [2021-11-13 18:05:18,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:05:18,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1297815937] [2021-11-13 18:05:18,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:18,331 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:05:18,331 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:05:18,332 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:05:18,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 18:05:21,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:21,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 1338 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:05:21,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:05:22,124 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-13 18:05:22,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:05:22,584 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-13 18:05:22,585 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:05:22,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1297815937] [2021-11-13 18:05:22,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1297815937] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:05:22,585 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:05:22,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-13 18:05:22,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562491818] [2021-11-13 18:05:22,585 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:05:22,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:05:22,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:05:22,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:05:22,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:05:22,587 INFO L87 Difference]: Start difference. First operand 24400 states and 35114 transitions. Second operand has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-13 18:05:24,773 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:05:26,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:26,954 INFO L93 Difference]: Finished difference Result 42667 states and 61279 transitions. [2021-11-13 18:05:26,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:05:26,955 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 128 [2021-11-13 18:05:26,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:27,054 INFO L225 Difference]: With dead ends: 42667 [2021-11-13 18:05:27,054 INFO L226 Difference]: Without dead ends: 18283 [2021-11-13 18:05:27,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 251 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:05:27,131 INFO L933 BasicCegarLoop]: 1194 mSDtfsCounter, 38 mSDsluCounter, 3573 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3286.16ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 4767 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.94ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3387.25ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:27,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 4767 Invalid, 24 Unknown, 0 Unchecked, 4.94ms Time], IncrementalHoareTripleChecker [6 Valid, 17 Invalid, 1 Unknown, 0 Unchecked, 3387.25ms Time] [2021-11-13 18:05:27,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18283 states. [2021-11-13 18:05:28,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18283 to 18108. [2021-11-13 18:05:28,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18108 states, 13406 states have (on average 1.3575264806802925) internal successors, (18199), 13764 states have internal predecessors, (18199), 3652 states have call successors, (3652), 1050 states have call predecessors, (3652), 1049 states have return successors, (4099), 3440 states have call predecessors, (4099), 3649 states have call successors, (4099) [2021-11-13 18:05:28,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18108 states to 18108 states and 25950 transitions. [2021-11-13 18:05:28,480 INFO L78 Accepts]: Start accepts. Automaton has 18108 states and 25950 transitions. Word has length 128 [2021-11-13 18:05:28,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:28,481 INFO L470 AbstractCegarLoop]: Abstraction has 18108 states and 25950 transitions. [2021-11-13 18:05:28,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.2) internal successors, (101), 5 states have internal predecessors, (101), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-13 18:05:28,481 INFO L276 IsEmpty]: Start isEmpty. Operand 18108 states and 25950 transitions. [2021-11-13 18:05:28,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-13 18:05:28,506 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:28,506 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:05:28,548 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-13 18:05:28,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:05:28,721 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:05:28,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:28,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1851619390, now seen corresponding path program 1 times [2021-11-13 18:05:28,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:05:28,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1940305046] [2021-11-13 18:05:28,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:28,726 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:05:28,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:05:28,728 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:05:28,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 18:05:31,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:31,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 1359 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-13 18:05:31,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:05:32,361 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-11-13 18:05:32,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:05:33,348 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-13 18:05:33,349 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:05:33,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1940305046] [2021-11-13 18:05:33,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1940305046] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:05:33,349 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:05:33,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 8 [2021-11-13 18:05:33,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453300163] [2021-11-13 18:05:33,350 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:05:33,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:05:33,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:05:33,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:05:33,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:05:33,352 INFO L87 Difference]: Start difference. First operand 18108 states and 25950 transitions. Second operand has 8 states, 6 states have (on average 18.0) internal successors, (108), 7 states have internal predecessors, (108), 4 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 3 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-13 18:05:36,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:36,076 INFO L93 Difference]: Finished difference Result 34562 states and 49576 transitions. [2021-11-13 18:05:36,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:05:36,077 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 18.0) internal successors, (108), 7 states have internal predecessors, (108), 4 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 3 states have call predecessors, (18), 4 states have call successors, (18) Word has length 134 [2021-11-13 18:05:36,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:36,162 INFO L225 Difference]: With dead ends: 34562 [2021-11-13 18:05:36,162 INFO L226 Difference]: Without dead ends: 18129 [2021-11-13 18:05:36,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 259 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:05:36,218 INFO L933 BasicCegarLoop]: 1444 mSDtfsCounter, 435 mSDsluCounter, 5234 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1685.08ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 520 SdHoareTripleChecker+Valid, 6678 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.22ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 1766.08ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:36,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [520 Valid, 6678 Invalid, 177 Unknown, 0 Unchecked, 13.22ms Time], IncrementalHoareTripleChecker [1 Valid, 116 Invalid, 0 Unknown, 60 Unchecked, 1766.08ms Time] [2021-11-13 18:05:36,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18129 states. [2021-11-13 18:05:37,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18129 to 18108. [2021-11-13 18:05:37,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18108 states, 13406 states have (on average 1.357078919886618) internal successors, (18193), 13764 states have internal predecessors, (18193), 3652 states have call successors, (3652), 1050 states have call predecessors, (3652), 1049 states have return successors, (4099), 3440 states have call predecessors, (4099), 3649 states have call successors, (4099) [2021-11-13 18:05:37,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18108 states to 18108 states and 25944 transitions. [2021-11-13 18:05:37,690 INFO L78 Accepts]: Start accepts. Automaton has 18108 states and 25944 transitions. Word has length 134 [2021-11-13 18:05:37,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:37,691 INFO L470 AbstractCegarLoop]: Abstraction has 18108 states and 25944 transitions. [2021-11-13 18:05:37,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 18.0) internal successors, (108), 7 states have internal predecessors, (108), 4 states have call successors, (19), 2 states have call predecessors, (19), 4 states have return successors, (18), 3 states have call predecessors, (18), 4 states have call successors, (18) [2021-11-13 18:05:37,691 INFO L276 IsEmpty]: Start isEmpty. Operand 18108 states and 25944 transitions. [2021-11-13 18:05:37,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-13 18:05:37,708 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:37,709 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:05:37,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-13 18:05:37,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:05:37,933 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:05:37,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:37,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1774718592, now seen corresponding path program 1 times [2021-11-13 18:05:37,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:05:37,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1918452094] [2021-11-13 18:05:37,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:37,937 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:05:37,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:05:37,938 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:05:37,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-13 18:05:40,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:40,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 1359 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-13 18:05:40,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:05:41,396 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-13 18:05:41,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:05:42,271 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-13 18:05:42,271 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:05:42,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1918452094] [2021-11-13 18:05:42,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1918452094] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:05:42,272 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:05:42,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-13 18:05:42,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719271815] [2021-11-13 18:05:42,272 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:05:42,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:05:42,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:05:42,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:05:42,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:05:42,275 INFO L87 Difference]: Start difference. First operand 18108 states and 25944 transitions. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 6 states have internal predecessors, (94), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 6 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-13 18:05:43,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:43,343 INFO L93 Difference]: Finished difference Result 34727 states and 50029 transitions. [2021-11-13 18:05:43,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:05:43,344 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 6 states have internal predecessors, (94), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 6 states have call predecessors, (14), 3 states have call successors, (14) Word has length 134 [2021-11-13 18:05:43,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:43,450 INFO L225 Difference]: With dead ends: 34727 [2021-11-13 18:05:43,451 INFO L226 Difference]: Without dead ends: 18294 [2021-11-13 18:05:43,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:05:43,505 INFO L933 BasicCegarLoop]: 1202 mSDtfsCounter, 9 mSDsluCounter, 3594 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 77.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 4796 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.05ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 93.91ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:43,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 4796 Invalid, 13 Unknown, 0 Unchecked, 10.05ms Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 93.91ms Time] [2021-11-13 18:05:43,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18294 states. [2021-11-13 18:05:44,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18294 to 18210. [2021-11-13 18:05:44,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18210 states, 13478 states have (on average 1.3560617302270366) internal successors, (18277), 13842 states have internal predecessors, (18277), 3664 states have call successors, (3664), 1050 states have call predecessors, (3664), 1067 states have return successors, (4219), 3464 states have call predecessors, (4219), 3661 states have call successors, (4219) [2021-11-13 18:05:44,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18210 states to 18210 states and 26160 transitions. [2021-11-13 18:05:44,782 INFO L78 Accepts]: Start accepts. Automaton has 18210 states and 26160 transitions. Word has length 134 [2021-11-13 18:05:44,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:44,783 INFO L470 AbstractCegarLoop]: Abstraction has 18210 states and 26160 transitions. [2021-11-13 18:05:44,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 6 states have internal predecessors, (94), 4 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (14), 6 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-13 18:05:44,783 INFO L276 IsEmpty]: Start isEmpty. Operand 18210 states and 26160 transitions. [2021-11-13 18:05:44,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-13 18:05:44,802 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:44,802 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:05:44,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-13 18:05:45,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:05:45,018 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:05:45,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:45,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1437416734, now seen corresponding path program 1 times [2021-11-13 18:05:45,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:05:45,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1890202525] [2021-11-13 18:05:45,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:45,022 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:05:45,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:05:45,025 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:05:45,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 18:05:47,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:47,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 1428 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:05:47,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:05:48,467 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-13 18:05:48,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:05:48,998 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-13 18:05:48,998 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:05:48,998 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1890202525] [2021-11-13 18:05:48,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1890202525] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:05:48,999 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:05:48,999 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 18:05:48,999 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976460831] [2021-11-13 18:05:48,999 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:05:49,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:05:49,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:05:49,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:05:49,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:05:49,000 INFO L87 Difference]: Start difference. First operand 18210 states and 26160 transitions. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-13 18:05:50,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:05:50,397 INFO L93 Difference]: Finished difference Result 44292 states and 63625 transitions. [2021-11-13 18:05:50,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:05:50,398 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), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) Word has length 138 [2021-11-13 18:05:50,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:05:50,526 INFO L225 Difference]: With dead ends: 44292 [2021-11-13 18:05:50,527 INFO L226 Difference]: Without dead ends: 25718 [2021-11-13 18:05:50,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:05:50,583 INFO L933 BasicCegarLoop]: 1748 mSDtfsCounter, 897 mSDsluCounter, 1154 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 280.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 897 SdHoareTripleChecker+Valid, 2902 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.08ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 348.54ms IncrementalHoareTripleChecker+Time [2021-11-13 18:05:50,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [897 Valid, 2902 Invalid, 25 Unknown, 0 Unchecked, 5.08ms Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 348.54ms Time] [2021-11-13 18:05:50,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25718 states. [2021-11-13 18:05:51,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25718 to 25518. [2021-11-13 18:05:51,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25518 states, 18954 states have (on average 1.3580774506700433) internal successors, (25741), 19478 states have internal predecessors, (25741), 5026 states have call successors, (5026), 1502 states have call predecessors, (5026), 1537 states have return successors, (5928), 4715 states have call predecessors, (5928), 5023 states have call successors, (5928) [2021-11-13 18:05:52,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25518 states to 25518 states and 36695 transitions. [2021-11-13 18:05:52,034 INFO L78 Accepts]: Start accepts. Automaton has 25518 states and 36695 transitions. Word has length 138 [2021-11-13 18:05:52,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:05:52,035 INFO L470 AbstractCegarLoop]: Abstraction has 25518 states and 36695 transitions. [2021-11-13 18:05:52,035 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), 2 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (24), 2 states have call predecessors, (24), 2 states have call successors, (24) [2021-11-13 18:05:52,035 INFO L276 IsEmpty]: Start isEmpty. Operand 25518 states and 36695 transitions. [2021-11-13 18:05:52,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-13 18:05:52,053 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:52,054 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:05:52,097 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-13 18:05:52,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:05:52,277 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:05:52,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:52,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1581890694, now seen corresponding path program 1 times [2021-11-13 18:05:52,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:05:52,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [437907631] [2021-11-13 18:05:52,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:52,281 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:05:52,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:05:52,282 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:05:52,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-13 18:05:55,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:55,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 1374 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-13 18:05:55,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:05:56,709 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-13 18:05:56,709 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:05:59,023 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-13 18:05:59,023 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:05:59,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [437907631] [2021-11-13 18:05:59,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [437907631] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:05:59,024 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:05:59,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13, 13] imperfect sequences [] total 14 [2021-11-13 18:05:59,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402333602] [2021-11-13 18:05:59,025 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:05:59,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 18:05:59,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:05:59,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 18:05:59,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:05:59,027 INFO L87 Difference]: Start difference. First operand 25518 states and 36695 transitions. Second operand has 14 states, 14 states have (on average 6.714285714285714) internal successors, (94), 11 states have internal predecessors, (94), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 18:06:01,208 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:06:13,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:06:13,392 INFO L93 Difference]: Finished difference Result 60048 states and 88099 transitions. [2021-11-13 18:06:13,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-13 18:06:13,393 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 6.714285714285714) internal successors, (94), 11 states have internal predecessors, (94), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 2 states have call successors, (13) Word has length 140 [2021-11-13 18:06:13,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:06:13,561 INFO L225 Difference]: With dead ends: 60048 [2021-11-13 18:06:13,561 INFO L226 Difference]: Without dead ends: 34575 [2021-11-13 18:06:13,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2021-11-13 18:06:13,649 INFO L933 BasicCegarLoop]: 2341 mSDtfsCounter, 2564 mSDsluCounter, 22757 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 211 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9999.11ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2651 SdHoareTripleChecker+Valid, 25098 SdHoareTripleChecker+Invalid, 1176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 61.40ms SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10703.34ms IncrementalHoareTripleChecker+Time [2021-11-13 18:06:13,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2651 Valid, 25098 Invalid, 1176 Unknown, 0 Unchecked, 61.40ms Time], IncrementalHoareTripleChecker [211 Valid, 964 Invalid, 1 Unknown, 0 Unchecked, 10703.34ms Time] [2021-11-13 18:06:13,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34575 states. [2021-11-13 18:06:15,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34575 to 25482. [2021-11-13 18:06:15,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25482 states, 18918 states have (on average 1.3567501850089863) internal successors, (25667), 19444 states have internal predecessors, (25667), 5026 states have call successors, (5026), 1502 states have call predecessors, (5026), 1537 states have return successors, (5928), 4713 states have call predecessors, (5928), 5023 states have call successors, (5928) [2021-11-13 18:06:15,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25482 states to 25482 states and 36621 transitions. [2021-11-13 18:06:15,646 INFO L78 Accepts]: Start accepts. Automaton has 25482 states and 36621 transitions. Word has length 140 [2021-11-13 18:06:15,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:06:15,647 INFO L470 AbstractCegarLoop]: Abstraction has 25482 states and 36621 transitions. [2021-11-13 18:06:15,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 6.714285714285714) internal successors, (94), 11 states have internal predecessors, (94), 3 states have call successors, (14), 2 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 18:06:15,647 INFO L276 IsEmpty]: Start isEmpty. Operand 25482 states and 36621 transitions. [2021-11-13 18:06:15,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2021-11-13 18:06:15,664 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:06:15,664 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:06:15,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-13 18:06:15,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:06:15,890 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:06:15,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:06:15,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1703720375, now seen corresponding path program 1 times [2021-11-13 18:06:15,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:06:15,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1950559115] [2021-11-13 18:06:15,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:06:15,892 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:06:15,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:06:15,893 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:06:15,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-13 18:06:18,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:18,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 1441 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:06:18,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:06:19,124 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-13 18:06:19,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:06:19,544 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-13 18:06:19,545 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:06:19,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1950559115] [2021-11-13 18:06:19,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1950559115] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:06:19,545 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:06:19,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-13 18:06:19,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921862414] [2021-11-13 18:06:19,545 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:06:19,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:06:19,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:06:19,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:06:19,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:06:19,547 INFO L87 Difference]: Start difference. First operand 25482 states and 36621 transitions. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-13 18:06:25,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:06:25,162 INFO L93 Difference]: Finished difference Result 95181 states and 143928 transitions. [2021-11-13 18:06:25,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:06:25,163 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 161 [2021-11-13 18:06:25,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:06:25,477 INFO L225 Difference]: With dead ends: 95181 [2021-11-13 18:06:25,478 INFO L226 Difference]: Without dead ends: 69744 [2021-11-13 18:06:25,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:06:25,747 INFO L933 BasicCegarLoop]: 2283 mSDtfsCounter, 3468 mSDsluCounter, 4763 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 663 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2244.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3692 SdHoareTripleChecker+Valid, 7046 SdHoareTripleChecker+Invalid, 1029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 17.86ms SdHoareTripleChecker+Time, 663 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2478.45ms IncrementalHoareTripleChecker+Time [2021-11-13 18:06:25,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3692 Valid, 7046 Invalid, 1029 Unknown, 0 Unchecked, 17.86ms Time], IncrementalHoareTripleChecker [663 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 2478.45ms Time] [2021-11-13 18:06:25,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69744 states. [2021-11-13 18:06:27,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69744 to 25530. [2021-11-13 18:06:27,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25530 states, 18966 states have (on average 1.3558473057049456) internal successors, (25715), 19492 states have internal predecessors, (25715), 5026 states have call successors, (5026), 1502 states have call predecessors, (5026), 1537 states have return successors, (5928), 4713 states have call predecessors, (5928), 5023 states have call successors, (5928) [2021-11-13 18:06:28,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25530 states to 25530 states and 36669 transitions. [2021-11-13 18:06:28,095 INFO L78 Accepts]: Start accepts. Automaton has 25530 states and 36669 transitions. Word has length 161 [2021-11-13 18:06:28,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:06:28,096 INFO L470 AbstractCegarLoop]: Abstraction has 25530 states and 36669 transitions. [2021-11-13 18:06:28,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 2 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-13 18:06:28,097 INFO L276 IsEmpty]: Start isEmpty. Operand 25530 states and 36669 transitions. [2021-11-13 18:06:28,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-13 18:06:28,113 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:06:28,113 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:06:28,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-13 18:06:28,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:06:28,331 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:06:28,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:06:28,332 INFO L85 PathProgramCache]: Analyzing trace with hash 436590142, now seen corresponding path program 1 times [2021-11-13 18:06:28,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:06:28,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [516507210] [2021-11-13 18:06:28,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:06:28,335 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:06:28,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:06:28,336 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:06:28,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8ef001b1-94e2-4ce5-a149-9818a51e6261/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process