./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.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_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/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_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/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_e8aca4cb-9219-454e-8bda-2c0941af4ac5/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 e3555fedd9f92961bad45780711b37c7eb42c00277e0bac6769cfc03eaec14a8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:05:04,485 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:05:04,487 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:05:04,522 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:05:04,523 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:05:04,524 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:05:04,526 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:05:04,529 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:05:04,531 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:05:04,532 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:05:04,534 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:05:04,535 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:05:04,536 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:05:04,537 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:05:04,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:05:04,541 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:05:04,542 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:05:04,543 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:05:04,546 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:05:04,549 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:05:04,551 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:05:04,553 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:05:04,555 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:05:04,556 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:05:04,560 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:05:04,561 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:05:04,561 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:05:04,563 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:05:04,563 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:05:04,565 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:05:04,565 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:05:04,567 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:05:04,568 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:05:04,569 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:05:04,570 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:05:04,571 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:05:04,572 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:05:04,572 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:05:04,573 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:05:04,574 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:05:04,575 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:05:04,576 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-11-13 18:05:04,605 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:05:04,606 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:05:04,606 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:05:04,607 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:05:04,618 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:05:04,618 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:05:04,619 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:05:04,620 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:05:04,620 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:05:04,620 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:05:04,621 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:05:04,622 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:05:04,622 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:05:04,622 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:05:04,622 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:05:04,623 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:05:04,623 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:05:04,623 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:05:04,624 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:05:04,624 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:05:04,624 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:05:04,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:05:04,625 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:05:04,625 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:05:04,626 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:05:04,626 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:05:04,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:05:04,626 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:05:04,627 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:05:04,627 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:05:04,627 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:05:04,628 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_e8aca4cb-9219-454e-8bda-2c0941af4ac5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e3555fedd9f92961bad45780711b37c7eb42c00277e0bac6769cfc03eaec14a8 [2021-11-13 18:05:04,968 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:05:04,996 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:05:04,999 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:05:05,000 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:05:05,001 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:05:05,003 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i [2021-11-13 18:05:05,091 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/data/3136ab840/d0495425c83a459584acc6ebdd69a738/FLAG7bb320a5b [2021-11-13 18:05:06,075 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:05:06,076 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i [2021-11-13 18:05:06,118 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/data/3136ab840/d0495425c83a459584acc6ebdd69a738/FLAG7bb320a5b [2021-11-13 18:05:06,517 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/data/3136ab840/d0495425c83a459584acc6ebdd69a738 [2021-11-13 18:05:06,520 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:05:06,522 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:05:06,526 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:05:06,527 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:05:06,530 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:05:06,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:05:06" (1/1) ... [2021-11-13 18:05:06,532 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9533a29 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:05:06, skipping insertion in model container [2021-11-13 18:05:06,533 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:05:06" (1/1) ... [2021-11-13 18:05:06,540 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:05:06,647 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:05:07,467 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_e8aca4cb-9219-454e-8bda-2c0941af4ac5/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i[88044,88057] [2021-11-13 18:05:08,093 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:05:08,158 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:05:08,289 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_e8aca4cb-9219-454e-8bda-2c0941af4ac5/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i[88044,88057] [2021-11-13 18:05:08,496 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:05:08,590 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:05:08,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:05:08 WrapperNode [2021-11-13 18:05:08,591 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:05:08,592 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:05:08,592 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:05:08,592 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:05:08,601 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:05:08" (1/1) ... [2021-11-13 18:05:08,671 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:05:08" (1/1) ... [2021-11-13 18:05:08,897 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:05:08,898 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:05:08,898 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:05:08,898 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:05:08,907 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:05:08" (1/1) ... [2021-11-13 18:05:08,908 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:05:08" (1/1) ... [2021-11-13 18:05:08,953 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:05:08" (1/1) ... [2021-11-13 18:05:08,954 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:05:08" (1/1) ... [2021-11-13 18:05:09,075 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:05:08" (1/1) ... [2021-11-13 18:05:09,096 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:05:08" (1/1) ... [2021-11-13 18:05:09,134 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:05:08" (1/1) ... [2021-11-13 18:05:09,170 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:05:09,176 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:05:09,176 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:05:09,176 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:05:09,178 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:05:08" (1/1) ... [2021-11-13 18:05:09,187 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:05:09,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:05:09,222 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:05:09,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:05:09,293 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_free [2021-11-13 18:05:09,294 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_free [2021-11-13 18:05:09,294 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int_nonpositive [2021-11-13 18:05:09,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int_nonpositive [2021-11-13 18:05:09,295 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-13 18:05:09,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-13 18:05:09,295 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-13 18:05:09,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-13 18:05:09,296 INFO L130 BoogieDeclarations]: Found specification of procedure get_gadget_data [2021-11-13 18:05:09,296 INFO L138 BoogieDeclarations]: Found implementation of procedure get_gadget_data [2021-11-13 18:05:09,296 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_free_request [2021-11-13 18:05:09,296 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_free_request [2021-11-13 18:05:09,297 INFO L130 BoogieDeclarations]: Found specification of procedure printer_reset_interface [2021-11-13 18:05:09,297 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_reset_interface [2021-11-13 18:05:09,297 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-11-13 18:05:09,297 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-11-13 18:05:09,297 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-13 18:05:09,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-13 18:05:09,298 INFO L130 BoogieDeclarations]: Found specification of procedure printer_soft_reset [2021-11-13 18:05:09,298 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_soft_reset [2021-11-13 18:05:09,298 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_class [2021-11-13 18:05:09,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_class [2021-11-13 18:05:09,299 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2021-11-13 18:05:09,299 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2021-11-13 18:05:09,299 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rx_reqs [2021-11-13 18:05:09,299 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rx_reqs [2021-11-13 18:05:09,299 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-13 18:05:09,343 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-13 18:05:09,343 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-13 18:05:09,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-13 18:05:09,343 INFO L130 BoogieDeclarations]: Found specification of procedure usb_gadget_vbus_draw [2021-11-13 18:05:09,344 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_gadget_vbus_draw [2021-11-13 18:05:09,344 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-13 18:05:09,344 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-13 18:05:09,344 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-13 18:05:09,344 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-13 18:05:09,344 INFO L130 BoogieDeclarations]: Found specification of procedure poll_wait [2021-11-13 18:05:09,345 INFO L138 BoogieDeclarations]: Found implementation of procedure poll_wait [2021-11-13 18:05:09,345 INFO L130 BoogieDeclarations]: Found specification of procedure printer_fsync [2021-11-13 18:05:09,345 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_fsync [2021-11-13 18:05:09,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:05:09,345 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-13 18:05:09,345 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-13 18:05:09,346 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 18:05:09,346 INFO L130 BoogieDeclarations]: Found specification of procedure printer_open [2021-11-13 18:05:09,346 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_open [2021-11-13 18:05:09,346 INFO L130 BoogieDeclarations]: Found specification of procedure printer_bind [2021-11-13 18:05:09,346 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_bind [2021-11-13 18:05:09,346 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-13 18:05:09,346 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-13 18:05:09,346 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-13 18:05:09,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-13 18:05:09,347 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2021-11-13 18:05:09,347 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2021-11-13 18:05:09,347 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-13 18:05:09,347 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-13 18:05:09,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 18:05:09,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 18:05:09,348 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2021-11-13 18:05:09,348 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2021-11-13 18:05:09,348 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-13 18:05:09,348 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-13 18:05:09,348 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2021-11-13 18:05:09,349 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2021-11-13 18:05:09,349 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2021-11-13 18:05:09,349 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2021-11-13 18:05:09,349 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-13 18:05:09,349 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-13 18:05:09,349 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-13 18:05:09,349 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-13 18:05:09,350 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_alloc [2021-11-13 18:05:09,350 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_alloc [2021-11-13 18:05:09,350 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-13 18:05:09,350 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-13 18:05:09,350 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2021-11-13 18:05:09,350 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2021-11-13 18:05:09,350 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2021-11-13 18:05:09,351 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-13 18:05:09,352 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-13 18:05:09,352 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-13 18:05:09,352 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-13 18:05:09,352 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2021-11-13 18:05:09,353 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2021-11-13 18:05:09,353 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2021-11-13 18:05:09,353 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2021-11-13 18:05:09,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2021-11-13 18:05:09,353 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 18:05:09,354 INFO L130 BoogieDeclarations]: Found specification of procedure printer_poll [2021-11-13 18:05:09,354 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_poll [2021-11-13 18:05:09,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-13 18:05:09,354 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-13 18:05:09,354 INFO L130 BoogieDeclarations]: Found specification of procedure set_printer_interface [2021-11-13 18:05:09,355 INFO L138 BoogieDeclarations]: Found implementation of procedure set_printer_interface [2021-11-13 18:05:09,355 INFO L130 BoogieDeclarations]: Found specification of procedure class_destroy [2021-11-13 18:05:09,355 INFO L138 BoogieDeclarations]: Found implementation of procedure class_destroy [2021-11-13 18:05:09,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 18:05:09,355 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_queue [2021-11-13 18:05:09,356 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_queue [2021-11-13 18:05:09,356 INFO L130 BoogieDeclarations]: Found specification of procedure set_interface [2021-11-13 18:05:09,356 INFO L138 BoogieDeclarations]: Found implementation of procedure set_interface [2021-11-13 18:05:09,356 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup_complete [2021-11-13 18:05:09,356 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup_complete [2021-11-13 18:05:09,357 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-13 18:05:09,357 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-13 18:05:09,357 INFO L130 BoogieDeclarations]: Found specification of procedure printer_write [2021-11-13 18:05:09,357 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_write [2021-11-13 18:05:09,357 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 18:05:09,358 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-11-13 18:05:09,358 INFO L130 BoogieDeclarations]: Found specification of procedure printer_unbind [2021-11-13 18:05:09,358 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_unbind [2021-11-13 18:05:09,358 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2021-11-13 18:05:09,358 INFO L130 BoogieDeclarations]: Found specification of procedure printer_close [2021-11-13 18:05:09,359 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_close [2021-11-13 18:05:09,359 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2021-11-13 18:05:09,359 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2021-11-13 18:05:09,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 18:05:09,359 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-13 18:05:09,360 INFO L130 BoogieDeclarations]: Found specification of procedure init_utsname [2021-11-13 18:05:09,360 INFO L138 BoogieDeclarations]: Found implementation of procedure init_utsname [2021-11-13 18:05:09,360 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_enable [2021-11-13 18:05:09,360 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_enable [2021-11-13 18:05:09,360 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2021-11-13 18:05:09,361 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2021-11-13 18:05:09,361 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-11-13 18:05:09,361 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-11-13 18:05:09,361 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2021-11-13 18:05:09,361 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2021-11-13 18:05:09,362 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_autoconfig [2021-11-13 18:05:09,362 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_autoconfig [2021-11-13 18:05:09,362 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2021-11-13 18:05:09,362 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2021-11-13 18:05:09,362 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-13 18:05:09,363 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-13 18:05:09,363 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup [2021-11-13 18:05:09,363 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup [2021-11-13 18:05:09,363 INFO L130 BoogieDeclarations]: Found specification of procedure set_gadget_data [2021-11-13 18:05:09,363 INFO L138 BoogieDeclarations]: Found implementation of procedure set_gadget_data [2021-11-13 18:05:09,364 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-13 18:05:09,364 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2021-11-13 18:05:09,364 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_disable [2021-11-13 18:05:09,364 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_disable [2021-11-13 18:05:09,364 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-11-13 18:05:09,365 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-11-13 18:05:09,365 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_region [2021-11-13 18:05:09,365 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_region [2021-11-13 18:05:09,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:05:09,365 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2021-11-13 18:05:09,366 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2021-11-13 18:05:09,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:05:09,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:05:09,366 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-13 18:05:09,366 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-13 18:05:10,463 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-13 18:05:49,767 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:05:49,767 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-13 18:05:49,772 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:05:49 BoogieIcfgContainer [2021-11-13 18:05:49,772 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:05:49,774 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:05:49,774 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:05:49,778 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:05:49,778 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:05:06" (1/3) ... [2021-11-13 18:05:49,779 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b022838 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:05:49, skipping insertion in model container [2021-11-13 18:05:49,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:05:08" (2/3) ... [2021-11-13 18:05:49,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b022838 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:05:49, skipping insertion in model container [2021-11-13 18:05:49,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:05:49" (3/3) ... [2021-11-13 18:05:49,781 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i [2021-11-13 18:05:49,787 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:05:49,787 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:05:49,862 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:05:49,879 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 18:05:49,879 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:05:49,944 INFO L276 IsEmpty]: Start isEmpty. Operand has 1275 states, 884 states have (on average 1.3834841628959276) internal successors, (1223), 927 states have internal predecessors, (1223), 323 states have call successors, (323), 67 states have call predecessors, (323), 66 states have return successors, (319), 316 states have call predecessors, (319), 319 states have call successors, (319) [2021-11-13 18:05:49,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-13 18:05:49,960 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:05:49,961 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:05:49,962 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:05:49,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:05:49,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1492979739, now seen corresponding path program 1 times [2021-11-13 18:05:49,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:05:49,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987196184] [2021-11-13 18:05:49,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:05:49,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:05:50,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:50,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:05:50,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:50,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:05:50,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:50,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:05:50,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:50,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:05:50,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:50,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:05:50,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:51,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 18:05:51,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:51,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:05:51,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:05:51,060 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 18:05:51,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:05:51,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987196184] [2021-11-13 18:05:51,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987196184] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:05:51,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:05:51,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:05:51,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369098625] [2021-11-13 18:05:51,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:05:51,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:05:51,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:05:51,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:05:51,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:05:51,124 INFO L87 Difference]: Start difference. First operand has 1275 states, 884 states have (on average 1.3834841628959276) internal successors, (1223), 927 states have internal predecessors, (1223), 323 states have call successors, (323), 67 states have call predecessors, (323), 66 states have return successors, (319), 316 states have call predecessors, (319), 319 states have call successors, (319) Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-13 18:05:53,222 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 18:06:00,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:06:00,161 INFO L93 Difference]: Finished difference Result 4347 states and 6622 transitions. [2021-11-13 18:06:00,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:06:00,164 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 56 [2021-11-13 18:06:00,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:06:00,229 INFO L225 Difference]: With dead ends: 4347 [2021-11-13 18:06:00,230 INFO L226 Difference]: Without dead ends: 3058 [2021-11-13 18:06:00,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:06:00,255 INFO L933 BasicCegarLoop]: 1899 mSDtfsCounter, 3882 mSDsluCounter, 2336 mSDsCounter, 0 mSdLazyCounter, 1575 mSolverCounterSat, 1998 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7255.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4202 SdHoareTripleChecker+Valid, 4235 SdHoareTripleChecker+Invalid, 3574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 94.16ms SdHoareTripleChecker+Time, 1998 IncrementalHoareTripleChecker+Valid, 1575 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8445.16ms IncrementalHoareTripleChecker+Time [2021-11-13 18:06:00,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4202 Valid, 4235 Invalid, 3574 Unknown, 0 Unchecked, 94.16ms Time], IncrementalHoareTripleChecker [1998 Valid, 1575 Invalid, 1 Unknown, 0 Unchecked, 8445.16ms Time] [2021-11-13 18:06:00,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3058 states. [2021-11-13 18:06:00,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3058 to 2334. [2021-11-13 18:06:00,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2334 states, 1608 states have (on average 1.3600746268656716) internal successors, (2187), 1669 states have internal predecessors, (2187), 602 states have call successors, (602), 125 states have call predecessors, (602), 123 states have return successors, (590), 581 states have call predecessors, (590), 590 states have call successors, (590) [2021-11-13 18:06:00,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2334 states to 2334 states and 3379 transitions. [2021-11-13 18:06:00,555 INFO L78 Accepts]: Start accepts. Automaton has 2334 states and 3379 transitions. Word has length 56 [2021-11-13 18:06:00,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:06:00,556 INFO L470 AbstractCegarLoop]: Abstraction has 2334 states and 3379 transitions. [2021-11-13 18:06:00,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-13 18:06:00,557 INFO L276 IsEmpty]: Start isEmpty. Operand 2334 states and 3379 transitions. [2021-11-13 18:06:00,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-13 18:06:00,562 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:06:00,563 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:06:00,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:06:00,563 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:06:00,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:06:00,564 INFO L85 PathProgramCache]: Analyzing trace with hash -963250297, now seen corresponding path program 1 times [2021-11-13 18:06:00,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:06:00,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525409262] [2021-11-13 18:06:00,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:06:00,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:06:00,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:00,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:06:00,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:00,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:06:00,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:00,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:06:00,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:00,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:06:00,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:00,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:06:00,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:00,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 18:06:00,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:00,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:06:00,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:00,989 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 18:06:00,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:06:00,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525409262] [2021-11-13 18:06:00,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525409262] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:06:00,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:06:00,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:06:00,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277911645] [2021-11-13 18:06:00,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:06:00,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:06:00,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:06:00,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:06:00,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:06:00,995 INFO L87 Difference]: Start difference. First operand 2334 states and 3379 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-13 18:06:03,064 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 18:06:11,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:06:11,362 INFO L93 Difference]: Finished difference Result 8380 states and 12482 transitions. [2021-11-13 18:06:11,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:06:11,363 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 57 [2021-11-13 18:06:11,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:06:11,435 INFO L225 Difference]: With dead ends: 8380 [2021-11-13 18:06:11,436 INFO L226 Difference]: Without dead ends: 6061 [2021-11-13 18:06:11,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:06:11,456 INFO L933 BasicCegarLoop]: 1962 mSDtfsCounter, 3190 mSDsluCounter, 2941 mSDsCounter, 0 mSdLazyCounter, 2127 mSolverCounterSat, 1145 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8857.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3506 SdHoareTripleChecker+Valid, 4903 SdHoareTripleChecker+Invalid, 3273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 67.90ms SdHoareTripleChecker+Time, 1145 IncrementalHoareTripleChecker+Valid, 2127 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9792.47ms IncrementalHoareTripleChecker+Time [2021-11-13 18:06:11,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3506 Valid, 4903 Invalid, 3273 Unknown, 0 Unchecked, 67.90ms Time], IncrementalHoareTripleChecker [1145 Valid, 2127 Invalid, 1 Unknown, 0 Unchecked, 9792.47ms Time] [2021-11-13 18:06:11,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6061 states. [2021-11-13 18:06:11,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6061 to 4613. [2021-11-13 18:06:11,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4613 states, 3187 states have (on average 1.3614684656416693) internal successors, (4339), 3300 states have internal predecessors, (4339), 1182 states have call successors, (1182), 247 states have call predecessors, (1182), 243 states have return successors, (1164), 1149 states have call predecessors, (1164), 1164 states have call successors, (1164) [2021-11-13 18:06:11,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4613 states to 4613 states and 6685 transitions. [2021-11-13 18:06:11,855 INFO L78 Accepts]: Start accepts. Automaton has 4613 states and 6685 transitions. Word has length 57 [2021-11-13 18:06:11,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:06:11,857 INFO L470 AbstractCegarLoop]: Abstraction has 4613 states and 6685 transitions. [2021-11-13 18:06:11,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-13 18:06:11,857 INFO L276 IsEmpty]: Start isEmpty. Operand 4613 states and 6685 transitions. [2021-11-13 18:06:11,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-13 18:06:11,867 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:06:11,867 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:06:11,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:06:11,868 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:06:11,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:06:11,869 INFO L85 PathProgramCache]: Analyzing trace with hash 538243510, now seen corresponding path program 1 times [2021-11-13 18:06:11,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:06:11,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165243044] [2021-11-13 18:06:11,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:06:11,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:06:12,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:12,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:06:12,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:12,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:06:12,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:12,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:06:12,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:12,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:06:12,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:12,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:06:12,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:12,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 18:06:12,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:12,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-11-13 18:06:12,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:12,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2021-11-13 18:06:12,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:12,410 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 18:06:12,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:06:12,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165243044] [2021-11-13 18:06:12,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165243044] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:06:12,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:06:12,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:06:12,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564887931] [2021-11-13 18:06:12,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:06:12,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:06:12,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:06:12,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:06:12,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:06:12,418 INFO L87 Difference]: Start difference. First operand 4613 states and 6685 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:06:14,487 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 18:06:16,617 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 18:06:22,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:06:22,977 INFO L93 Difference]: Finished difference Result 14993 states and 22029 transitions. [2021-11-13 18:06:22,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 18:06:22,979 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 59 [2021-11-13 18:06:22,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:06:23,094 INFO L225 Difference]: With dead ends: 14993 [2021-11-13 18:06:23,094 INFO L226 Difference]: Without dead ends: 10395 [2021-11-13 18:06:23,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:06:23,133 INFO L933 BasicCegarLoop]: 2055 mSDtfsCounter, 2217 mSDsluCounter, 2155 mSDsCounter, 0 mSdLazyCounter, 1309 mSolverCounterSat, 841 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9119.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2488 SdHoareTripleChecker+Valid, 4210 SdHoareTripleChecker+Invalid, 2152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 42.18ms SdHoareTripleChecker+Time, 841 IncrementalHoareTripleChecker+Valid, 1309 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10030.94ms IncrementalHoareTripleChecker+Time [2021-11-13 18:06:23,137 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2488 Valid, 4210 Invalid, 2152 Unknown, 0 Unchecked, 42.18ms Time], IncrementalHoareTripleChecker [841 Valid, 1309 Invalid, 2 Unknown, 0 Unchecked, 10030.94ms Time] [2021-11-13 18:06:23,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10395 states. [2021-11-13 18:06:23,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10395 to 8963. [2021-11-13 18:06:23,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8963 states, 6186 states have (on average 1.3632395732298739) internal successors, (8433), 6394 states have internal predecessors, (8433), 2294 states have call successors, (2294), 487 states have call predecessors, (2294), 482 states have return successors, (2276), 2249 states have call predecessors, (2276), 2276 states have call successors, (2276) [2021-11-13 18:06:23,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8963 states to 8963 states and 13003 transitions. [2021-11-13 18:06:23,847 INFO L78 Accepts]: Start accepts. Automaton has 8963 states and 13003 transitions. Word has length 59 [2021-11-13 18:06:23,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:06:23,848 INFO L470 AbstractCegarLoop]: Abstraction has 8963 states and 13003 transitions. [2021-11-13 18:06:23,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 18:06:23,850 INFO L276 IsEmpty]: Start isEmpty. Operand 8963 states and 13003 transitions. [2021-11-13 18:06:23,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-13 18:06:23,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:06:23,856 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:06:23,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 18:06:23,856 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:06:23,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:06:23,858 INFO L85 PathProgramCache]: Analyzing trace with hash 661729035, now seen corresponding path program 1 times [2021-11-13 18:06:23,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:06:23,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677102198] [2021-11-13 18:06:23,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:06:23,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:06:24,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:24,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:06:24,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:24,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:06:24,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:24,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:06:24,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:24,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:06:24,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:24,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:06:24,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:24,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 18:06:24,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:24,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:06:24,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:24,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-11-13 18:06:24,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:24,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:06:24,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:24,339 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 18:06:24,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:06:24,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677102198] [2021-11-13 18:06:24,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677102198] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:06:24,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:06:24,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:06:24,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302776359] [2021-11-13 18:06:24,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:06:24,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:06:24,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:06:24,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:06:24,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:06:24,347 INFO L87 Difference]: Start difference. First operand 8963 states and 13003 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 3 states have internal predecessors, (41), 3 states have call successors, (10), 4 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 18:06:26,408 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 18:06:28,534 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 18:06:35,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:06:35,449 INFO L93 Difference]: Finished difference Result 32602 states and 48606 transitions. [2021-11-13 18:06:35,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:06:35,449 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), 3 states have call successors, (10), 4 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 75 [2021-11-13 18:06:35,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:06:35,654 INFO L225 Difference]: With dead ends: 32602 [2021-11-13 18:06:35,655 INFO L226 Difference]: Without dead ends: 23651 [2021-11-13 18:06:35,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:06:35,721 INFO L933 BasicCegarLoop]: 1915 mSDtfsCounter, 3197 mSDsluCounter, 2892 mSDsCounter, 0 mSdLazyCounter, 2137 mSolverCounterSat, 1157 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9256.63ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3517 SdHoareTripleChecker+Valid, 4807 SdHoareTripleChecker+Invalid, 3296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 43.35ms SdHoareTripleChecker+Time, 1157 IncrementalHoareTripleChecker+Valid, 2137 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10301.99ms IncrementalHoareTripleChecker+Time [2021-11-13 18:06:35,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3517 Valid, 4807 Invalid, 3296 Unknown, 0 Unchecked, 43.35ms Time], IncrementalHoareTripleChecker [1157 Valid, 2137 Invalid, 2 Unknown, 0 Unchecked, 10301.99ms Time] [2021-11-13 18:06:35,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23651 states. [2021-11-13 18:06:36,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23651 to 17850. [2021-11-13 18:06:36,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17850 states, 12333 states have (on average 1.3637395605286629) internal successors, (16819), 12737 states have internal predecessors, (16819), 4558 states have call successors, (4558), 966 states have call predecessors, (4558), 958 states have return successors, (4538), 4482 states have call predecessors, (4538), 4538 states have call successors, (4538) [2021-11-13 18:06:36,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17850 states to 17850 states and 25915 transitions. [2021-11-13 18:06:36,983 INFO L78 Accepts]: Start accepts. Automaton has 17850 states and 25915 transitions. Word has length 75 [2021-11-13 18:06:36,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:06:36,987 INFO L470 AbstractCegarLoop]: Abstraction has 17850 states and 25915 transitions. [2021-11-13 18:06:36,987 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), 3 states have call successors, (10), 4 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 18:06:36,987 INFO L276 IsEmpty]: Start isEmpty. Operand 17850 states and 25915 transitions. [2021-11-13 18:06:36,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-13 18:06:36,993 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:06:36,993 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:06:36,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 18:06:36,994 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:06:36,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:06:36,999 INFO L85 PathProgramCache]: Analyzing trace with hash -178671597, now seen corresponding path program 1 times [2021-11-13 18:06:37,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:06:37,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674035672] [2021-11-13 18:06:37,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:06:37,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:06:38,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:38,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:06:38,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:38,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:06:38,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:38,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:06:38,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:38,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:06:38,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:38,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:06:38,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:38,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 18:06:38,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:38,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:06:38,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:38,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-13 18:06:38,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:38,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:06:38,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:39,036 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 18:06:39,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:06:39,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674035672] [2021-11-13 18:06:39,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674035672] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:06:39,037 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:06:39,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-13 18:06:39,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954427848] [2021-11-13 18:06:39,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:06:39,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-13 18:06:39,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:06:39,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-13 18:06:39,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2021-11-13 18:06:39,039 INFO L87 Difference]: Start difference. First operand 17850 states and 25915 transitions. Second operand has 15 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 10 states have internal predecessors, (43), 4 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 18:06:41,100 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 18:06:55,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:06:55,887 INFO L93 Difference]: Finished difference Result 62102 states and 93157 transitions. [2021-11-13 18:06:55,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-13 18:06:55,888 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 10 states have internal predecessors, (43), 4 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 77 [2021-11-13 18:06:55,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:06:56,213 INFO L225 Difference]: With dead ends: 62102 [2021-11-13 18:06:56,213 INFO L226 Difference]: Without dead ends: 44267 [2021-11-13 18:06:56,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2021-11-13 18:06:56,337 INFO L933 BasicCegarLoop]: 2085 mSDtfsCounter, 4827 mSDsluCounter, 20741 mSDsCounter, 0 mSdLazyCounter, 8130 mSolverCounterSat, 2428 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12644.57ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5216 SdHoareTripleChecker+Valid, 22826 SdHoareTripleChecker+Invalid, 10559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 242.56ms SdHoareTripleChecker+Time, 2428 IncrementalHoareTripleChecker+Valid, 8130 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14559.59ms IncrementalHoareTripleChecker+Time [2021-11-13 18:06:56,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5216 Valid, 22826 Invalid, 10559 Unknown, 0 Unchecked, 242.56ms Time], IncrementalHoareTripleChecker [2428 Valid, 8130 Invalid, 1 Unknown, 0 Unchecked, 14559.59ms Time] [2021-11-13 18:06:56,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44267 states. [2021-11-13 18:06:58,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44267 to 31054. [2021-11-13 18:06:58,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31054 states, 21443 states have (on average 1.3643613300377746) internal successors, (29256), 22154 states have internal predecessors, (29256), 7932 states have call successors, (7932), 1674 states have call predecessors, (7932), 1678 states have return successors, (7954), 7813 states have call predecessors, (7954), 7912 states have call successors, (7954) [2021-11-13 18:06:58,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31054 states to 31054 states and 45142 transitions. [2021-11-13 18:06:58,920 INFO L78 Accepts]: Start accepts. Automaton has 31054 states and 45142 transitions. Word has length 77 [2021-11-13 18:06:58,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:06:58,921 INFO L470 AbstractCegarLoop]: Abstraction has 31054 states and 45142 transitions. [2021-11-13 18:06:58,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 10 states have internal predecessors, (43), 4 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 18:06:58,921 INFO L276 IsEmpty]: Start isEmpty. Operand 31054 states and 45142 transitions. [2021-11-13 18:06:58,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-13 18:06:58,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:06:58,927 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:06:58,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 18:06:58,928 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:06:58,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:06:58,929 INFO L85 PathProgramCache]: Analyzing trace with hash -719494381, now seen corresponding path program 1 times [2021-11-13 18:06:58,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:06:58,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493185233] [2021-11-13 18:06:58,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:06:58,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:06:59,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:59,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:06:59,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:59,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:06:59,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:59,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:06:59,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:59,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:06:59,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:59,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:06:59,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:59,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 18:06:59,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:59,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:06:59,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:59,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-13 18:06:59,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:59,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:06:59,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:59,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-13 18:06:59,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:59,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-13 18:06:59,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:06:59,359 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 18:06:59,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:06:59,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493185233] [2021-11-13 18:06:59,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493185233] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:06:59,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:06:59,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:06:59,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191664765] [2021-11-13 18:06:59,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:06:59,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:06:59,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:06:59,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:06:59,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:06:59,366 INFO L87 Difference]: Start difference. First operand 31054 states and 45142 transitions. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 18:07:01,430 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:07:03,615 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:07:11,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:07:11,238 INFO L93 Difference]: Finished difference Result 72152 states and 107103 transitions. [2021-11-13 18:07:11,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:07:11,239 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 92 [2021-11-13 18:07:11,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:07:11,573 INFO L225 Difference]: With dead ends: 72152 [2021-11-13 18:07:11,573 INFO L226 Difference]: Without dead ends: 41113 [2021-11-13 18:07:11,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:07:11,689 INFO L933 BasicCegarLoop]: 3172 mSDtfsCounter, 2804 mSDsluCounter, 3265 mSDsCounter, 0 mSdLazyCounter, 1829 mSolverCounterSat, 1308 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8532.65ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3116 SdHoareTripleChecker+Valid, 6437 SdHoareTripleChecker+Invalid, 3139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 37.81ms SdHoareTripleChecker+Time, 1308 IncrementalHoareTripleChecker+Valid, 1829 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9595.27ms IncrementalHoareTripleChecker+Time [2021-11-13 18:07:11,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3116 Valid, 6437 Invalid, 3139 Unknown, 0 Unchecked, 37.81ms Time], IncrementalHoareTripleChecker [1308 Valid, 1829 Invalid, 2 Unknown, 0 Unchecked, 9595.27ms Time] [2021-11-13 18:07:11,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41113 states. [2021-11-13 18:07:13,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41113 to 31035. [2021-11-13 18:07:13,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31035 states, 21424 states have (on average 1.363937640029873) internal successors, (29221), 22137 states have internal predecessors, (29221), 7932 states have call successors, (7932), 1674 states have call predecessors, (7932), 1678 states have return successors, (7954), 7811 states have call predecessors, (7954), 7912 states have call successors, (7954) [2021-11-13 18:07:14,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31035 states to 31035 states and 45107 transitions. [2021-11-13 18:07:14,249 INFO L78 Accepts]: Start accepts. Automaton has 31035 states and 45107 transitions. Word has length 92 [2021-11-13 18:07:14,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:07:14,252 INFO L470 AbstractCegarLoop]: Abstraction has 31035 states and 45107 transitions. [2021-11-13 18:07:14,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 3 states have internal predecessors, (53), 3 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 18:07:14,252 INFO L276 IsEmpty]: Start isEmpty. Operand 31035 states and 45107 transitions. [2021-11-13 18:07:14,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-13 18:07:14,262 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:07:14,263 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-11-13 18:07:14,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 18:07:14,263 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:07:14,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:07:14,264 INFO L85 PathProgramCache]: Analyzing trace with hash -351940990, now seen corresponding path program 1 times [2021-11-13 18:07:14,264 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:07:14,264 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349827141] [2021-11-13 18:07:14,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:07:14,265 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:07:16,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:16,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:07:16,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:16,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:07:16,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:16,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:07:16,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:16,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:07:16,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:16,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:07:16,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:16,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 18:07:16,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:16,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:07:16,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:17,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:07:17,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:17,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 18:07:17,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:17,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:07:17,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:17,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:07:17,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:17,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-11-13 18:07:17,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:17,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:07:17,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:17,344 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-13 18:07:17,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:07:17,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349827141] [2021-11-13 18:07:17,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349827141] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:07:17,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:07:17,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-11-13 18:07:17,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110566435] [2021-11-13 18:07:17,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:07:17,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-13 18:07:17,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:07:17,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-13 18:07:17,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-11-13 18:07:17,347 INFO L87 Difference]: Start difference. First operand 31035 states and 45107 transitions. Second operand has 18 states, 16 states have (on average 3.3125) internal successors, (53), 13 states have internal predecessors, (53), 5 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-13 18:07:19,416 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:07:21,574 WARN L515 Checker$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 18:07:23,736 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 18:07:48,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:07:48,558 INFO L93 Difference]: Finished difference Result 91182 states and 135755 transitions. [2021-11-13 18:07:48,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-13 18:07:48,559 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 3.3125) internal successors, (53), 13 states have internal predecessors, (53), 5 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 98 [2021-11-13 18:07:48,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:07:48,931 INFO L225 Difference]: With dead ends: 91182 [2021-11-13 18:07:48,931 INFO L226 Difference]: Without dead ends: 60162 [2021-11-13 18:07:49,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=192, Invalid=1368, Unknown=0, NotChecked=0, Total=1560 [2021-11-13 18:07:49,058 INFO L933 BasicCegarLoop]: 3053 mSDtfsCounter, 3476 mSDsluCounter, 35308 mSDsCounter, 0 mSdLazyCounter, 14872 mSolverCounterSat, 1722 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24186.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3805 SdHoareTripleChecker+Valid, 38361 SdHoareTripleChecker+Invalid, 16597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 154.98ms SdHoareTripleChecker+Time, 1722 IncrementalHoareTripleChecker+Valid, 14872 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27399.86ms IncrementalHoareTripleChecker+Time [2021-11-13 18:07:49,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3805 Valid, 38361 Invalid, 16597 Unknown, 0 Unchecked, 154.98ms Time], IncrementalHoareTripleChecker [1722 Valid, 14872 Invalid, 3 Unknown, 0 Unchecked, 27399.86ms Time] [2021-11-13 18:07:49,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60162 states. [2021-11-13 18:07:51,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60162 to 31049. [2021-11-13 18:07:51,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31049 states, 21430 states have (on average 1.3637890807279516) internal successors, (29226), 22143 states have internal predecessors, (29226), 7936 states have call successors, (7936), 1678 states have call predecessors, (7936), 1682 states have return successors, (7958), 7815 states have call predecessors, (7958), 7916 states have call successors, (7958) [2021-11-13 18:07:51,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31049 states to 31049 states and 45120 transitions. [2021-11-13 18:07:51,958 INFO L78 Accepts]: Start accepts. Automaton has 31049 states and 45120 transitions. Word has length 98 [2021-11-13 18:07:51,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:07:51,959 INFO L470 AbstractCegarLoop]: Abstraction has 31049 states and 45120 transitions. [2021-11-13 18:07:51,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 3.3125) internal successors, (53), 13 states have internal predecessors, (53), 5 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-11-13 18:07:51,959 INFO L276 IsEmpty]: Start isEmpty. Operand 31049 states and 45120 transitions. [2021-11-13 18:07:52,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-13 18:07:52,238 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:07:52,239 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-11-13 18:07:52,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 18:07:52,256 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:07:52,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:07:52,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1252793173, now seen corresponding path program 1 times [2021-11-13 18:07:52,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:07:52,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926436826] [2021-11-13 18:07:52,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:07:52,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:07:52,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:52,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:07:52,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:52,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:07:52,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:52,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:07:52,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:52,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:07:52,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:52,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:07:52,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:52,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 18:07:52,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:52,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:07:52,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:53,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:07:53,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:53,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 18:07:53,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:53,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:07:53,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:53,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:07:53,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:53,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-13 18:07:53,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:53,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:07:53,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:53,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2021-11-13 18:07:53,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:53,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2021-11-13 18:07:53,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:07:53,340 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-13 18:07:53,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:07:53,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926436826] [2021-11-13 18:07:53,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926436826] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:07:53,341 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:07:53,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-11-13 18:07:53,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080832758] [2021-11-13 18:07:53,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:07:53,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-13 18:07:53,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:07:53,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-13 18:07:53,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-11-13 18:07:53,344 INFO L87 Difference]: Start difference. First operand 31049 states and 45120 transitions. Second operand has 17 states, 15 states have (on average 4.0) internal successors, (60), 12 states have internal predecessors, (60), 5 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-13 18:07:55,412 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 18:07:57,598 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:08:21,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:08:21,968 INFO L93 Difference]: Finished difference Result 66312 states and 98322 transitions. [2021-11-13 18:08:21,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-13 18:08:21,969 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 4.0) internal successors, (60), 12 states have internal predecessors, (60), 5 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 110 [2021-11-13 18:08:21,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:08:22,213 INFO L225 Difference]: With dead ends: 66312 [2021-11-13 18:08:22,213 INFO L226 Difference]: Without dead ends: 35300 [2021-11-13 18:08:22,334 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=188, Invalid=1294, Unknown=0, NotChecked=0, Total=1482 [2021-11-13 18:08:22,335 INFO L933 BasicCegarLoop]: 3369 mSDtfsCounter, 3191 mSDsluCounter, 35176 mSDsCounter, 0 mSdLazyCounter, 13176 mSolverCounterSat, 1242 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 22039.07ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3519 SdHoareTripleChecker+Valid, 38545 SdHoareTripleChecker+Invalid, 14420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 153.36ms SdHoareTripleChecker+Time, 1242 IncrementalHoareTripleChecker+Valid, 13176 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25264.33ms IncrementalHoareTripleChecker+Time [2021-11-13 18:08:22,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3519 Valid, 38545 Invalid, 14420 Unknown, 0 Unchecked, 153.36ms Time], IncrementalHoareTripleChecker [1242 Valid, 13176 Invalid, 2 Unknown, 0 Unchecked, 25264.33ms Time] [2021-11-13 18:08:22,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35300 states. [2021-11-13 18:08:24,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35300 to 26386. [2021-11-13 18:08:24,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26386 states, 18187 states have (on average 1.364821026007588) internal successors, (24822), 18793 states have internal predecessors, (24822), 6769 states have call successors, (6769), 1424 states have call predecessors, (6769), 1429 states have return successors, (6793), 6672 states have call predecessors, (6793), 6757 states have call successors, (6793) [2021-11-13 18:08:25,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26386 states to 26386 states and 38384 transitions. [2021-11-13 18:08:25,226 INFO L78 Accepts]: Start accepts. Automaton has 26386 states and 38384 transitions. Word has length 110 [2021-11-13 18:08:25,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:08:25,226 INFO L470 AbstractCegarLoop]: Abstraction has 26386 states and 38384 transitions. [2021-11-13 18:08:25,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 4.0) internal successors, (60), 12 states have internal predecessors, (60), 5 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-13 18:08:25,227 INFO L276 IsEmpty]: Start isEmpty. Operand 26386 states and 38384 transitions. [2021-11-13 18:08:25,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-13 18:08:25,234 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:08:25,236 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:08:25,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 18:08:25,237 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:08:25,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:08:25,237 INFO L85 PathProgramCache]: Analyzing trace with hash 387765073, now seen corresponding path program 1 times [2021-11-13 18:08:25,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:08:25,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756199846] [2021-11-13 18:08:25,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:08:25,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:08:26,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:26,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:08:26,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:26,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:08:26,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:26,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:08:26,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:26,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:08:26,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:26,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:08:26,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:26,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 18:08:26,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:26,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:08:26,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:26,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-13 18:08:26,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:26,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:08:26,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:26,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-13 18:08:26,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:26,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2021-11-13 18:08:26,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:26,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2021-11-13 18:08:26,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:26,657 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 18:08:26,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:08:26,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756199846] [2021-11-13 18:08:26,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756199846] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:08:26,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:08:26,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-13 18:08:26,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878410176] [2021-11-13 18:08:26,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:08:26,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 18:08:26,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:08:26,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 18:08:26,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:08:26,662 INFO L87 Difference]: Start difference. First operand 26386 states and 38384 transitions. Second operand has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 18:08:28,728 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 18:08:30,895 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:08:33,063 WARN L515 Checker$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 18:08:50,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:08:50,332 INFO L93 Difference]: Finished difference Result 56299 states and 83639 transitions. [2021-11-13 18:08:50,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 18:08:50,333 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 104 [2021-11-13 18:08:50,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:08:50,487 INFO L225 Difference]: With dead ends: 56299 [2021-11-13 18:08:50,488 INFO L226 Difference]: Without dead ends: 29950 [2021-11-13 18:08:50,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:08:50,575 INFO L933 BasicCegarLoop]: 1954 mSDtfsCounter, 3336 mSDsluCounter, 5056 mSDsCounter, 0 mSdLazyCounter, 7604 mSolverCounterSat, 1615 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19419.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3592 SdHoareTripleChecker+Valid, 7010 SdHoareTripleChecker+Invalid, 9222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 79.43ms SdHoareTripleChecker+Time, 1615 IncrementalHoareTripleChecker+Valid, 7604 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21594.54ms IncrementalHoareTripleChecker+Time [2021-11-13 18:08:50,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3592 Valid, 7010 Invalid, 9222 Unknown, 0 Unchecked, 79.43ms Time], IncrementalHoareTripleChecker [1615 Valid, 7604 Invalid, 3 Unknown, 0 Unchecked, 21594.54ms Time] [2021-11-13 18:08:50,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29950 states. [2021-11-13 18:08:52,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29950 to 22009. [2021-11-13 18:08:52,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22009 states, 15169 states have (on average 1.364493374645659) internal successors, (20698), 15673 states have internal predecessors, (20698), 5644 states have call successors, (5644), 1192 states have call predecessors, (5644), 1195 states have return successors, (5664), 5563 states have call predecessors, (5664), 5634 states have call successors, (5664) [2021-11-13 18:08:52,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22009 states to 22009 states and 32006 transitions. [2021-11-13 18:08:52,416 INFO L78 Accepts]: Start accepts. Automaton has 22009 states and 32006 transitions. Word has length 104 [2021-11-13 18:08:52,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:08:52,417 INFO L470 AbstractCegarLoop]: Abstraction has 22009 states and 32006 transitions. [2021-11-13 18:08:52,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (13), 5 states have call predecessors, (13), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 18:08:52,417 INFO L276 IsEmpty]: Start isEmpty. Operand 22009 states and 32006 transitions. [2021-11-13 18:08:52,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-13 18:08:52,426 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:08:52,427 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-11-13 18:08:52,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 18:08:52,427 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:08:52,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:08:52,428 INFO L85 PathProgramCache]: Analyzing trace with hash -926455928, now seen corresponding path program 1 times [2021-11-13 18:08:52,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:08:52,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227098697] [2021-11-13 18:08:52,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:08:52,429 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:08:53,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:53,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:08:53,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:53,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:08:53,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:53,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:08:53,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:53,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:08:53,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:53,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:08:53,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:53,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 18:08:53,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:53,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:08:53,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:53,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-13 18:08:53,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:53,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:08:53,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:53,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-13 18:08:53,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:53,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2021-11-13 18:08:53,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:53,622 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-13 18:08:53,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:08:53,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227098697] [2021-11-13 18:08:53,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227098697] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:08:53,623 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729415902] [2021-11-13 18:08:53,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:08:53,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:08:53,624 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:08:53,626 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:08:53,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:08:54,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:54,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 1954 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-13 18:08:54,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:08:54,903 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 18:08:54,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:08:54,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729415902] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:08:54,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:08:54,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [12] total 16 [2021-11-13 18:08:54,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114371586] [2021-11-13 18:08:54,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:08:54,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:08:54,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:08:54,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:08:54,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-11-13 18:08:54,906 INFO L87 Difference]: Start difference. First operand 22009 states and 32006 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 18:08:56,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:08:56,488 INFO L93 Difference]: Finished difference Result 22942 states and 33497 transitions. [2021-11-13 18:08:56,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:08:56,489 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 104 [2021-11-13 18:08:56,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:08:56,546 INFO L225 Difference]: With dead ends: 22942 [2021-11-13 18:08:56,547 INFO L226 Difference]: Without dead ends: 14150 [2021-11-13 18:08:56,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:08:56,572 INFO L933 BasicCegarLoop]: 2146 mSDtfsCounter, 1441 mSDsluCounter, 7897 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 407 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 361.23ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1501 SdHoareTripleChecker+Valid, 10043 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 15.98ms SdHoareTripleChecker+Time, 407 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 443.00ms IncrementalHoareTripleChecker+Time [2021-11-13 18:08:56,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1501 Valid, 10043 Invalid, 441 Unknown, 0 Unchecked, 15.98ms Time], IncrementalHoareTripleChecker [407 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 443.00ms Time] [2021-11-13 18:08:56,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14150 states. [2021-11-13 18:08:57,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14150 to 13255. [2021-11-13 18:08:57,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13255 states, 9137 states have (on average 1.363029440735471) internal successors, (12454), 9440 states have internal predecessors, (12454), 3394 states have call successors, (3394), 721 states have call predecessors, (3394), 723 states have return successors, (3404), 3345 states have call predecessors, (3404), 3386 states have call successors, (3404) [2021-11-13 18:08:57,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13255 states to 13255 states and 19252 transitions. [2021-11-13 18:08:57,498 INFO L78 Accepts]: Start accepts. Automaton has 13255 states and 19252 transitions. Word has length 104 [2021-11-13 18:08:57,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:08:57,498 INFO L470 AbstractCegarLoop]: Abstraction has 13255 states and 19252 transitions. [2021-11-13 18:08:57,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-13 18:08:57,499 INFO L276 IsEmpty]: Start isEmpty. Operand 13255 states and 19252 transitions. [2021-11-13 18:08:57,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-13 18:08:57,508 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:08:57,509 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-11-13 18:08:57,565 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:08:57,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-13 18:08:57,723 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:08:57,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:08:57,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1718379708, now seen corresponding path program 1 times [2021-11-13 18:08:57,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:08:57,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935515443] [2021-11-13 18:08:57,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:08:57,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:08:58,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:58,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:08:58,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:58,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:08:58,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:58,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:08:58,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:58,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:08:58,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:58,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:08:58,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:58,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 18:08:58,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:58,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:08:58,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:58,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-13 18:08:58,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:58,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:08:58,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:58,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-13 18:08:58,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:58,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 18:08:58,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:08:58,859 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-13 18:08:58,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:08:58,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935515443] [2021-11-13 18:08:58,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935515443] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:08:58,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:08:58,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-13 18:08:58,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350439868] [2021-11-13 18:08:58,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:08:58,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-13 18:08:58,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:08:58,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-13 18:08:58,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:08:58,862 INFO L87 Difference]: Start difference. First operand 13255 states and 19252 transitions. Second operand has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 9 states have internal predecessors, (67), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-13 18:09:00,937 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 18:09:08,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:08,938 INFO L93 Difference]: Finished difference Result 17985 states and 27164 transitions. [2021-11-13 18:09:08,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-13 18:09:08,939 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 9 states have internal predecessors, (67), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) Word has length 107 [2021-11-13 18:09:08,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:09,009 INFO L225 Difference]: With dead ends: 17985 [2021-11-13 18:09:09,009 INFO L226 Difference]: Without dead ends: 13594 [2021-11-13 18:09:09,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-11-13 18:09:09,026 INFO L933 BasicCegarLoop]: 2178 mSDtfsCounter, 2769 mSDsluCounter, 14001 mSDsCounter, 0 mSdLazyCounter, 4048 mSolverCounterSat, 1486 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7847.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2941 SdHoareTripleChecker+Valid, 16179 SdHoareTripleChecker+Invalid, 5535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 61.42ms SdHoareTripleChecker+Time, 1486 IncrementalHoareTripleChecker+Valid, 4048 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9024.52ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:09,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2941 Valid, 16179 Invalid, 5535 Unknown, 0 Unchecked, 61.42ms Time], IncrementalHoareTripleChecker [1486 Valid, 4048 Invalid, 1 Unknown, 0 Unchecked, 9024.52ms Time] [2021-11-13 18:09:09,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13594 states. [2021-11-13 18:09:09,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13594 to 8891. [2021-11-13 18:09:09,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8891 states, 6129 states have (on average 1.3610703214227444) internal successors, (8342), 6333 states have internal predecessors, (8342), 2273 states have call successors, (2273), 487 states have call predecessors, (2273), 488 states have return successors, (2277), 2238 states have call predecessors, (2277), 2265 states have call successors, (2277) [2021-11-13 18:09:09,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8891 states to 8891 states and 12892 transitions. [2021-11-13 18:09:09,720 INFO L78 Accepts]: Start accepts. Automaton has 8891 states and 12892 transitions. Word has length 107 [2021-11-13 18:09:09,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:09,723 INFO L470 AbstractCegarLoop]: Abstraction has 8891 states and 12892 transitions. [2021-11-13 18:09:09,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.583333333333333) internal successors, (67), 9 states have internal predecessors, (67), 2 states have call successors, (12), 4 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-13 18:09:09,723 INFO L276 IsEmpty]: Start isEmpty. Operand 8891 states and 12892 transitions. [2021-11-13 18:09:09,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-13 18:09:09,734 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:09,734 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:09:09,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 18:09:09,735 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:09:09,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:09,736 INFO L85 PathProgramCache]: Analyzing trace with hash -374227482, now seen corresponding path program 1 times [2021-11-13 18:09:09,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:09:09,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155001499] [2021-11-13 18:09:09,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:09,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:09:10,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:10,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:09:10,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:10,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:09:10,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:10,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:09:10,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:10,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:09:10,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:10,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:09:10,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:10,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 18:09:10,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:10,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:09:10,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:10,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-13 18:09:10,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:10,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:09:10,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:10,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-13 18:09:10,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:10,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 18:09:10,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:10,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2021-11-13 18:09:10,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:10,671 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-13 18:09:10,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:09:10,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155001499] [2021-11-13 18:09:10,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155001499] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:09:10,672 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:09:10,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-13 18:09:10,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744234601] [2021-11-13 18:09:10,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:09:10,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:09:10,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:09:10,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:09:10,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:09:10,674 INFO L87 Difference]: Start difference. First operand 8891 states and 12892 transitions. Second operand has 8 states, 8 states have (on average 8.0) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (14), 4 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 18:09:12,743 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 18:09:19,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:19,253 INFO L93 Difference]: Finished difference Result 20626 states and 30564 transitions. [2021-11-13 18:09:19,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:09:19,254 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (14), 4 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 110 [2021-11-13 18:09:19,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:19,304 INFO L225 Difference]: With dead ends: 20626 [2021-11-13 18:09:19,304 INFO L226 Difference]: Without dead ends: 11772 [2021-11-13 18:09:19,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:09:19,331 INFO L933 BasicCegarLoop]: 2020 mSDtfsCounter, 2437 mSDsluCounter, 7107 mSDsCounter, 0 mSdLazyCounter, 2572 mSolverCounterSat, 1322 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6718.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2531 SdHoareTripleChecker+Valid, 9127 SdHoareTripleChecker+Invalid, 3895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 41.63ms SdHoareTripleChecker+Time, 1322 IncrementalHoareTripleChecker+Valid, 2572 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7700.89ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:19,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2531 Valid, 9127 Invalid, 3895 Unknown, 0 Unchecked, 41.63ms Time], IncrementalHoareTripleChecker [1322 Valid, 2572 Invalid, 1 Unknown, 0 Unchecked, 7700.89ms Time] [2021-11-13 18:09:19,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11772 states. [2021-11-13 18:09:19,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11772 to 8885. [2021-11-13 18:09:19,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8885 states, 6126 states have (on average 1.360920666013712) internal successors, (8337), 6330 states have internal predecessors, (8337), 2271 states have call successors, (2271), 485 states have call predecessors, (2271), 487 states have return successors, (2275), 2237 states have call predecessors, (2275), 2263 states have call successors, (2275) [2021-11-13 18:09:19,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8885 states to 8885 states and 12883 transitions. [2021-11-13 18:09:19,992 INFO L78 Accepts]: Start accepts. Automaton has 8885 states and 12883 transitions. Word has length 110 [2021-11-13 18:09:19,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:19,992 INFO L470 AbstractCegarLoop]: Abstraction has 8885 states and 12883 transitions. [2021-11-13 18:09:19,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.0) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (14), 4 states have call predecessors, (14), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 18:09:19,993 INFO L276 IsEmpty]: Start isEmpty. Operand 8885 states and 12883 transitions. [2021-11-13 18:09:20,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-13 18:09:20,002 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:20,002 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-11-13 18:09:20,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-13 18:09:20,003 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:09:20,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:20,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1883275383, now seen corresponding path program 1 times [2021-11-13 18:09:20,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:09:20,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223748699] [2021-11-13 18:09:20,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:20,005 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:09:20,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:20,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:09:20,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:20,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:09:20,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:20,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:09:20,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:20,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:09:20,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:20,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:09:20,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:20,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 18:09:20,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:20,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:09:20,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:20,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-13 18:09:20,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:20,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:09:20,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:20,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-13 18:09:20,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:20,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 18:09:20,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:20,805 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-13 18:09:20,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:09:20,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223748699] [2021-11-13 18:09:20,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223748699] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:09:20,806 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:09:20,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:09:20,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59325998] [2021-11-13 18:09:20,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:09:20,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 18:09:20,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:09:20,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 18:09:20,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:09:20,808 INFO L87 Difference]: Start difference. First operand 8885 states and 12883 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 5 states have internal predecessors, (66), 2 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-13 18:09:22,878 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 18:09:29,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:09:29,383 INFO L93 Difference]: Finished difference Result 16365 states and 24093 transitions. [2021-11-13 18:09:29,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-13 18:09:29,384 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 5 states have internal predecessors, (66), 2 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) Word has length 109 [2021-11-13 18:09:29,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:09:29,415 INFO L225 Difference]: With dead ends: 16365 [2021-11-13 18:09:29,415 INFO L226 Difference]: Without dead ends: 7517 [2021-11-13 18:09:29,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-13 18:09:29,438 INFO L933 BasicCegarLoop]: 1871 mSDtfsCounter, 2887 mSDsluCounter, 4599 mSDsCounter, 0 mSdLazyCounter, 2168 mSolverCounterSat, 973 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6931.53ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3120 SdHoareTripleChecker+Valid, 6470 SdHoareTripleChecker+Invalid, 3142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 35.80ms SdHoareTripleChecker+Time, 973 IncrementalHoareTripleChecker+Valid, 2168 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7860.29ms IncrementalHoareTripleChecker+Time [2021-11-13 18:09:29,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3120 Valid, 6470 Invalid, 3142 Unknown, 0 Unchecked, 35.80ms Time], IncrementalHoareTripleChecker [973 Valid, 2168 Invalid, 1 Unknown, 0 Unchecked, 7860.29ms Time] [2021-11-13 18:09:29,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7517 states. [2021-11-13 18:09:29,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7517 to 5705. [2021-11-13 18:09:29,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5705 states, 3930 states have (on average 1.3536895674300256) internal successors, (5320), 4062 states have internal predecessors, (5320), 1449 states have call successors, (1449), 323 states have call predecessors, (1449), 325 states have return successors, (1447), 1424 states have call predecessors, (1447), 1441 states have call successors, (1447) [2021-11-13 18:09:29,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5705 states to 5705 states and 8216 transitions. [2021-11-13 18:09:29,838 INFO L78 Accepts]: Start accepts. Automaton has 5705 states and 8216 transitions. Word has length 109 [2021-11-13 18:09:29,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:09:29,838 INFO L470 AbstractCegarLoop]: Abstraction has 5705 states and 8216 transitions. [2021-11-13 18:09:29,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 5 states have internal predecessors, (66), 2 states have call successors, (12), 4 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-13 18:09:29,838 INFO L276 IsEmpty]: Start isEmpty. Operand 5705 states and 8216 transitions. [2021-11-13 18:09:29,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-13 18:09:29,846 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:09:29,846 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 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] [2021-11-13 18:09:29,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-13 18:09:29,847 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:09:29,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:09:29,848 INFO L85 PathProgramCache]: Analyzing trace with hash 605469970, now seen corresponding path program 1 times [2021-11-13 18:09:29,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:09:29,848 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326299564] [2021-11-13 18:09:29,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:29,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:09:30,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:30,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:09:30,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:30,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:09:30,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:30,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:09:30,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:30,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:09:30,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:30,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:09:30,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:30,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 18:09:30,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:30,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:09:30,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:31,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:09:31,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:31,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-11-13 18:09:31,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:31,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:09:31,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:31,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-11-13 18:09:31,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:31,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2021-11-13 18:09:31,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:31,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:09:31,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:31,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2021-11-13 18:09:31,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:31,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2021-11-13 18:09:31,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:31,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-13 18:09:31,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:31,486 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-13 18:09:31,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:09:31,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326299564] [2021-11-13 18:09:31,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326299564] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:09:31,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075770782] [2021-11-13 18:09:31,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:09:31,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:09:31,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:09:31,494 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:09:31,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:09:59,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:09:59,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 1987 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-13 18:09:59,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:10:00,704 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-13 18:10:00,705 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:10:00,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075770782] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:10:00,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:10:00,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [16] total 20 [2021-11-13 18:10:00,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620152658] [2021-11-13 18:10:00,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:10:00,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 18:10:00,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:10:00,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 18:10:00,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=335, Unknown=0, NotChecked=0, Total=380 [2021-11-13 18:10:00,708 INFO L87 Difference]: Start difference. First operand 5705 states and 8216 transitions. Second operand has 14 states, 12 states have (on average 5.833333333333333) internal successors, (70), 11 states have internal predecessors, (70), 5 states have call successors, (18), 2 states have call predecessors, (18), 6 states have return successors, (16), 7 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-13 18:10:01,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:10:01,956 INFO L93 Difference]: Finished difference Result 8076 states and 11596 transitions. [2021-11-13 18:10:01,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 18:10:01,957 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 5.833333333333333) internal successors, (70), 11 states have internal predecessors, (70), 5 states have call successors, (18), 2 states have call predecessors, (18), 6 states have return successors, (16), 7 states have call predecessors, (16), 5 states have call successors, (16) Word has length 119 [2021-11-13 18:10:01,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:10:01,977 INFO L225 Difference]: With dead ends: 8076 [2021-11-13 18:10:01,977 INFO L226 Difference]: Without dead ends: 3468 [2021-11-13 18:10:01,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 140 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-11-13 18:10:01,996 INFO L933 BasicCegarLoop]: 1971 mSDtfsCounter, 226 mSDsluCounter, 21349 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 290.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 23320 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 45.18ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 335.15ms IncrementalHoareTripleChecker+Time [2021-11-13 18:10:01,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 23320 Invalid, 212 Unknown, 0 Unchecked, 45.18ms Time], IncrementalHoareTripleChecker [4 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 335.15ms Time] [2021-11-13 18:10:02,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3468 states. [2021-11-13 18:10:02,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3468 to 3456. [2021-11-13 18:10:02,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3456 states, 2382 states have (on average 1.3497061293031067) internal successors, (3215), 2459 states have internal predecessors, (3215), 876 states have call successors, (876), 199 states have call predecessors, (876), 197 states have return successors, (869), 860 states have call predecessors, (869), 869 states have call successors, (869) [2021-11-13 18:10:02,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3456 states to 3456 states and 4960 transitions. [2021-11-13 18:10:02,467 INFO L78 Accepts]: Start accepts. Automaton has 3456 states and 4960 transitions. Word has length 119 [2021-11-13 18:10:02,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:10:02,468 INFO L470 AbstractCegarLoop]: Abstraction has 3456 states and 4960 transitions. [2021-11-13 18:10:02,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 5.833333333333333) internal successors, (70), 11 states have internal predecessors, (70), 5 states have call successors, (18), 2 states have call predecessors, (18), 6 states have return successors, (16), 7 states have call predecessors, (16), 5 states have call successors, (16) [2021-11-13 18:10:02,468 INFO L276 IsEmpty]: Start isEmpty. Operand 3456 states and 4960 transitions. [2021-11-13 18:10:02,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-13 18:10:02,475 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:10:02,475 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-11-13 18:10:02,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-13 18:10:02,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:10:02,679 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:10:02,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:10:02,680 INFO L85 PathProgramCache]: Analyzing trace with hash -2061167594, now seen corresponding path program 1 times [2021-11-13 18:10:02,680 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:10:02,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074144413] [2021-11-13 18:10:02,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:10:02,681 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:10:02,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:02,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:10:02,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:02,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:10:02,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:02,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:10:02,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:02,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:10:03,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:03,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:10:03,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:03,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 18:10:03,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:03,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:10:03,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:03,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-13 18:10:03,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:03,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:10:03,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:03,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-13 18:10:03,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:03,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 18:10:03,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:03,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2021-11-13 18:10:03,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:03,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2021-11-13 18:10:03,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:03,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-11-13 18:10:03,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:03,128 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-13 18:10:03,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:10:03,128 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074144413] [2021-11-13 18:10:03,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074144413] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:10:03,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:10:03,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 18:10:03,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905697261] [2021-11-13 18:10:03,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:10:03,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:10:03,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:10:03,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:10:03,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:10:03,132 INFO L87 Difference]: Start difference. First operand 3456 states and 4960 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (16), 6 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 18:10:05,205 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 18:10:07,394 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:10:09,575 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:10:24,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:10:24,232 INFO L93 Difference]: Finished difference Result 4544 states and 6780 transitions. [2021-11-13 18:10:24,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 18:10:24,240 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (16), 6 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) Word has length 120 [2021-11-13 18:10:24,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:10:24,266 INFO L225 Difference]: With dead ends: 4544 [2021-11-13 18:10:24,266 INFO L226 Difference]: Without dead ends: 4541 [2021-11-13 18:10:24,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-13 18:10:24,271 INFO L933 BasicCegarLoop]: 2808 mSDtfsCounter, 3787 mSDsluCounter, 1416 mSDsCounter, 0 mSdLazyCounter, 4490 mSolverCounterSat, 2596 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17937.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4044 SdHoareTripleChecker+Valid, 4224 SdHoareTripleChecker+Invalid, 7089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 63.43ms SdHoareTripleChecker+Time, 2596 IncrementalHoareTripleChecker+Valid, 4490 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20279.41ms IncrementalHoareTripleChecker+Time [2021-11-13 18:10:24,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4044 Valid, 4224 Invalid, 7089 Unknown, 0 Unchecked, 63.43ms Time], IncrementalHoareTripleChecker [2596 Valid, 4490 Invalid, 3 Unknown, 0 Unchecked, 20279.41ms Time] [2021-11-13 18:10:24,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4541 states. [2021-11-13 18:10:24,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4541 to 3455. [2021-11-13 18:10:24,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3455 states, 2382 states have (on average 1.348866498740554) internal successors, (3213), 2458 states have internal predecessors, (3213), 875 states have call successors, (875), 199 states have call predecessors, (875), 197 states have return successors, (869), 860 states have call predecessors, (869), 869 states have call successors, (869) [2021-11-13 18:10:24,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3455 states to 3455 states and 4957 transitions. [2021-11-13 18:10:24,633 INFO L78 Accepts]: Start accepts. Automaton has 3455 states and 4957 transitions. Word has length 120 [2021-11-13 18:10:24,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:10:24,634 INFO L470 AbstractCegarLoop]: Abstraction has 3455 states and 4957 transitions. [2021-11-13 18:10:24,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 3 states have internal predecessors, (70), 3 states have call successors, (16), 6 states have call predecessors, (16), 1 states have return successors, (14), 2 states have call predecessors, (14), 2 states have call successors, (14) [2021-11-13 18:10:24,634 INFO L276 IsEmpty]: Start isEmpty. Operand 3455 states and 4957 transitions. [2021-11-13 18:10:24,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-13 18:10:24,642 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:10:24,642 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 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] [2021-11-13 18:10:24,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-13 18:10:24,643 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:10:24,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:10:24,643 INFO L85 PathProgramCache]: Analyzing trace with hash -230154401, now seen corresponding path program 1 times [2021-11-13 18:10:24,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:10:24,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204576113] [2021-11-13 18:10:24,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:10:24,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:10:25,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:25,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:10:25,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:25,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:10:25,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:25,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:10:25,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:25,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:10:25,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:25,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:10:25,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:25,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 18:10:25,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:25,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:10:25,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:25,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-13 18:10:25,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:25,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:10:25,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:25,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-13 18:10:25,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:25,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-13 18:10:25,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:25,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 18:10:25,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:25,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2021-11-13 18:10:25,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:25,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2021-11-13 18:10:25,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:25,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-11-13 18:10:25,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:10:25,947 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-13 18:10:25,948 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:10:25,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204576113] [2021-11-13 18:10:25,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204576113] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:10:25,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:10:25,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-11-13 18:10:25,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488184791] [2021-11-13 18:10:25,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:10:25,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-13 18:10:25,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:10:25,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-13 18:10:25,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-11-13 18:10:25,951 INFO L87 Difference]: Start difference. First operand 3455 states and 4957 transitions. Second operand has 15 states, 15 states have (on average 4.8) internal successors, (72), 11 states have internal predecessors, (72), 3 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-13 18:10:28,026 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:10:30,220 WARN L515 Checker$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 18:10:32,425 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:10:34,546 WARN L515 Checker$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 18:10:59,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:10:59,517 INFO L93 Difference]: Finished difference Result 6911 states and 10153 transitions. [2021-11-13 18:10:59,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-13 18:10:59,517 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 11 states have internal predecessors, (72), 3 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 124 [2021-11-13 18:10:59,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:10:59,532 INFO L225 Difference]: With dead ends: 6911 [2021-11-13 18:10:59,533 INFO L226 Difference]: Without dead ends: 4536 [2021-11-13 18:10:59,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-11-13 18:10:59,542 INFO L933 BasicCegarLoop]: 1744 mSDtfsCounter, 2201 mSDsluCounter, 9194 mSDsCounter, 0 mSdLazyCounter, 13277 mSolverCounterSat, 1028 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29710.12ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2467 SdHoareTripleChecker+Valid, 10938 SdHoareTripleChecker+Invalid, 14309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 106.96ms SdHoareTripleChecker+Time, 1028 IncrementalHoareTripleChecker+Valid, 13277 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32611.40ms IncrementalHoareTripleChecker+Time [2021-11-13 18:10:59,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2467 Valid, 10938 Invalid, 14309 Unknown, 0 Unchecked, 106.96ms Time], IncrementalHoareTripleChecker [1028 Valid, 13277 Invalid, 4 Unknown, 0 Unchecked, 32611.40ms Time] [2021-11-13 18:10:59,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4536 states. [2021-11-13 18:10:59,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4536 to 3440. [2021-11-13 18:10:59,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3440 states, 2371 states have (on average 1.3500632644453816) internal successors, (3201), 2447 states have internal predecessors, (3201), 873 states have call successors, (873), 197 states have call predecessors, (873), 195 states have return successors, (867), 858 states have call predecessors, (867), 867 states have call successors, (867) [2021-11-13 18:10:59,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3440 states to 3440 states and 4941 transitions. [2021-11-13 18:10:59,810 INFO L78 Accepts]: Start accepts. Automaton has 3440 states and 4941 transitions. Word has length 124 [2021-11-13 18:10:59,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:10:59,810 INFO L470 AbstractCegarLoop]: Abstraction has 3440 states and 4941 transitions. [2021-11-13 18:10:59,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.8) internal successors, (72), 11 states have internal predecessors, (72), 3 states have call successors, (17), 5 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-13 18:10:59,810 INFO L276 IsEmpty]: Start isEmpty. Operand 3440 states and 4941 transitions. [2021-11-13 18:10:59,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-13 18:10:59,816 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:10:59,817 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:10:59,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-13 18:10:59,817 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:10:59,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:10:59,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1418200633, now seen corresponding path program 1 times [2021-11-13 18:10:59,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:10:59,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063047784] [2021-11-13 18:10:59,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:10:59,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:10:59,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:00,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-11-13 18:11:00,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:00,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2021-11-13 18:11:00,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:00,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-13 18:11:00,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:00,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-11-13 18:11:00,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:00,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-11-13 18:11:00,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:00,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-11-13 18:11:00,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:00,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-11-13 18:11:00,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:00,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-11-13 18:11:00,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:00,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2021-11-13 18:11:00,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:00,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2021-11-13 18:11:00,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:00,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2021-11-13 18:11:00,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:00,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2021-11-13 18:11:00,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:00,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2021-11-13 18:11:00,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:11:00,160 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-13 18:11:00,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:11:00,160 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063047784] [2021-11-13 18:11:00,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063047784] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:11:00,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:11:00,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 18:11:00,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939737158] [2021-11-13 18:11:00,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:11:00,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 18:11:00,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:11:00,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 18:11:00,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:11:00,164 INFO L87 Difference]: Start difference. First operand 3440 states and 4941 transitions. Second operand has 5 states, 5 states have (on average 15.4) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (14), 4 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 18:11:02,231 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:11:04,399 WARN L515 Checker$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 18:11:06,584 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.18s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:11:15,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:11:15,950 INFO L93 Difference]: Finished difference Result 6837 states and 10071 transitions. [2021-11-13 18:11:15,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:11:15,951 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (14), 4 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 130 [2021-11-13 18:11:15,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:11:15,969 INFO L225 Difference]: With dead ends: 6837 [2021-11-13 18:11:15,969 INFO L226 Difference]: Without dead ends: 4494 [2021-11-13 18:11:15,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:11:15,978 INFO L933 BasicCegarLoop]: 3041 mSDtfsCounter, 2430 mSDsluCounter, 3944 mSDsCounter, 0 mSdLazyCounter, 2424 mSolverCounterSat, 828 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13671.14ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2738 SdHoareTripleChecker+Valid, 6985 SdHoareTripleChecker+Invalid, 3255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 41.07ms SdHoareTripleChecker+Time, 828 IncrementalHoareTripleChecker+Valid, 2424 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15233.83ms IncrementalHoareTripleChecker+Time [2021-11-13 18:11:15,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2738 Valid, 6985 Invalid, 3255 Unknown, 0 Unchecked, 41.07ms Time], IncrementalHoareTripleChecker [828 Valid, 2424 Invalid, 3 Unknown, 0 Unchecked, 15233.83ms Time] [2021-11-13 18:11:15,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4494 states. [2021-11-13 18:11:16,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4494 to 3412. [2021-11-13 18:11:16,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3412 states, 2354 states have (on average 1.3500424808836025) internal successors, (3178), 2428 states have internal predecessors, (3178), 866 states have call successors, (866), 193 states have call predecessors, (866), 191 states have return successors, (862), 853 states have call predecessors, (862), 862 states have call successors, (862) [2021-11-13 18:11:16,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3412 states to 3412 states and 4906 transitions. [2021-11-13 18:11:16,258 INFO L78 Accepts]: Start accepts. Automaton has 3412 states and 4906 transitions. Word has length 130 [2021-11-13 18:11:16,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:11:16,258 INFO L470 AbstractCegarLoop]: Abstraction has 3412 states and 4906 transitions. [2021-11-13 18:11:16,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.4) internal successors, (77), 3 states have internal predecessors, (77), 3 states have call successors, (14), 4 states have call predecessors, (14), 1 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 18:11:16,259 INFO L276 IsEmpty]: Start isEmpty. Operand 3412 states and 4906 transitions. [2021-11-13 18:11:16,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-13 18:11:16,265 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:11:16,265 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 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] [2021-11-13 18:11:16,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-13 18:11:16,266 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:11:16,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:11:16,266 INFO L85 PathProgramCache]: Analyzing trace with hash 890655371, now seen corresponding path program 1 times [2021-11-13 18:11:16,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:11:16,266 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783352434] [2021-11-13 18:11:16,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:11:16,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:11:17,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:11:17,142 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-13 18:11:17,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 18:11:18,536 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-13 18:11:18,537 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-13 18:11:18,538 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-13 18:11:18,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-13 18:11:18,545 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:11:18,550 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 18:11:18,910 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 18:11:18,913 INFO L158 Benchmark]: Toolchain (without parser) took 372391.22ms. Allocated memory was 88.1MB in the beginning and 5.0GB in the end (delta: 4.9GB). Free memory was 62.5MB in the beginning and 2.3GB in the end (delta: -2.2GB). Peak memory consumption was 2.6GB. Max. memory is 16.1GB. [2021-11-13 18:11:18,914 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 88.1MB. Free memory was 68.0MB in the beginning and 67.9MB in the end (delta: 42.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 18:11:18,914 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2064.60ms. Allocated memory was 88.1MB in the beginning and 123.7MB in the end (delta: 35.7MB). Free memory was 62.3MB in the beginning and 63.2MB in the end (delta: -903.4kB). Peak memory consumption was 55.8MB. Max. memory is 16.1GB. [2021-11-13 18:11:18,915 INFO L158 Benchmark]: Boogie Procedure Inliner took 304.98ms. Allocated memory is still 123.7MB. Free memory was 63.2MB in the beginning and 70.1MB in the end (delta: -6.9MB). Peak memory consumption was 26.1MB. Max. memory is 16.1GB. [2021-11-13 18:11:18,915 INFO L158 Benchmark]: Boogie Preprocessor took 276.99ms. Allocated memory is still 123.7MB. Free memory was 70.1MB in the beginning and 46.5MB in the end (delta: 23.6MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2021-11-13 18:11:18,916 INFO L158 Benchmark]: RCFGBuilder took 40596.47ms. Allocated memory was 123.7MB in the beginning and 723.5MB in the end (delta: 599.8MB). Free memory was 46.5MB in the beginning and 322.0MB in the end (delta: -275.5MB). Peak memory consumption was 432.0MB. Max. memory is 16.1GB. [2021-11-13 18:11:18,921 INFO L158 Benchmark]: TraceAbstraction took 329138.42ms. Allocated memory was 723.5MB in the beginning and 5.0GB in the end (delta: 4.3GB). Free memory was 322.0MB in the beginning and 2.3GB in the end (delta: -2.0GB). Peak memory consumption was 2.3GB. Max. memory is 16.1GB. [2021-11-13 18:11:18,924 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 88.1MB. Free memory was 68.0MB in the beginning and 67.9MB in the end (delta: 42.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2064.60ms. Allocated memory was 88.1MB in the beginning and 123.7MB in the end (delta: 35.7MB). Free memory was 62.3MB in the beginning and 63.2MB in the end (delta: -903.4kB). Peak memory consumption was 55.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 304.98ms. Allocated memory is still 123.7MB. Free memory was 63.2MB in the beginning and 70.1MB in the end (delta: -6.9MB). Peak memory consumption was 26.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 276.99ms. Allocated memory is still 123.7MB. Free memory was 70.1MB in the beginning and 46.5MB in the end (delta: 23.6MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * RCFGBuilder took 40596.47ms. Allocated memory was 123.7MB in the beginning and 723.5MB in the end (delta: 599.8MB). Free memory was 46.5MB in the beginning and 322.0MB in the end (delta: -275.5MB). Peak memory consumption was 432.0MB. Max. memory is 16.1GB. * TraceAbstraction took 329138.42ms. Allocated memory was 723.5MB in the beginning and 5.0GB in the end (delta: 4.3GB). Free memory was 322.0MB in the beginning and 2.3GB in the end (delta: -2.0GB). Peak memory consumption was 2.3GB. Max. memory is 16.1GB. * 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 18:11:19,163 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-11-13 18:11:19,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/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_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/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_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/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_e8aca4cb-9219-454e-8bda-2c0941af4ac5/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 e3555fedd9f92961bad45780711b37c7eb42c00277e0bac6769cfc03eaec14a8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:11:22,085 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:11:22,088 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:11:22,143 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:11:22,144 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:11:22,150 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:11:22,153 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:11:22,161 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:11:22,166 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:11:22,173 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:11:22,175 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:11:22,178 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:11:22,178 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:11:22,182 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:11:22,185 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:11:22,191 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:11:22,193 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:11:22,195 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:11:22,197 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:11:22,207 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:11:22,210 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:11:22,212 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:11:22,216 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:11:22,218 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:11:22,227 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:11:22,227 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:11:22,228 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:11:22,230 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:11:22,232 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:11:22,233 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:11:22,235 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:11:22,236 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:11:22,238 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:11:22,239 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:11:22,241 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:11:22,249 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:11:22,251 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:11:22,251 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:11:22,252 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:11:22,254 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:11:22,255 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:11:22,257 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-64bit-Automizer_Bitvector.epf [2021-11-13 18:11:22,327 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:11:22,328 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:11:22,329 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:11:22,329 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:11:22,330 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:11:22,331 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:11:22,333 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:11:22,333 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:11:22,334 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:11:22,334 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:11:22,335 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:11:22,336 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:11:22,336 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:11:22,336 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:11:22,337 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 18:11:22,337 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 18:11:22,338 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:11:22,338 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:11:22,338 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:11:22,339 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:11:22,339 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:11:22,339 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:11:22,340 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:11:22,340 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:11:22,340 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:11:22,341 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:11:22,341 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-11-13 18:11:22,341 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 18:11:22,342 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:11:22,342 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:11:22,342 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:11:22,343 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:11:22,343 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 18:11:22,344 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_e8aca4cb-9219-454e-8bda-2c0941af4ac5/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e3555fedd9f92961bad45780711b37c7eb42c00277e0bac6769cfc03eaec14a8 [2021-11-13 18:11:22,884 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:11:22,919 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:11:22,922 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:11:22,924 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:11:22,925 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:11:22,927 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/ldv-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i [2021-11-13 18:11:23,015 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/data/e58cdeda1/e629a76be270486e8a137fc73f84ed10/FLAG07bd4cbf1 [2021-11-13 18:11:24,235 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:11:24,236 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i [2021-11-13 18:11:24,289 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/data/e58cdeda1/e629a76be270486e8a137fc73f84ed10/FLAG07bd4cbf1 [2021-11-13 18:11:24,557 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/data/e58cdeda1/e629a76be270486e8a137fc73f84ed10 [2021-11-13 18:11:24,560 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:11:24,566 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:11:24,576 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:11:24,576 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:11:24,580 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:11:24,582 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:11:24" (1/1) ... [2021-11-13 18:11:24,583 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@781fd889 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:24, skipping insertion in model container [2021-11-13 18:11:24,584 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:11:24" (1/1) ... [2021-11-13 18:11:24,594 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:11:24,773 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:11:25,876 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_e8aca4cb-9219-454e-8bda-2c0941af4ac5/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i[88044,88057] [2021-11-13 18:11:26,664 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:11:26,714 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:11:26,851 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_e8aca4cb-9219-454e-8bda-2c0941af4ac5/sv-benchmarks/c/ldv-validator-v0.6/linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i[88044,88057] [2021-11-13 18:11:27,153 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:11:27,312 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:11:27,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:27 WrapperNode [2021-11-13 18:11:27,313 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:11:27,315 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:11:27,315 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:11:27,316 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:11:27,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:27" (1/1) ... [2021-11-13 18:11:27,449 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:27" (1/1) ... [2021-11-13 18:11:27,693 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:11:27,694 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:11:27,694 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:11:27,694 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:11:27,705 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:27" (1/1) ... [2021-11-13 18:11:27,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:27" (1/1) ... [2021-11-13 18:11:27,731 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:27" (1/1) ... [2021-11-13 18:11:27,731 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:27" (1/1) ... [2021-11-13 18:11:27,973 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:27" (1/1) ... [2021-11-13 18:11:28,012 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:27" (1/1) ... [2021-11-13 18:11:28,063 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:27" (1/1) ... [2021-11-13 18:11:28,129 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:11:28,141 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:11:28,142 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:11:28,142 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:11:28,143 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:27" (1/1) ... [2021-11-13 18:11:28,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:11:28,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:11:28,180 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:11:28,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:11:28,272 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_free [2021-11-13 18:11:28,273 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_free [2021-11-13 18:11:28,273 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int_nonpositive [2021-11-13 18:11:28,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int_nonpositive [2021-11-13 18:11:28,273 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2021-11-13 18:11:28,273 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE8 [2021-11-13 18:11:28,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-13 18:11:28,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2021-11-13 18:11:28,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE2 [2021-11-13 18:11:28,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2021-11-13 18:11:28,275 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2021-11-13 18:11:28,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2021-11-13 18:11:28,275 INFO L130 BoogieDeclarations]: Found specification of procedure get_gadget_data [2021-11-13 18:11:28,275 INFO L138 BoogieDeclarations]: Found implementation of procedure get_gadget_data [2021-11-13 18:11:28,275 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_free_request [2021-11-13 18:11:28,276 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_free_request [2021-11-13 18:11:28,276 INFO L130 BoogieDeclarations]: Found specification of procedure printer_reset_interface [2021-11-13 18:11:28,276 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_reset_interface [2021-11-13 18:11:28,276 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2021-11-13 18:11:28,276 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2021-11-13 18:11:28,277 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2021-11-13 18:11:28,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2021-11-13 18:11:28,277 INFO L130 BoogieDeclarations]: Found specification of procedure printer_soft_reset [2021-11-13 18:11:28,277 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_soft_reset [2021-11-13 18:11:28,278 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_class [2021-11-13 18:11:28,278 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_class [2021-11-13 18:11:28,278 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2021-11-13 18:11:28,278 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2021-11-13 18:11:28,278 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rx_reqs [2021-11-13 18:11:28,279 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rx_reqs [2021-11-13 18:11:28,279 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-13 18:11:28,279 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-13 18:11:28,279 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2021-11-13 18:11:28,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2021-11-13 18:11:28,280 INFO L130 BoogieDeclarations]: Found specification of procedure usb_gadget_vbus_draw [2021-11-13 18:11:28,280 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_gadget_vbus_draw [2021-11-13 18:11:28,280 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-11-13 18:11:28,280 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-11-13 18:11:28,280 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2021-11-13 18:11:28,307 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2021-11-13 18:11:28,308 INFO L130 BoogieDeclarations]: Found specification of procedure poll_wait [2021-11-13 18:11:28,308 INFO L138 BoogieDeclarations]: Found implementation of procedure poll_wait [2021-11-13 18:11:28,308 INFO L130 BoogieDeclarations]: Found specification of procedure printer_fsync [2021-11-13 18:11:28,308 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_fsync [2021-11-13 18:11:28,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:11:28,308 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2021-11-13 18:11:28,308 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2021-11-13 18:11:28,308 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-13 18:11:28,309 INFO L130 BoogieDeclarations]: Found specification of procedure printer_open [2021-11-13 18:11:28,309 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_open [2021-11-13 18:11:28,309 INFO L130 BoogieDeclarations]: Found specification of procedure printer_bind [2021-11-13 18:11:28,309 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_bind [2021-11-13 18:11:28,309 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2021-11-13 18:11:28,309 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2021-11-13 18:11:28,309 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2021-11-13 18:11:28,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2021-11-13 18:11:28,310 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2021-11-13 18:11:28,310 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2021-11-13 18:11:28,310 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2021-11-13 18:11:28,310 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2021-11-13 18:11:28,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE8 [2021-11-13 18:11:28,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2021-11-13 18:11:28,310 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE2 [2021-11-13 18:11:28,310 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 18:11:28,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-13 18:11:28,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-13 18:11:28,311 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2021-11-13 18:11:28,311 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2021-11-13 18:11:28,311 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2021-11-13 18:11:28,311 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2021-11-13 18:11:28,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE2 [2021-11-13 18:11:28,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 18:11:28,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE4 [2021-11-13 18:11:28,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE8 [2021-11-13 18:11:28,312 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2021-11-13 18:11:28,312 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2021-11-13 18:11:28,312 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2021-11-13 18:11:28,314 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2021-11-13 18:11:28,315 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2021-11-13 18:11:28,315 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2021-11-13 18:11:28,315 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2021-11-13 18:11:28,315 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2021-11-13 18:11:28,315 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_alloc [2021-11-13 18:11:28,316 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_alloc [2021-11-13 18:11:28,316 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2021-11-13 18:11:28,316 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2021-11-13 18:11:28,317 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2021-11-13 18:11:28,317 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2021-11-13 18:11:28,317 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2021-11-13 18:11:28,318 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2021-11-13 18:11:28,318 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2021-11-13 18:11:28,318 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2021-11-13 18:11:28,319 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2021-11-13 18:11:28,319 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2021-11-13 18:11:28,319 INFO L130 BoogieDeclarations]: Found specification of procedure printer_poll [2021-11-13 18:11:28,320 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_poll [2021-11-13 18:11:28,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2021-11-13 18:11:28,321 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2021-11-13 18:11:28,321 INFO L130 BoogieDeclarations]: Found specification of procedure set_printer_interface [2021-11-13 18:11:28,321 INFO L138 BoogieDeclarations]: Found implementation of procedure set_printer_interface [2021-11-13 18:11:28,321 INFO L130 BoogieDeclarations]: Found specification of procedure class_destroy [2021-11-13 18:11:28,321 INFO L138 BoogieDeclarations]: Found implementation of procedure class_destroy [2021-11-13 18:11:28,322 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_queue [2021-11-13 18:11:28,322 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_queue [2021-11-13 18:11:28,322 INFO L130 BoogieDeclarations]: Found specification of procedure set_interface [2021-11-13 18:11:28,322 INFO L138 BoogieDeclarations]: Found implementation of procedure set_interface [2021-11-13 18:11:28,322 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE4 [2021-11-13 18:11:28,323 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup_complete [2021-11-13 18:11:28,323 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup_complete [2021-11-13 18:11:28,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE2 [2021-11-13 18:11:28,323 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1 [2021-11-13 18:11:28,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE8 [2021-11-13 18:11:28,324 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2021-11-13 18:11:28,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~C_INT [2021-11-13 18:11:28,325 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2021-11-13 18:11:28,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2021-11-13 18:11:28,326 INFO L130 BoogieDeclarations]: Found specification of procedure printer_write [2021-11-13 18:11:28,327 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_write [2021-11-13 18:11:28,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-13 18:11:28,331 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2021-11-13 18:11:28,331 INFO L130 BoogieDeclarations]: Found specification of procedure printer_unbind [2021-11-13 18:11:28,331 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_unbind [2021-11-13 18:11:28,332 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2021-11-13 18:11:28,335 INFO L130 BoogieDeclarations]: Found specification of procedure printer_close [2021-11-13 18:11:28,335 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_close [2021-11-13 18:11:28,335 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2021-11-13 18:11:28,335 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2021-11-13 18:11:28,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-13 18:11:28,337 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2021-11-13 18:11:28,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE8 [2021-11-13 18:11:28,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE2 [2021-11-13 18:11:28,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE4 [2021-11-13 18:11:28,338 INFO L130 BoogieDeclarations]: Found specification of procedure init_utsname [2021-11-13 18:11:28,338 INFO L138 BoogieDeclarations]: Found implementation of procedure init_utsname [2021-11-13 18:11:28,339 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_enable [2021-11-13 18:11:28,339 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_enable [2021-11-13 18:11:28,339 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2021-11-13 18:11:28,340 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2021-11-13 18:11:28,340 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2021-11-13 18:11:28,340 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2021-11-13 18:11:28,340 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2021-11-13 18:11:28,340 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2021-11-13 18:11:28,341 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_autoconfig [2021-11-13 18:11:28,341 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_autoconfig [2021-11-13 18:11:28,341 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2021-11-13 18:11:28,341 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2021-11-13 18:11:28,341 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2021-11-13 18:11:28,342 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2021-11-13 18:11:28,342 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup [2021-11-13 18:11:28,342 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup [2021-11-13 18:11:28,342 INFO L130 BoogieDeclarations]: Found specification of procedure set_gadget_data [2021-11-13 18:11:28,342 INFO L138 BoogieDeclarations]: Found implementation of procedure set_gadget_data [2021-11-13 18:11:28,343 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_disable [2021-11-13 18:11:28,343 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_disable [2021-11-13 18:11:28,343 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2021-11-13 18:11:28,343 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2021-11-13 18:11:28,344 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_region [2021-11-13 18:11:28,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_region [2021-11-13 18:11:28,344 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~intINTTYPE1 [2021-11-13 18:11:28,344 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2021-11-13 18:11:28,344 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2021-11-13 18:11:28,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:11:28,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:11:28,345 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2021-11-13 18:11:28,345 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2021-11-13 18:11:29,565 INFO L766 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2021-11-13 18:12:35,082 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:12:35,083 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-13 18:12:35,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:12:35 BoogieIcfgContainer [2021-11-13 18:12:35,089 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:12:35,092 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:12:35,092 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:12:35,096 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:12:35,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:11:24" (1/3) ... [2021-11-13 18:12:35,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e3e84cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:12:35, skipping insertion in model container [2021-11-13 18:12:35,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:11:27" (2/3) ... [2021-11-13 18:12:35,098 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e3e84cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:12:35, skipping insertion in model container [2021-11-13 18:12:35,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:12:35" (3/3) ... [2021-11-13 18:12:35,104 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-stable-2b9ec6c-1-106_1a-drivers--usb--gadget--g_printer.ko-entry_point.cil.out.i [2021-11-13 18:12:35,112 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:12:35,113 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:12:35,202 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:12:35,218 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 18:12:35,219 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:12:35,284 INFO L276 IsEmpty]: Start isEmpty. Operand has 1265 states, 878 states have (on average 1.3849658314350797) internal successors, (1216), 921 states have internal predecessors, (1216), 320 states have call successors, (320), 66 states have call predecessors, (320), 65 states have return successors, (316), 313 states have call predecessors, (316), 316 states have call successors, (316) [2021-11-13 18:12:35,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-13 18:12:35,314 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:12:35,315 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:12:35,316 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:12:35,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:12:35,328 INFO L85 PathProgramCache]: Analyzing trace with hash 552217187, now seen corresponding path program 1 times [2021-11-13 18:12:35,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:12:35,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1456690083] [2021-11-13 18:12:35,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:12:35,353 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:12:35,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:12:35,359 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:12:35,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 18:12:37,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:37,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 1083 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:12:37,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:12:38,380 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 18:12:38,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:12:38,646 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 18:12:38,647 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:12:38,648 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1456690083] [2021-11-13 18:12:38,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1456690083] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:12:38,648 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:12:38,649 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-13 18:12:38,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98571149] [2021-11-13 18:12:38,651 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:12:38,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:12:38,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:12:38,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:12:38,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:12:38,692 INFO L87 Difference]: Start difference. First operand has 1265 states, 878 states have (on average 1.3849658314350797) internal successors, (1216), 921 states have internal predecessors, (1216), 320 states have call successors, (320), 66 states have call predecessors, (320), 65 states have return successors, (316), 313 states have call predecessors, (316), 316 states have call successors, (316) Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-13 18:12:39,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:12:39,074 INFO L93 Difference]: Finished difference Result 3597 states and 5353 transitions. [2021-11-13 18:12:39,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:12:39,077 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 56 [2021-11-13 18:12:39,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:12:39,150 INFO L225 Difference]: With dead ends: 3597 [2021-11-13 18:12:39,150 INFO L226 Difference]: Without dead ends: 2318 [2021-11-13 18:12:39,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 109 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 18:12:39,174 INFO L933 BasicCegarLoop]: 2010 mSDtfsCounter, 1682 mSDsluCounter, 1653 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1682 SdHoareTripleChecker+Valid, 3663 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 36.93ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 73.45ms IncrementalHoareTripleChecker+Time [2021-11-13 18:12:39,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1682 Valid, 3663 Invalid, 24 Unknown, 0 Unchecked, 36.93ms Time], IncrementalHoareTripleChecker [11 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 73.45ms Time] [2021-11-13 18:12:39,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2318 states. [2021-11-13 18:12:39,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2318 to 2314. [2021-11-13 18:12:39,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2314 states, 1596 states have (on average 1.3615288220551378) internal successors, (2173), 1657 states have internal predecessors, (2173), 596 states have call successors, (596), 123 states have call predecessors, (596), 121 states have return successors, (584), 575 states have call predecessors, (584), 584 states have call successors, (584) [2021-11-13 18:12:39,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 3353 transitions. [2021-11-13 18:12:39,488 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 3353 transitions. Word has length 56 [2021-11-13 18:12:39,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:12:39,489 INFO L470 AbstractCegarLoop]: Abstraction has 2314 states and 3353 transitions. [2021-11-13 18:12:39,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-13 18:12:39,490 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 3353 transitions. [2021-11-13 18:12:39,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-13 18:12:39,498 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:12:39,499 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:12:39,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:12:39,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:12:39,715 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:12:39,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:12:39,716 INFO L85 PathProgramCache]: Analyzing trace with hash -62076608, now seen corresponding path program 1 times [2021-11-13 18:12:39,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:12:39,720 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1778153115] [2021-11-13 18:12:39,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:12:39,721 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:12:39,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:12:39,722 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:12:39,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 18:12:41,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:42,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 1084 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:12:42,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:12:42,341 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 18:12:42,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:12:42,578 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 18:12:42,579 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:12:42,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1778153115] [2021-11-13 18:12:42,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1778153115] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:12:42,579 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:12:42,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-13 18:12:42,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100475104] [2021-11-13 18:12:42,580 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:12:42,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:12:42,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:12:42,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:12:42,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:12:42,582 INFO L87 Difference]: Start difference. First operand 2314 states and 3353 transitions. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-13 18:12:42,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:12:42,840 INFO L93 Difference]: Finished difference Result 6880 states and 9982 transitions. [2021-11-13 18:12:42,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:12:42,841 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) Word has length 57 [2021-11-13 18:12:42,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:12:42,884 INFO L225 Difference]: With dead ends: 6880 [2021-11-13 18:12:42,884 INFO L226 Difference]: Without dead ends: 4581 [2021-11-13 18:12:42,897 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 111 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 18:12:42,899 INFO L933 BasicCegarLoop]: 2107 mSDtfsCounter, 1666 mSDsluCounter, 1651 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1666 SdHoareTripleChecker+Valid, 3758 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.59ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.17ms IncrementalHoareTripleChecker+Time [2021-11-13 18:12:42,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1666 Valid, 3758 Invalid, 13 Unknown, 0 Unchecked, 16.59ms Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 27.17ms Time] [2021-11-13 18:12:42,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4581 states. [2021-11-13 18:12:43,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4581 to 4573. [2021-11-13 18:12:43,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4573 states, 3163 states have (on average 1.3629465697122984) internal successors, (4311), 3276 states have internal predecessors, (4311), 1170 states have call successors, (1170), 243 states have call predecessors, (1170), 239 states have return successors, (1152), 1137 states have call predecessors, (1152), 1152 states have call successors, (1152) [2021-11-13 18:12:43,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4573 states to 4573 states and 6633 transitions. [2021-11-13 18:12:43,221 INFO L78 Accepts]: Start accepts. Automaton has 4573 states and 6633 transitions. Word has length 57 [2021-11-13 18:12:43,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:12:43,223 INFO L470 AbstractCegarLoop]: Abstraction has 4573 states and 6633 transitions. [2021-11-13 18:12:43,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (15), 3 states have call predecessors, (15), 2 states have return successors, (14), 1 states have call predecessors, (14), 1 states have call successors, (14) [2021-11-13 18:12:43,223 INFO L276 IsEmpty]: Start isEmpty. Operand 4573 states and 6633 transitions. [2021-11-13 18:12:43,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-13 18:12:43,225 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:12:43,226 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:12:43,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:12:43,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:12:43,452 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:12:43,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:12:43,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1572137986, now seen corresponding path program 1 times [2021-11-13 18:12:43,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:12:43,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [585492128] [2021-11-13 18:12:43,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:12:43,457 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:12:43,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:12:43,459 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:12:43,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 18:12:45,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:45,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 1092 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:12:45,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:12:45,860 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 18:12:45,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:12:46,034 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 18:12:46,035 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:12:46,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [585492128] [2021-11-13 18:12:46,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [585492128] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:12:46,035 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:12:46,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 18:12:46,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232933689] [2021-11-13 18:12:46,036 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:12:46,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:12:46,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:12:46,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:12:46,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:12:46,037 INFO L87 Difference]: Start difference. First operand 4573 states and 6633 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, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-13 18:12:48,287 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.25s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:12:52,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:12:52,339 INFO L93 Difference]: Finished difference Result 17735 states and 25788 transitions. [2021-11-13 18:12:52,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:12:52,340 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, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 59 [2021-11-13 18:12:52,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:12:52,475 INFO L225 Difference]: With dead ends: 17735 [2021-11-13 18:12:52,476 INFO L226 Difference]: Without dead ends: 13177 [2021-11-13 18:12:52,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 114 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 18:12:52,516 INFO L933 BasicCegarLoop]: 2489 mSDtfsCounter, 3238 mSDsluCounter, 3688 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 6 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5202.98ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3238 SdHoareTripleChecker+Valid, 6177 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 36.15ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5633.96ms IncrementalHoareTripleChecker+Time [2021-11-13 18:12:52,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3238 Valid, 6177 Invalid, 593 Unknown, 0 Unchecked, 36.15ms Time], IncrementalHoareTripleChecker [6 Valid, 586 Invalid, 1 Unknown, 0 Unchecked, 5633.96ms Time] [2021-11-13 18:12:52,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13177 states. [2021-11-13 18:12:53,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13177 to 13167. [2021-11-13 18:12:53,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13167 states, 9094 states have (on average 1.3667253133934463) internal successors, (12429), 9398 states have internal predecessors, (12429), 3370 states have call successors, (3370), 707 states have call predecessors, (3370), 702 states have return successors, (3352), 3313 states have call predecessors, (3352), 3352 states have call successors, (3352) [2021-11-13 18:12:53,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13167 states to 13167 states and 19151 transitions. [2021-11-13 18:12:53,429 INFO L78 Accepts]: Start accepts. Automaton has 13167 states and 19151 transitions. Word has length 59 [2021-11-13 18:12:53,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:12:53,430 INFO L470 AbstractCegarLoop]: Abstraction has 13167 states and 19151 transitions. [2021-11-13 18:12:53,431 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, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-13 18:12:53,431 INFO L276 IsEmpty]: Start isEmpty. Operand 13167 states and 19151 transitions. [2021-11-13 18:12:53,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-13 18:12:53,435 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:12:53,436 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:12:53,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:12:53,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:12:53,651 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:12:53,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:12:53,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1660206286, now seen corresponding path program 1 times [2021-11-13 18:12:53,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:12:53,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1848965694] [2021-11-13 18:12:53,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:12:53,655 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:12:53,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:12:53,656 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:12:53,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 18:12:55,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:12:55,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 1129 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-13 18:12:55,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:12:56,178 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 18:12:56,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:12:56,626 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 18:12:56,626 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:12:56,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1848965694] [2021-11-13 18:12:56,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1848965694] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:12:56,627 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:12:56,627 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-11-13 18:12:56,627 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012621785] [2021-11-13 18:12:56,627 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:12:56,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:12:56,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:12:56,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:12:56,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:12:56,629 INFO L87 Difference]: Start difference. First operand 13167 states and 19151 transitions. Second operand has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 18:12:58,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:12:58,415 INFO L93 Difference]: Finished difference Result 29612 states and 43651 transitions. [2021-11-13 18:12:58,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 18:12:58,416 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) Word has length 75 [2021-11-13 18:12:58,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:12:58,560 INFO L225 Difference]: With dead ends: 29612 [2021-11-13 18:12:58,561 INFO L226 Difference]: Without dead ends: 16460 [2021-11-13 18:12:58,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:12:58,633 INFO L933 BasicCegarLoop]: 2026 mSDtfsCounter, 698 mSDsluCounter, 8046 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 799.92ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 10072 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 34.73ms SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 916.80ms IncrementalHoareTripleChecker+Time [2021-11-13 18:12:58,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [834 Valid, 10072 Invalid, 161 Unknown, 0 Unchecked, 34.73ms Time], IncrementalHoareTripleChecker [69 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 916.80ms Time] [2021-11-13 18:12:58,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16460 states. [2021-11-13 18:12:59,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16460 to 13183. [2021-11-13 18:12:59,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13183 states, 9106 states have (on average 1.3662420382165605) internal successors, (12441), 9410 states have internal predecessors, (12441), 3370 states have call successors, (3370), 707 states have call predecessors, (3370), 706 states have return successors, (3364), 3317 states have call predecessors, (3364), 3352 states have call successors, (3364) [2021-11-13 18:12:59,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13183 states to 13183 states and 19175 transitions. [2021-11-13 18:12:59,491 INFO L78 Accepts]: Start accepts. Automaton has 13183 states and 19175 transitions. Word has length 75 [2021-11-13 18:12:59,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:12:59,492 INFO L470 AbstractCegarLoop]: Abstraction has 13183 states and 19175 transitions. [2021-11-13 18:12:59,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.25) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (12), 2 states have call predecessors, (12), 4 states have return successors, (12), 4 states have call predecessors, (12), 2 states have call successors, (12) [2021-11-13 18:12:59,492 INFO L276 IsEmpty]: Start isEmpty. Operand 13183 states and 19175 transitions. [2021-11-13 18:12:59,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-13 18:12:59,498 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:12:59,498 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:12:59,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:12:59,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:12:59,711 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:12:59,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:12:59,712 INFO L85 PathProgramCache]: Analyzing trace with hash -495083486, now seen corresponding path program 1 times [2021-11-13 18:12:59,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:12:59,714 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2647786] [2021-11-13 18:12:59,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:12:59,714 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:12:59,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:12:59,716 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:12:59,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 18:13:02,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:13:02,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 1131 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-13 18:13:02,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:13:03,888 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 18:13:03,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:13:06,725 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 18:13:06,725 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:13:06,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2647786] [2021-11-13 18:13:06,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2647786] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:13:06,726 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:13:06,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13, 13] imperfect sequences [] total 22 [2021-11-13 18:13:06,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386075059] [2021-11-13 18:13:06,726 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:13:06,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-13 18:13:06,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:13:06,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-13 18:13:06,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-11-13 18:13:06,728 INFO L87 Difference]: Start difference. First operand 13183 states and 19175 transitions. Second operand has 22 states, 19 states have (on average 3.0) internal successors, (57), 17 states have internal predecessors, (57), 6 states have call successors, (12), 3 states have call predecessors, (12), 7 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-13 18:13:08,915 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:13:10,930 WARN L515 Checker$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 18:13:12,937 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:13:14,950 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:13:16,960 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:13:18,970 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:13:20,975 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:13:22,985 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:14:16,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:14:16,592 INFO L93 Difference]: Finished difference Result 48343 states and 70743 transitions. [2021-11-13 18:14:16,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-13 18:14:16,593 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 19 states have (on average 3.0) internal successors, (57), 17 states have internal predecessors, (57), 6 states have call successors, (12), 3 states have call predecessors, (12), 7 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) Word has length 77 [2021-11-13 18:14:16,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:14:16,804 INFO L225 Difference]: With dead ends: 48343 [2021-11-13 18:14:16,804 INFO L226 Difference]: Without dead ends: 35175 [2021-11-13 18:14:16,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=276, Invalid=1980, Unknown=0, NotChecked=0, Total=2256 [2021-11-13 18:14:16,859 INFO L933 BasicCegarLoop]: 2390 mSDtfsCounter, 5167 mSDsluCounter, 35505 mSDsCounter, 0 mSdLazyCounter, 8717 mSolverCounterSat, 630 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 58230.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 5248 SdHoareTripleChecker+Valid, 37895 SdHoareTripleChecker+Invalid, 9355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 141.50ms SdHoareTripleChecker+Time, 630 IncrementalHoareTripleChecker+Valid, 8717 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 62648.19ms IncrementalHoareTripleChecker+Time [2021-11-13 18:14:16,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5248 Valid, 37895 Invalid, 9355 Unknown, 0 Unchecked, 141.50ms Time], IncrementalHoareTripleChecker [630 Valid, 8717 Invalid, 8 Unknown, 0 Unchecked, 62648.19ms Time] [2021-11-13 18:14:16,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35175 states. [2021-11-13 18:14:18,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35175 to 28370. [2021-11-13 18:14:18,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28370 states, 19593 states have (on average 1.3674271423467566) internal successors, (26792), 20246 states have internal predecessors, (26792), 7256 states have call successors, (7256), 1519 states have call predecessors, (7256), 1520 states have return successors, (7262), 7150 states have call predecessors, (7262), 7238 states have call successors, (7262) [2021-11-13 18:14:18,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28370 states to 28370 states and 41310 transitions. [2021-11-13 18:14:18,999 INFO L78 Accepts]: Start accepts. Automaton has 28370 states and 41310 transitions. Word has length 77 [2021-11-13 18:14:19,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:14:19,000 INFO L470 AbstractCegarLoop]: Abstraction has 28370 states and 41310 transitions. [2021-11-13 18:14:19,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 19 states have (on average 3.0) internal successors, (57), 17 states have internal predecessors, (57), 6 states have call successors, (12), 3 states have call predecessors, (12), 7 states have return successors, (12), 6 states have call predecessors, (12), 5 states have call successors, (12) [2021-11-13 18:14:19,000 INFO L276 IsEmpty]: Start isEmpty. Operand 28370 states and 41310 transitions. [2021-11-13 18:14:19,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-13 18:14:19,004 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:14:19,004 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:14:19,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:14:19,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:14:19,227 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:14:19,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:14:19,228 INFO L85 PathProgramCache]: Analyzing trace with hash 883910775, now seen corresponding path program 1 times [2021-11-13 18:14:19,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:14:19,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1906380707] [2021-11-13 18:14:19,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:14:19,230 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:14:19,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:14:19,232 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:14:19,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 18:14:21,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:14:21,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 1152 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:14:21,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:14:21,737 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 18:14:21,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:14:22,055 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 18:14:22,055 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:14:22,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1906380707] [2021-11-13 18:14:22,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1906380707] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:14:22,056 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:14:22,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-13 18:14:22,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144224625] [2021-11-13 18:14:22,056 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:14:22,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:14:22,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:14:22,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:14:22,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:14:22,058 INFO L87 Difference]: Start difference. First operand 28370 states and 41310 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-13 18:14:23,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:14:23,834 INFO L93 Difference]: Finished difference Result 85051 states and 123863 transitions. [2021-11-13 18:14:23,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:14:23,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) Word has length 83 [2021-11-13 18:14:23,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:14:24,160 INFO L225 Difference]: With dead ends: 85051 [2021-11-13 18:14:24,160 INFO L226 Difference]: Without dead ends: 56693 [2021-11-13 18:14:24,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 163 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 18:14:24,254 INFO L933 BasicCegarLoop]: 2036 mSDtfsCounter, 1640 mSDsluCounter, 1674 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1640 SdHoareTripleChecker+Valid, 3710 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.90ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.03ms IncrementalHoareTripleChecker+Time [2021-11-13 18:14:24,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1640 Valid, 3710 Invalid, 13 Unknown, 0 Unchecked, 5.90ms Time], IncrementalHoareTripleChecker [5 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 28.03ms Time] [2021-11-13 18:14:24,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56693 states. [2021-11-13 18:14:27,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56693 to 54486. [2021-11-13 18:14:27,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54486 states, 37643 states have (on average 1.3674786812953272) internal successors, (51476), 38891 states have internal predecessors, (51476), 13926 states have call successors, (13926), 2912 states have call predecessors, (13926), 2916 states have return successors, (13954), 13732 states have call predecessors, (13954), 13906 states have call successors, (13954) [2021-11-13 18:14:27,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54486 states to 54486 states and 79356 transitions. [2021-11-13 18:14:27,821 INFO L78 Accepts]: Start accepts. Automaton has 54486 states and 79356 transitions. Word has length 83 [2021-11-13 18:14:27,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:14:27,822 INFO L470 AbstractCegarLoop]: Abstraction has 54486 states and 79356 transitions. [2021-11-13 18:14:27,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 3 states have call successors, (21), 3 states have call predecessors, (21), 2 states have return successors, (20), 2 states have call predecessors, (20), 2 states have call successors, (20) [2021-11-13 18:14:27,823 INFO L276 IsEmpty]: Start isEmpty. Operand 54486 states and 79356 transitions. [2021-11-13 18:14:27,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-13 18:14:27,833 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:14:27,833 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:14:27,874 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 18:14:28,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:14:28,047 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:14:28,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:14:28,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1889059966, now seen corresponding path program 1 times [2021-11-13 18:14:28,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:14:28,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [500558138] [2021-11-13 18:14:28,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:14:28,050 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:14:28,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:14:28,053 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:14:28,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 18:14:30,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:14:30,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 1172 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:14:30,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:14:30,623 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 18:14:30,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:14:30,859 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 18:14:30,860 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:14:30,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [500558138] [2021-11-13 18:14:30,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [500558138] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:14:30,860 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:14:30,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 18:14:30,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480263329] [2021-11-13 18:14:30,861 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:14:30,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:14:30,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:14:30,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:14:30,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:14:30,862 INFO L87 Difference]: Start difference. First operand 54486 states and 79356 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 18:14:33,025 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.16s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:14:35,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:14:35,220 INFO L93 Difference]: Finished difference Result 108964 states and 158697 transitions. [2021-11-13 18:14:35,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:14:35,221 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 92 [2021-11-13 18:14:35,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:14:35,722 INFO L225 Difference]: With dead ends: 108964 [2021-11-13 18:14:35,723 INFO L226 Difference]: Without dead ends: 54493 [2021-11-13 18:14:35,891 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 181 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 18:14:35,892 INFO L933 BasicCegarLoop]: 3305 mSDtfsCounter, 1620 mSDsluCounter, 1702 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2175.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1620 SdHoareTripleChecker+Valid, 5007 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.89ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2223.23ms IncrementalHoareTripleChecker+Time [2021-11-13 18:14:35,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1620 Valid, 5007 Invalid, 10 Unknown, 0 Unchecked, 7.89ms Time], IncrementalHoareTripleChecker [2 Valid, 7 Invalid, 1 Unknown, 0 Unchecked, 2223.23ms Time] [2021-11-13 18:14:35,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54493 states. [2021-11-13 18:14:38,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54493 to 54467. [2021-11-13 18:14:38,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54467 states, 37624 states have (on average 1.3671858388262812) internal successors, (51439), 38874 states have internal predecessors, (51439), 13926 states have call successors, (13926), 2912 states have call predecessors, (13926), 2916 states have return successors, (13954), 13730 states have call predecessors, (13954), 13906 states have call successors, (13954) [2021-11-13 18:14:39,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54467 states to 54467 states and 79319 transitions. [2021-11-13 18:14:39,168 INFO L78 Accepts]: Start accepts. Automaton has 54467 states and 79319 transitions. Word has length 92 [2021-11-13 18:14:39,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:14:39,168 INFO L470 AbstractCegarLoop]: Abstraction has 54467 states and 79319 transitions. [2021-11-13 18:14:39,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 3 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-13 18:14:39,169 INFO L276 IsEmpty]: Start isEmpty. Operand 54467 states and 79319 transitions. [2021-11-13 18:14:39,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-13 18:14:39,191 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:14:39,191 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-11-13 18:14:39,238 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 18:14:39,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:14:39,411 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:14:39,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:14:39,412 INFO L85 PathProgramCache]: Analyzing trace with hash -617932082, now seen corresponding path program 1 times [2021-11-13 18:14:39,413 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:14:39,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [707189944] [2021-11-13 18:14:39,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:14:39,414 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:14:39,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:14:39,414 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:14:39,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 18:14:41,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:14:41,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 1210 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-13 18:14:41,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:14:42,827 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-13 18:14:42,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:14:46,649 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-13 18:14:46,649 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:14:46,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [707189944] [2021-11-13 18:14:46,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [707189944] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 18:14:46,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:14:46,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [13] total 24 [2021-11-13 18:14:46,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025490391] [2021-11-13 18:14:46,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:14:46,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-13 18:14:46,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:14:46,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-13 18:14:46,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-11-13 18:14:46,652 INFO L87 Difference]: Start difference. First operand 54467 states and 79319 transitions. Second operand has 14 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 5 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-13 18:14:49,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:14:49,907 INFO L93 Difference]: Finished difference Result 82978 states and 120858 transitions. [2021-11-13 18:14:49,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-13 18:14:49,907 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 5 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) Word has length 109 [2021-11-13 18:14:49,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:14:50,072 INFO L225 Difference]: With dead ends: 82978 [2021-11-13 18:14:50,072 INFO L226 Difference]: Without dead ends: 28526 [2021-11-13 18:14:50,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2021-11-13 18:14:50,238 INFO L933 BasicCegarLoop]: 1904 mSDtfsCounter, 232 mSDsluCounter, 20650 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 646.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 22554 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 33.34ms SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 717.89ms IncrementalHoareTripleChecker+Time [2021-11-13 18:14:50,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 22554 Invalid, 201 Unknown, 0 Unchecked, 33.34ms Time], IncrementalHoareTripleChecker [4 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 717.89ms Time] [2021-11-13 18:14:50,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28526 states. [2021-11-13 18:14:51,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28526 to 26157. [2021-11-13 18:14:51,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26157 states, 18059 states have (on average 1.3665208483304723) internal successors, (24678), 18653 states have internal predecessors, (24678), 6696 states have call successors, (6696), 1408 states have call predecessors, (6696), 1401 states have return successors, (6690), 6599 states have call predecessors, (6690), 6684 states have call successors, (6690) [2021-11-13 18:14:51,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26157 states to 26157 states and 38064 transitions. [2021-11-13 18:14:51,762 INFO L78 Accepts]: Start accepts. Automaton has 26157 states and 38064 transitions. Word has length 109 [2021-11-13 18:14:51,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:14:51,763 INFO L470 AbstractCegarLoop]: Abstraction has 26157 states and 38064 transitions. [2021-11-13 18:14:51,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 5.636363636363637) internal successors, (62), 10 states have internal predecessors, (62), 5 states have call successors, (17), 2 states have call predecessors, (17), 6 states have return successors, (15), 7 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-13 18:14:51,763 INFO L276 IsEmpty]: Start isEmpty. Operand 26157 states and 38064 transitions. [2021-11-13 18:14:51,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-13 18:14:51,770 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:14:51,770 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:14:51,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 18:14:51,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:14:51,974 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:14:51,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:14:51,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1801608750, now seen corresponding path program 1 times [2021-11-13 18:14:51,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:14:51,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [757719313] [2021-11-13 18:14:51,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:14:51,976 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:14:51,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:14:51,978 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:14:51,980 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 18:14:53,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:14:54,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 1185 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 18:14:54,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:14:54,316 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 18:14:54,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:14:54,557 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 18:14:54,558 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:14:54,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [757719313] [2021-11-13 18:14:54,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [757719313] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:14:54,558 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:14:54,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-13 18:14:54,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227847995] [2021-11-13 18:14:54,558 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:14:54,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:14:54,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:14:54,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:14:54,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:14:54,559 INFO L87 Difference]: Start difference. First operand 26157 states and 38064 transitions. Second operand has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 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 18:14:56,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:14:56,294 INFO L93 Difference]: Finished difference Result 50277 states and 73372 transitions. [2021-11-13 18:14:56,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:14:56,295 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 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 104 [2021-11-13 18:14:56,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:14:56,386 INFO L225 Difference]: With dead ends: 50277 [2021-11-13 18:14:56,386 INFO L226 Difference]: Without dead ends: 24135 [2021-11-13 18:14:56,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:14:56,465 INFO L933 BasicCegarLoop]: 2176 mSDtfsCounter, 1365 mSDsluCounter, 7947 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 364.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1424 SdHoareTripleChecker+Valid, 10123 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.27ms SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 456.73ms IncrementalHoareTripleChecker+Time [2021-11-13 18:14:56,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1424 Valid, 10123 Invalid, 461 Unknown, 0 Unchecked, 18.27ms Time], IncrementalHoareTripleChecker [429 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 456.73ms Time] [2021-11-13 18:14:56,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24135 states. [2021-11-13 18:14:57,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24135 to 19670. [2021-11-13 18:14:57,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19670 states, 13581 states have (on average 1.3657315367056917) internal successors, (18548), 14025 states have internal predecessors, (18548), 5030 states have call successors, (5030), 1066 states have call predecessors, (5030), 1058 states have return successors, (5023), 4956 states have call predecessors, (5023), 5020 states have call successors, (5023) [2021-11-13 18:14:57,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19670 states to 19670 states and 28601 transitions. [2021-11-13 18:14:57,673 INFO L78 Accepts]: Start accepts. Automaton has 19670 states and 28601 transitions. Word has length 104 [2021-11-13 18:14:57,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:14:57,673 INFO L470 AbstractCegarLoop]: Abstraction has 19670 states and 28601 transitions. [2021-11-13 18:14:57,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.666666666666666) internal successors, (70), 6 states have internal predecessors, (70), 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 18:14:57,673 INFO L276 IsEmpty]: Start isEmpty. Operand 19670 states and 28601 transitions. [2021-11-13 18:14:57,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-13 18:14:57,678 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:14:57,679 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-11-13 18:14:57,707 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 18:14:57,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:14:57,879 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:14:57,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:14:57,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1289039656, now seen corresponding path program 1 times [2021-11-13 18:14:57,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:14:57,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1114725345] [2021-11-13 18:14:57,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:14:57,881 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:14:57,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:14:57,882 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:14:57,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 18:14:59,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:14:59,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 1188 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 18:14:59,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:15:00,249 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 18:15:00,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:15:00,456 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-13 18:15:00,456 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:15:00,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1114725345] [2021-11-13 18:15:00,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1114725345] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:15:00,456 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:15:00,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-13 18:15:00,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762166018] [2021-11-13 18:15:00,456 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:15:00,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:15:00,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:15:00,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:15:00,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:15:00,458 INFO L87 Difference]: Start difference. First operand 19670 states and 28601 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 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 18:15:01,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:15:01,520 INFO L93 Difference]: Finished difference Result 22933 states and 33508 transitions. [2021-11-13 18:15:01,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:15:01,521 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 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 104 [2021-11-13 18:15:01,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:15:01,580 INFO L225 Difference]: With dead ends: 22933 [2021-11-13 18:15:01,581 INFO L226 Difference]: Without dead ends: 13147 [2021-11-13 18:15:01,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:15:01,609 INFO L933 BasicCegarLoop]: 2011 mSDtfsCounter, 917 mSDsluCounter, 7553 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 244.20ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 977 SdHoareTripleChecker+Valid, 9564 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.69ms SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 297.01ms IncrementalHoareTripleChecker+Time [2021-11-13 18:15:01,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [977 Valid, 9564 Invalid, 271 Unknown, 0 Unchecked, 10.69ms Time], IncrementalHoareTripleChecker [239 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 297.01ms Time] [2021-11-13 18:15:01,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13147 states. [2021-11-13 18:15:02,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13147 to 12087. [2021-11-13 18:15:02,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12087 states, 8349 states have (on average 1.3632770391663673) internal successors, (11382), 8620 states have internal predecessors, (11382), 3081 states have call successors, (3081), 660 states have call predecessors, (3081), 656 states have return successors, (3076), 3037 states have call predecessors, (3076), 3073 states have call successors, (3076) [2021-11-13 18:15:02,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12087 states to 12087 states and 17539 transitions. [2021-11-13 18:15:02,474 INFO L78 Accepts]: Start accepts. Automaton has 12087 states and 17539 transitions. Word has length 104 [2021-11-13 18:15:02,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:15:02,475 INFO L470 AbstractCegarLoop]: Abstraction has 12087 states and 17539 transitions. [2021-11-13 18:15:02,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 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 18:15:02,475 INFO L276 IsEmpty]: Start isEmpty. Operand 12087 states and 17539 transitions. [2021-11-13 18:15:02,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-13 18:15:02,481 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:15:02,481 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-11-13 18:15:02,515 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 18:15:02,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:15:02,686 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:15:02,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:15:02,687 INFO L85 PathProgramCache]: Analyzing trace with hash 602249427, now seen corresponding path program 1 times [2021-11-13 18:15:02,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:15:02,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1839320546] [2021-11-13 18:15:02,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:15:02,689 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:15:02,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:15:02,689 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:15:02,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 18:15:04,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:04,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 1191 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 18:15:04,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:15:05,068 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-13 18:15:05,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:15:05,262 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-13 18:15:05,262 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:15:05,262 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1839320546] [2021-11-13 18:15:05,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1839320546] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:15:05,262 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:15:05,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-13 18:15:05,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179207434] [2021-11-13 18:15:05,263 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:15:05,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:15:05,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:15:05,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:15:05,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:15:05,267 INFO L87 Difference]: Start difference. First operand 12087 states and 17539 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-13 18:15:06,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:15:06,166 INFO L93 Difference]: Finished difference Result 13220 states and 19352 transitions. [2021-11-13 18:15:06,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:15:06,167 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) Word has length 107 [2021-11-13 18:15:06,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:15:06,203 INFO L225 Difference]: With dead ends: 13220 [2021-11-13 18:15:06,203 INFO L226 Difference]: Without dead ends: 9961 [2021-11-13 18:15:06,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 211 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:15:06,217 INFO L933 BasicCegarLoop]: 2193 mSDtfsCounter, 843 mSDsluCounter, 7648 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 250.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 905 SdHoareTripleChecker+Valid, 9841 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.68ms SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 299.70ms IncrementalHoareTripleChecker+Time [2021-11-13 18:15:06,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [905 Valid, 9841 Invalid, 298 Unknown, 0 Unchecked, 10.68ms Time], IncrementalHoareTripleChecker [259 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 299.70ms Time] [2021-11-13 18:15:06,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9961 states. [2021-11-13 18:15:06,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9961 to 8855. [2021-11-13 18:15:06,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8855 states, 6119 states have (on average 1.360843275044942) internal successors, (8327), 6318 states have internal predecessors, (8327), 2251 states have call successors, (2251), 487 states have call predecessors, (2251), 484 states have return successors, (2246), 2217 states have call predecessors, (2246), 2243 states have call successors, (2246) [2021-11-13 18:15:06,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8855 states to 8855 states and 12824 transitions. [2021-11-13 18:15:06,743 INFO L78 Accepts]: Start accepts. Automaton has 8855 states and 12824 transitions. Word has length 107 [2021-11-13 18:15:06,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:15:06,744 INFO L470 AbstractCegarLoop]: Abstraction has 8855 states and 12824 transitions. [2021-11-13 18:15:06,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-13 18:15:06,744 INFO L276 IsEmpty]: Start isEmpty. Operand 8855 states and 12824 transitions. [2021-11-13 18:15:06,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-13 18:15:06,751 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:15:06,751 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:15:06,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 18:15:06,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:15:06,967 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:15:06,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:15:06,968 INFO L85 PathProgramCache]: Analyzing trace with hash -455362982, now seen corresponding path program 1 times [2021-11-13 18:15:06,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:15:06,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [731881213] [2021-11-13 18:15:06,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:15:06,969 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:15:06,970 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:15:06,970 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:15:06,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 18:15:08,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:09,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 1203 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 18:15:09,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:15:09,329 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-13 18:15:09,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:15:09,528 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-13 18:15:09,528 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:15:09,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [731881213] [2021-11-13 18:15:09,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [731881213] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:15:09,528 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:15:09,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 6 [2021-11-13 18:15:09,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962341197] [2021-11-13 18:15:09,529 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:15:09,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 18:15:09,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:15:09,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 18:15:09,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:15:09,531 INFO L87 Difference]: Start difference. First operand 8855 states and 12824 transitions. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 18:15:10,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:15:10,346 INFO L93 Difference]: Finished difference Result 17683 states and 25611 transitions. [2021-11-13 18:15:10,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 18:15:10,347 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 110 [2021-11-13 18:15:10,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:15:10,374 INFO L225 Difference]: With dead ends: 17683 [2021-11-13 18:15:10,374 INFO L226 Difference]: Without dead ends: 8843 [2021-11-13 18:15:10,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-11-13 18:15:10,393 INFO L933 BasicCegarLoop]: 1995 mSDtfsCounter, 789 mSDsluCounter, 6944 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 217.56ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 790 SdHoareTripleChecker+Valid, 8939 SdHoareTripleChecker+Invalid, 267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.57ms SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 261.98ms IncrementalHoareTripleChecker+Time [2021-11-13 18:15:10,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [790 Valid, 8939 Invalid, 267 Unknown, 0 Unchecked, 9.57ms Time], IncrementalHoareTripleChecker [243 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 261.98ms Time] [2021-11-13 18:15:10,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8843 states. [2021-11-13 18:15:10,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8843 to 8837. [2021-11-13 18:15:10,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8837 states, 6107 states have (on average 1.3608973309317176) internal successors, (8311), 6306 states have internal predecessors, (8311), 2247 states have call successors, (2247), 483 states have call predecessors, (2247), 482 states have return successors, (2242), 2215 states have call predecessors, (2242), 2239 states have call successors, (2242) [2021-11-13 18:15:10,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8837 states to 8837 states and 12800 transitions. [2021-11-13 18:15:10,787 INFO L78 Accepts]: Start accepts. Automaton has 8837 states and 12800 transitions. Word has length 110 [2021-11-13 18:15:10,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:15:10,787 INFO L470 AbstractCegarLoop]: Abstraction has 8837 states and 12800 transitions. [2021-11-13 18:15:10,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 2 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-13 18:15:10,788 INFO L276 IsEmpty]: Start isEmpty. Operand 8837 states and 12800 transitions. [2021-11-13 18:15:10,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-13 18:15:10,795 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:15:10,796 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-11-13 18:15:10,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-13 18:15:11,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:15:11,019 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:15:11,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:15:11,020 INFO L85 PathProgramCache]: Analyzing trace with hash -845367944, now seen corresponding path program 1 times [2021-11-13 18:15:11,021 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:15:11,021 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1212690953] [2021-11-13 18:15:11,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:15:11,021 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:15:11,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:15:11,022 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:15:11,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-13 18:15:12,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:13,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 1193 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 18:15:13,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:15:13,444 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-13 18:15:13,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:15:13,669 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-13 18:15:13,669 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:15:13,669 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1212690953] [2021-11-13 18:15:13,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1212690953] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:15:13,670 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:15:13,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2021-11-13 18:15:13,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077380298] [2021-11-13 18:15:13,670 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:15:13,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:15:13,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:15:13,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:15:13,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:15:13,671 INFO L87 Difference]: Start difference. First operand 8837 states and 12800 transitions. Second operand has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-13 18:15:15,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:15:15,061 INFO L93 Difference]: Finished difference Result 16605 states and 24036 transitions. [2021-11-13 18:15:15,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 18:15:15,062 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) Word has length 109 [2021-11-13 18:15:15,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:15:15,093 INFO L225 Difference]: With dead ends: 16605 [2021-11-13 18:15:15,093 INFO L226 Difference]: Without dead ends: 7783 [2021-11-13 18:15:15,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-11-13 18:15:15,115 INFO L933 BasicCegarLoop]: 1924 mSDtfsCounter, 2692 mSDsluCounter, 8667 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 317 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 621.09ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2692 SdHoareTripleChecker+Valid, 10591 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.24ms SdHoareTripleChecker+Time, 317 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 728.41ms IncrementalHoareTripleChecker+Time [2021-11-13 18:15:15,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2692 Valid, 10591 Invalid, 427 Unknown, 0 Unchecked, 16.24ms Time], IncrementalHoareTripleChecker [317 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 728.41ms Time] [2021-11-13 18:15:15,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7783 states. [2021-11-13 18:15:15,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7783 to 7783. [2021-11-13 18:15:15,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7783 states, 5378 states have (on average 1.358683525474154) internal successors, (7307), 5552 states have internal predecessors, (7307), 1975 states have call successors, (1975), 430 states have call predecessors, (1975), 429 states have return successors, (1971), 1947 states have call predecessors, (1971), 1968 states have call successors, (1971) [2021-11-13 18:15:15,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7783 states to 7783 states and 11253 transitions. [2021-11-13 18:15:15,496 INFO L78 Accepts]: Start accepts. Automaton has 7783 states and 11253 transitions. Word has length 109 [2021-11-13 18:15:15,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:15:15,497 INFO L470 AbstractCegarLoop]: Abstraction has 7783 states and 11253 transitions. [2021-11-13 18:15:15,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.25) internal successors, (66), 8 states have internal predecessors, (66), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 1 states have call predecessors, (11), 1 states have call successors, (11) [2021-11-13 18:15:15,497 INFO L276 IsEmpty]: Start isEmpty. Operand 7783 states and 11253 transitions. [2021-11-13 18:15:15,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-13 18:15:15,506 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:15:15,507 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-11-13 18:15:15,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-13 18:15:15,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:15:15,729 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:15:15,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:15:15,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1694153764, now seen corresponding path program 1 times [2021-11-13 18:15:15,731 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:15:15,731 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1647553073] [2021-11-13 18:15:15,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:15:15,732 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:15:15,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:15:15,732 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:15:15,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 18:15:17,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:17,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 1223 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 18:15:17,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:15:18,309 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 18:15:18,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:15:18,609 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-13 18:15:18,610 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:15:18,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1647553073] [2021-11-13 18:15:18,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1647553073] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:15:18,610 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:15:18,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 18:15:18,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522380285] [2021-11-13 18:15:18,611 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:15:18,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:15:18,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:15:18,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:15:18,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:15:18,612 INFO L87 Difference]: Start difference. First operand 7783 states and 11253 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-13 18:15:20,789 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.17s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2021-11-13 18:15:21,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:15:21,189 INFO L93 Difference]: Finished difference Result 7787 states and 11255 transitions. [2021-11-13 18:15:21,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:15:21,190 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) Word has length 120 [2021-11-13 18:15:21,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:15:21,221 INFO L225 Difference]: With dead ends: 7787 [2021-11-13 18:15:21,221 INFO L226 Difference]: Without dead ends: 7784 [2021-11-13 18:15:21,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 237 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 18:15:21,227 INFO L933 BasicCegarLoop]: 3284 mSDtfsCounter, 1600 mSDsluCounter, 1649 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2181.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1600 SdHoareTripleChecker+Valid, 4933 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.69ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2238.84ms IncrementalHoareTripleChecker+Time [2021-11-13 18:15:21,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1600 Valid, 4933 Invalid, 4 Unknown, 0 Unchecked, 6.69ms Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 1 Unknown, 0 Unchecked, 2238.84ms Time] [2021-11-13 18:15:21,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7784 states. [2021-11-13 18:15:21,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7784 to 7782. [2021-11-13 18:15:21,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7782 states, 5378 states have (on average 1.3581256972852362) internal successors, (7304), 5551 states have internal predecessors, (7304), 1974 states have call successors, (1974), 430 states have call predecessors, (1974), 429 states have return successors, (1971), 1947 states have call predecessors, (1971), 1968 states have call successors, (1971) [2021-11-13 18:15:21,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7782 states to 7782 states and 11249 transitions. [2021-11-13 18:15:21,661 INFO L78 Accepts]: Start accepts. Automaton has 7782 states and 11249 transitions. Word has length 120 [2021-11-13 18:15:21,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:15:21,661 INFO L470 AbstractCegarLoop]: Abstraction has 7782 states and 11249 transitions. [2021-11-13 18:15:21,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 2 states have call predecessors, (18), 2 states have call successors, (18) [2021-11-13 18:15:21,662 INFO L276 IsEmpty]: Start isEmpty. Operand 7782 states and 11249 transitions. [2021-11-13 18:15:21,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-13 18:15:21,671 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:15:21,671 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 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] [2021-11-13 18:15:21,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-13 18:15:21,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:15:21,887 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:15:21,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:15:21,888 INFO L85 PathProgramCache]: Analyzing trace with hash -485833321, now seen corresponding path program 1 times [2021-11-13 18:15:21,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:15:21,891 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1630671485] [2021-11-13 18:15:21,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:15:21,891 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:15:21,891 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:15:21,894 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:15:21,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-13 18:15:24,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:24,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 1239 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 18:15:24,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:15:24,785 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-11-13 18:15:24,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:15:25,057 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-13 18:15:25,057 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:15:25,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1630671485] [2021-11-13 18:15:25,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1630671485] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:15:25,058 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:15:25,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 8 [2021-11-13 18:15:25,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609126635] [2021-11-13 18:15:25,058 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:15:25,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:15:25,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:15:25,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:15:25,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:15:25,059 INFO L87 Difference]: Start difference. First operand 7782 states and 11249 transitions. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-13 18:15:27,246 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 18:15:28,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:15:28,049 INFO L93 Difference]: Finished difference Result 10220 states and 14684 transitions. [2021-11-13 18:15:28,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-13 18:15:28,050 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 124 [2021-11-13 18:15:28,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:15:28,066 INFO L225 Difference]: With dead ends: 10220 [2021-11-13 18:15:28,066 INFO L226 Difference]: Without dead ends: 3412 [2021-11-13 18:15:28,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-11-13 18:15:28,086 INFO L933 BasicCegarLoop]: 1682 mSDtfsCounter, 23 mSDsluCounter, 10068 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 8 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2309.28ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 11750 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.07ms SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2381.05ms IncrementalHoareTripleChecker+Time [2021-11-13 18:15:28,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 11750 Invalid, 57 Unknown, 0 Unchecked, 14.07ms Time], IncrementalHoareTripleChecker [8 Valid, 48 Invalid, 1 Unknown, 0 Unchecked, 2381.05ms Time] [2021-11-13 18:15:28,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3412 states. [2021-11-13 18:15:28,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3412 to 3365. [2021-11-13 18:15:28,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3365 states, 2322 states have (on average 1.355297157622739) internal successors, (3147), 2397 states have internal predecessors, (3147), 855 states have call successors, (855), 188 states have call predecessors, (855), 187 states have return successors, (851), 842 states have call predecessors, (851), 851 states have call successors, (851) [2021-11-13 18:15:28,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3365 states to 3365 states and 4853 transitions. [2021-11-13 18:15:28,379 INFO L78 Accepts]: Start accepts. Automaton has 3365 states and 4853 transitions. Word has length 124 [2021-11-13 18:15:28,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:15:28,380 INFO L470 AbstractCegarLoop]: Abstraction has 3365 states and 4853 transitions. [2021-11-13 18:15:28,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2021-11-13 18:15:28,380 INFO L276 IsEmpty]: Start isEmpty. Operand 3365 states and 4853 transitions. [2021-11-13 18:15:28,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-13 18:15:28,393 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:15:28,394 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:15:28,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-13 18:15:28,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:15:28,619 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:15:28,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:15:28,620 INFO L85 PathProgramCache]: Analyzing trace with hash 2031280561, now seen corresponding path program 1 times [2021-11-13 18:15:28,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:15:28,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [768063671] [2021-11-13 18:15:28,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:15:28,623 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:15:28,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:15:28,624 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:15:28,632 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-13 18:15:30,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:15:31,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 1242 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:15:31,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:15:31,296 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-13 18:15:31,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:15:31,571 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-13 18:15:31,571 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-13 18:15:31,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [768063671] [2021-11-13 18:15:31,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [768063671] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 18:15:31,571 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:15:31,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 18:15:31,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599783881] [2021-11-13 18:15:31,572 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 18:15:31,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:15:31,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-13 18:15:31,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:15:31,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:15:31,573 INFO L87 Difference]: Start difference. First operand 3365 states and 4853 transitions. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-13 18:15:33,768 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 18:15:35,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:15:35,228 INFO L93 Difference]: Finished difference Result 3367 states and 4854 transitions. [2021-11-13 18:15:35,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:15:35,229 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 130 [2021-11-13 18:15:35,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:15:35,239 INFO L225 Difference]: With dead ends: 3367 [2021-11-13 18:15:35,239 INFO L226 Difference]: Without dead ends: 2267 [2021-11-13 18:15:35,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 256 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 18:15:35,244 INFO L933 BasicCegarLoop]: 3123 mSDtfsCounter, 2636 mSDsluCounter, 1623 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 561 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3127.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2636 SdHoareTripleChecker+Valid, 4746 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.46ms SdHoareTripleChecker+Time, 561 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3417.66ms IncrementalHoareTripleChecker+Time [2021-11-13 18:15:35,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2636 Valid, 4746 Invalid, 590 Unknown, 0 Unchecked, 12.46ms Time], IncrementalHoareTripleChecker [561 Valid, 28 Invalid, 1 Unknown, 0 Unchecked, 3417.66ms Time] [2021-11-13 18:15:35,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2267 states. [2021-11-13 18:15:35,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2267 to 2267. [2021-11-13 18:15:35,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2267 states, 1567 states have (on average 1.349074664964901) internal successors, (2114), 1616 states have internal predecessors, (2114), 573 states have call successors, (573), 127 states have call predecessors, (573), 126 states have return successors, (571), 565 states have call predecessors, (571), 571 states have call successors, (571) [2021-11-13 18:15:35,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2267 states to 2267 states and 3258 transitions. [2021-11-13 18:15:35,436 INFO L78 Accepts]: Start accepts. Automaton has 2267 states and 3258 transitions. Word has length 130 [2021-11-13 18:15:35,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:15:35,437 INFO L470 AbstractCegarLoop]: Abstraction has 2267 states and 3258 transitions. [2021-11-13 18:15:35,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2021-11-13 18:15:35,437 INFO L276 IsEmpty]: Start isEmpty. Operand 2267 states and 3258 transitions. [2021-11-13 18:15:35,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-13 18:15:35,445 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:15:35,445 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 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] [2021-11-13 18:15:35,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-13 18:15:35,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 [2021-11-13 18:15:35,671 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:15:35,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:15:35,672 INFO L85 PathProgramCache]: Analyzing trace with hash -443454606, now seen corresponding path program 1 times [2021-11-13 18:15:35,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-13 18:15:35,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1801611232] [2021-11-13 18:15:35,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:15:35,674 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 18:15:35,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat [2021-11-13 18:15:35,675 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 18:15:35,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8aca4cb-9219-454e-8bda-2c0941af4ac5/bin/uautomizer-YU5uOKAj3y/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process