./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 cb8f0ebb3c2471fcffc912ab6e7b9ec5c4e0cbee8604050053df01c587aed5a7 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 22:48:50,429 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 22:48:50,431 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 22:48:50,457 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 22:48:50,457 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 22:48:50,458 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 22:48:50,460 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 22:48:50,461 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 22:48:50,462 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 22:48:50,463 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 22:48:50,464 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 22:48:50,465 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 22:48:50,465 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 22:48:50,466 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 22:48:50,467 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 22:48:50,468 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 22:48:50,468 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 22:48:50,469 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 22:48:50,470 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 22:48:50,472 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 22:48:50,473 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 22:48:50,474 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 22:48:50,475 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 22:48:50,475 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 22:48:50,476 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 22:48:50,478 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 22:48:50,479 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 22:48:50,479 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 22:48:50,486 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 22:48:50,487 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 22:48:50,487 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 22:48:50,488 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 22:48:50,488 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 22:48:50,489 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 22:48:50,490 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 22:48:50,490 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 22:48:50,491 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 22:48:50,491 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 22:48:50,491 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 22:48:50,492 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 22:48:50,492 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 22:48:50,494 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 22:48:50,494 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2022-07-19 22:48:50,518 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 22:48:50,519 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 22:48:50,519 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 22:48:50,519 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 22:48:50,520 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 22:48:50,520 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 22:48:50,520 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 22:48:50,521 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 22:48:50,521 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 22:48:50,522 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 22:48:50,522 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 22:48:50,522 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 22:48:50,522 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 22:48:50,522 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 22:48:50,522 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 22:48:50,523 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 22:48:50,523 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 22:48:50,523 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 22:48:50,523 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 22:48:50,524 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 22:48:50,524 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 22:48:50,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 22:48:50,525 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 22:48:50,525 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 22:48:50,525 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 22:48:50,525 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 22:48:50,526 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 22:48:50,526 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 22:48:50,526 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 22:48:50,526 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 22:48:50,526 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb8f0ebb3c2471fcffc912ab6e7b9ec5c4e0cbee8604050053df01c587aed5a7 [2022-07-19 22:48:50,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 22:48:50,773 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 22:48:50,776 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 22:48:50,777 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 22:48:50,777 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 22:48:50,779 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i [2022-07-19 22:48:50,840 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3ba1390f/d8b7ae698a7540f18dbb3d882b40116b/FLAG13191f7e8 [2022-07-19 22:48:51,483 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 22:48:51,484 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i [2022-07-19 22:48:51,515 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3ba1390f/d8b7ae698a7540f18dbb3d882b40116b/FLAG13191f7e8 [2022-07-19 22:48:51,636 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f3ba1390f/d8b7ae698a7540f18dbb3d882b40116b [2022-07-19 22:48:51,638 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 22:48:51,640 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 22:48:51,641 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 22:48:51,641 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 22:48:51,643 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 22:48:51,644 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:48:51" (1/1) ... [2022-07-19 22:48:51,645 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@167a42b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:48:51, skipping insertion in model container [2022-07-19 22:48:51,645 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 10:48:51" (1/1) ... [2022-07-19 22:48:51,650 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 22:48:51,723 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 22:48:52,742 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i[158757,158770] [2022-07-19 22:48:52,784 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 22:48:52,820 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 22:48:52,983 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-commit-tester/m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i[158757,158770] [2022-07-19 22:48:52,990 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 22:48:53,030 INFO L208 MainTranslator]: Completed translation [2022-07-19 22:48:53,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:48:53 WrapperNode [2022-07-19 22:48:53,030 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 22:48:53,031 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 22:48:53,032 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 22:48:53,032 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 22:48:53,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:48:53" (1/1) ... [2022-07-19 22:48:53,120 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:48:53" (1/1) ... [2022-07-19 22:48:53,261 INFO L137 Inliner]: procedures = 191, calls = 1268, calls flagged for inlining = 83, calls inlined = 83, statements flattened = 3442 [2022-07-19 22:48:53,262 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 22:48:53,263 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 22:48:53,263 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 22:48:53,263 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 22:48:53,271 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:48:53" (1/1) ... [2022-07-19 22:48:53,271 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:48:53" (1/1) ... [2022-07-19 22:48:53,292 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:48:53" (1/1) ... [2022-07-19 22:48:53,293 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:48:53" (1/1) ... [2022-07-19 22:48:53,381 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:48:53" (1/1) ... [2022-07-19 22:48:53,446 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:48:53" (1/1) ... [2022-07-19 22:48:53,473 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:48:53" (1/1) ... [2022-07-19 22:48:53,505 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 22:48:53,507 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 22:48:53,507 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 22:48:53,507 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 22:48:53,508 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:48:53" (1/1) ... [2022-07-19 22:48:53,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 22:48:53,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:48:53,545 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-19 22:48:53,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-19 22:48:53,585 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_free [2022-07-19 22:48:53,585 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_free [2022-07-19 22:48:53,585 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~TO~int [2022-07-19 22:48:53,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~TO~int [2022-07-19 22:48:53,585 INFO L130 BoogieDeclarations]: Found specification of procedure list_empty [2022-07-19 22:48:53,585 INFO L138 BoogieDeclarations]: Found implementation of procedure list_empty [2022-07-19 22:48:53,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-07-19 22:48:53,585 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2022-07-19 22:48:53,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2022-07-19 22:48:53,586 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-19 22:48:53,586 INFO L130 BoogieDeclarations]: Found specification of procedure get_gadget_data [2022-07-19 22:48:53,586 INFO L138 BoogieDeclarations]: Found implementation of procedure get_gadget_data [2022-07-19 22:48:53,586 INFO L130 BoogieDeclarations]: Found specification of procedure printer_poll [2022-07-19 22:48:53,586 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_poll [2022-07-19 22:48:53,587 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memcpy [2022-07-19 22:48:53,587 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memcpy [2022-07-19 22:48:53,587 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_free_request [2022-07-19 22:48:53,587 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_free_request [2022-07-19 22:48:53,587 INFO L130 BoogieDeclarations]: Found specification of procedure printer_reset_interface [2022-07-19 22:48:53,587 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_reset_interface [2022-07-19 22:48:53,587 INFO L130 BoogieDeclarations]: Found specification of procedure get_current [2022-07-19 22:48:53,588 INFO L138 BoogieDeclarations]: Found implementation of procedure get_current [2022-07-19 22:48:53,588 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2022-07-19 22:48:53,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2022-07-19 22:48:53,588 INFO L130 BoogieDeclarations]: Found specification of procedure printer_soft_reset [2022-07-19 22:48:53,588 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_soft_reset [2022-07-19 22:48:53,588 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_nonpositive_int [2022-07-19 22:48:53,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_nonpositive_int [2022-07-19 22:48:53,589 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_class [2022-07-19 22:48:53,589 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_class [2022-07-19 22:48:53,589 INFO L130 BoogieDeclarations]: Found specification of procedure list_del_init [2022-07-19 22:48:53,589 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del_init [2022-07-19 22:48:53,589 INFO L130 BoogieDeclarations]: Found specification of procedure set_printer_interface [2022-07-19 22:48:53,589 INFO L138 BoogieDeclarations]: Found implementation of procedure set_printer_interface [2022-07-19 22:48:53,589 INFO L130 BoogieDeclarations]: Found specification of procedure setup_rx_reqs [2022-07-19 22:48:53,590 INFO L138 BoogieDeclarations]: Found implementation of procedure setup_rx_reqs [2022-07-19 22:48:53,590 INFO L130 BoogieDeclarations]: Found specification of procedure class_destroy [2022-07-19 22:48:53,590 INFO L138 BoogieDeclarations]: Found implementation of procedure class_destroy [2022-07-19 22:48:53,590 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-19 22:48:53,590 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2022-07-19 22:48:53,590 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2022-07-19 22:48:53,590 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2022-07-19 22:48:53,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2022-07-19 22:48:53,591 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_queue [2022-07-19 22:48:53,591 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_queue [2022-07-19 22:48:53,591 INFO L130 BoogieDeclarations]: Found specification of procedure set_interface [2022-07-19 22:48:53,591 INFO L138 BoogieDeclarations]: Found implementation of procedure set_interface [2022-07-19 22:48:53,591 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup_complete [2022-07-19 22:48:53,592 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup_complete [2022-07-19 22:48:53,592 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_return_value [2022-07-19 22:48:53,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_return_value [2022-07-19 22:48:53,592 INFO L130 BoogieDeclarations]: Found specification of procedure ldv__builtin_expect [2022-07-19 22:48:53,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv__builtin_expect [2022-07-19 22:48:53,592 INFO L130 BoogieDeclarations]: Found specification of procedure usb_gadget_vbus_draw [2022-07-19 22:48:53,593 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_gadget_vbus_draw [2022-07-19 22:48:53,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-19 22:48:53,594 INFO L130 BoogieDeclarations]: Found specification of procedure strrchr [2022-07-19 22:48:53,594 INFO L130 BoogieDeclarations]: Found specification of procedure printer_unbind [2022-07-19 22:48:53,594 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_unbind [2022-07-19 22:48:53,595 INFO L130 BoogieDeclarations]: Found specification of procedure kmem_cache_alloc_notrace [2022-07-19 22:48:53,596 INFO L130 BoogieDeclarations]: Found specification of procedure spinlock_check [2022-07-19 22:48:53,596 INFO L138 BoogieDeclarations]: Found implementation of procedure spinlock_check [2022-07-19 22:48:53,596 INFO L130 BoogieDeclarations]: Found specification of procedure printer_close [2022-07-19 22:48:53,596 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_close [2022-07-19 22:48:53,597 INFO L130 BoogieDeclarations]: Found specification of procedure __list_add [2022-07-19 22:48:53,597 INFO L138 BoogieDeclarations]: Found implementation of procedure __list_add [2022-07-19 22:48:53,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 22:48:53,597 INFO L130 BoogieDeclarations]: Found specification of procedure poll_wait [2022-07-19 22:48:53,597 INFO L138 BoogieDeclarations]: Found implementation of procedure poll_wait [2022-07-19 22:48:53,598 INFO L130 BoogieDeclarations]: Found specification of procedure printer_fsync [2022-07-19 22:48:53,598 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_fsync [2022-07-19 22:48:53,598 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-19 22:48:53,599 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-07-19 22:48:53,599 INFO L130 BoogieDeclarations]: Found specification of procedure INIT_LIST_HEAD [2022-07-19 22:48:53,599 INFO L138 BoogieDeclarations]: Found implementation of procedure INIT_LIST_HEAD [2022-07-19 22:48:53,599 INFO L130 BoogieDeclarations]: Found specification of procedure __bad_percpu_size [2022-07-19 22:48:53,599 INFO L130 BoogieDeclarations]: Found specification of procedure init_utsname [2022-07-19 22:48:53,599 INFO L138 BoogieDeclarations]: Found implementation of procedure init_utsname [2022-07-19 22:48:53,600 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_enable [2022-07-19 22:48:53,600 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_enable [2022-07-19 22:48:53,600 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-07-19 22:48:53,600 INFO L130 BoogieDeclarations]: Found specification of procedure rcu_read_lock_sched_notrace [2022-07-19 22:48:53,600 INFO L138 BoogieDeclarations]: Found implementation of procedure rcu_read_lock_sched_notrace [2022-07-19 22:48:53,600 INFO L130 BoogieDeclarations]: Found specification of procedure printer_open [2022-07-19 22:48:53,601 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_open [2022-07-19 22:48:53,601 INFO L130 BoogieDeclarations]: Found specification of procedure printer_bind [2022-07-19 22:48:53,601 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_bind [2022-07-19 22:48:53,601 INFO L130 BoogieDeclarations]: Found specification of procedure __wake_up [2022-07-19 22:48:53,601 INFO L138 BoogieDeclarations]: Found implementation of procedure __wake_up [2022-07-19 22:48:53,602 INFO L130 BoogieDeclarations]: Found specification of procedure strlcpy [2022-07-19 22:48:53,602 INFO L138 BoogieDeclarations]: Found implementation of procedure strlcpy [2022-07-19 22:48:53,602 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2022-07-19 22:48:53,602 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2022-07-19 22:48:53,602 INFO L130 BoogieDeclarations]: Found specification of procedure signal_pending [2022-07-19 22:48:53,603 INFO L138 BoogieDeclarations]: Found implementation of procedure signal_pending [2022-07-19 22:48:53,604 INFO L130 BoogieDeclarations]: Found specification of procedure spin_unlock_irqrestore [2022-07-19 22:48:53,604 INFO L138 BoogieDeclarations]: Found implementation of procedure spin_unlock_irqrestore [2022-07-19 22:48:53,604 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2022-07-19 22:48:53,604 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2022-07-19 22:48:53,604 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_autoconfig [2022-07-19 22:48:53,605 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_autoconfig [2022-07-19 22:48:53,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-19 22:48:53,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2022-07-19 22:48:53,605 INFO L130 BoogieDeclarations]: Found specification of procedure trace_kmalloc [2022-07-19 22:48:53,605 INFO L138 BoogieDeclarations]: Found implementation of procedure trace_kmalloc [2022-07-19 22:48:53,605 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2022-07-19 22:48:53,605 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2022-07-19 22:48:53,606 INFO L130 BoogieDeclarations]: Found specification of procedure prepare_to_wait [2022-07-19 22:48:53,606 INFO L138 BoogieDeclarations]: Found implementation of procedure prepare_to_wait [2022-07-19 22:48:53,606 INFO L130 BoogieDeclarations]: Found specification of procedure warn_slowpath_null [2022-07-19 22:48:53,606 INFO L138 BoogieDeclarations]: Found implementation of procedure warn_slowpath_null [2022-07-19 22:48:53,606 INFO L130 BoogieDeclarations]: Found specification of procedure printer_setup [2022-07-19 22:48:53,607 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_setup [2022-07-19 22:48:53,607 INFO L130 BoogieDeclarations]: Found specification of procedure list_del [2022-07-19 22:48:53,608 INFO L138 BoogieDeclarations]: Found implementation of procedure list_del [2022-07-19 22:48:53,608 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_chrdev_region [2022-07-19 22:48:53,608 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_chrdev_region [2022-07-19 22:48:53,608 INFO L130 BoogieDeclarations]: Found specification of procedure kmalloc [2022-07-19 22:48:53,609 INFO L138 BoogieDeclarations]: Found implementation of procedure kmalloc [2022-07-19 22:48:53,611 INFO L130 BoogieDeclarations]: Found specification of procedure _raw_spin_lock_irqsave [2022-07-19 22:48:53,611 INFO L138 BoogieDeclarations]: Found implementation of procedure _raw_spin_lock_irqsave [2022-07-19 22:48:53,611 INFO L130 BoogieDeclarations]: Found specification of procedure set_gadget_data [2022-07-19 22:48:53,612 INFO L138 BoogieDeclarations]: Found implementation of procedure set_gadget_data [2022-07-19 22:48:53,613 INFO L130 BoogieDeclarations]: Found specification of procedure printer_req_alloc [2022-07-19 22:48:53,614 INFO L138 BoogieDeclarations]: Found implementation of procedure printer_req_alloc [2022-07-19 22:48:53,614 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-07-19 22:48:53,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2022-07-19 22:48:53,614 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock_nested [2022-07-19 22:48:53,617 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock_nested [2022-07-19 22:48:53,618 INFO L130 BoogieDeclarations]: Found specification of procedure usb_ep_disable [2022-07-19 22:48:53,618 INFO L138 BoogieDeclarations]: Found implementation of procedure usb_ep_disable [2022-07-19 22:48:53,618 INFO L130 BoogieDeclarations]: Found specification of procedure __init_waitqueue_head [2022-07-19 22:48:53,618 INFO L138 BoogieDeclarations]: Found implementation of procedure __init_waitqueue_head [2022-07-19 22:48:53,618 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_unregister_chrdev_region [2022-07-19 22:48:53,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_unregister_chrdev_region [2022-07-19 22:48:53,618 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 22:48:53,619 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_handler_precall [2022-07-19 22:48:53,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_handler_precall [2022-07-19 22:48:53,619 INFO L130 BoogieDeclarations]: Found specification of procedure schedule [2022-07-19 22:48:53,619 INFO L138 BoogieDeclarations]: Found implementation of procedure schedule [2022-07-19 22:48:53,619 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2022-07-19 22:48:53,619 INFO L130 BoogieDeclarations]: Found specification of procedure _copy_from_user [2022-07-19 22:48:53,620 INFO L138 BoogieDeclarations]: Found implementation of procedure _copy_from_user [2022-07-19 22:48:53,620 INFO L130 BoogieDeclarations]: Found specification of procedure finish_wait [2022-07-19 22:48:53,620 INFO L138 BoogieDeclarations]: Found implementation of procedure finish_wait [2022-07-19 22:48:53,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 22:48:53,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 22:48:53,620 INFO L130 BoogieDeclarations]: Found specification of procedure IS_ERR [2022-07-19 22:48:53,620 INFO L138 BoogieDeclarations]: Found implementation of procedure IS_ERR [2022-07-19 22:48:54,148 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 22:48:54,151 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 22:49:08,317 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 22:49:08,338 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 22:49:08,338 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-19 22:49:08,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:49:08 BoogieIcfgContainer [2022-07-19 22:49:08,341 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 22:49:08,344 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 22:49:08,344 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 22:49:08,346 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 22:49:08,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 10:48:51" (1/3) ... [2022-07-19 22:49:08,347 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68a01479 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:49:08, skipping insertion in model container [2022-07-19 22:49:08,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 10:48:53" (2/3) ... [2022-07-19 22:49:08,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68a01479 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 10:49:08, skipping insertion in model container [2022-07-19 22:49:08,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 10:49:08" (3/3) ... [2022-07-19 22:49:08,349 INFO L111 eAbstractionObserver]: Analyzing ICFG m0_drivers-usb-gadget-g_printer-ko--106_1a--2b9ec6c-1.i [2022-07-19 22:49:08,361 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 22:49:08,361 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 22:49:08,462 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 22:49:08,470 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@45bfda7, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@731d7745 [2022-07-19 22:49:08,470 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 22:49:08,479 INFO L276 IsEmpty]: Start isEmpty. Operand has 1278 states, 894 states have (on average 1.407158836689038) internal successors, (1258), 934 states have internal predecessors, (1258), 317 states have call successors, (317), 65 states have call predecessors, (317), 65 states have return successors, (317), 314 states have call predecessors, (317), 317 states have call successors, (317) [2022-07-19 22:49:08,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-19 22:49:08,486 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:49:08,487 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:49:08,487 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:49:08,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:49:08,492 INFO L85 PathProgramCache]: Analyzing trace with hash -1087819150, now seen corresponding path program 1 times [2022-07-19 22:49:08,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:49:08,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206967299] [2022-07-19 22:49:08,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:49:08,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:49:08,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:49:09,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:49:09,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:49:09,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:49:09,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:49:09,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 22:49:09,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:49:09,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206967299] [2022-07-19 22:49:09,198 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206967299] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:49:09,198 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:49:09,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 22:49:09,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099010947] [2022-07-19 22:49:09,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:49:09,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 22:49:09,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:49:09,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 22:49:09,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 22:49:09,237 INFO L87 Difference]: Start difference. First operand has 1278 states, 894 states have (on average 1.407158836689038) internal successors, (1258), 934 states have internal predecessors, (1258), 317 states have call successors, (317), 65 states have call predecessors, (317), 65 states have return successors, (317), 314 states have call predecessors, (317), 317 states have call successors, (317) Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 22:49:11,312 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 22:49:16,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:49:16,567 INFO L93 Difference]: Finished difference Result 4165 states and 6365 transitions. [2022-07-19 22:49:16,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 22:49:16,570 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-07-19 22:49:16,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:49:16,602 INFO L225 Difference]: With dead ends: 4165 [2022-07-19 22:49:16,603 INFO L226 Difference]: Without dead ends: 2887 [2022-07-19 22:49:16,618 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 22:49:16,621 INFO L413 NwaCegarLoop]: 2055 mSDtfsCounter, 3067 mSDsluCounter, 2190 mSDsCounter, 0 mSdLazyCounter, 1392 mSolverCounterSat, 923 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3363 SdHoareTripleChecker+Valid, 4245 SdHoareTripleChecker+Invalid, 2316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 923 IncrementalHoareTripleChecker+Valid, 1392 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-07-19 22:49:16,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3363 Valid, 4245 Invalid, 2316 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [923 Valid, 1392 Invalid, 1 Unknown, 0 Unchecked, 6.9s Time] [2022-07-19 22:49:16,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2887 states. [2022-07-19 22:49:16,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2887 to 2330. [2022-07-19 22:49:16,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2330 states, 1616 states have (on average 1.3545792079207921) internal successors, (2189), 1674 states have internal predecessors, (2189), 593 states have call successors, (593), 122 states have call predecessors, (593), 120 states have return successors, (584), 577 states have call predecessors, (584), 584 states have call successors, (584) [2022-07-19 22:49:16,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 3366 transitions. [2022-07-19 22:49:16,819 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 3366 transitions. Word has length 17 [2022-07-19 22:49:16,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:49:16,820 INFO L495 AbstractCegarLoop]: Abstraction has 2330 states and 3366 transitions. [2022-07-19 22:49:16,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 22:49:16,820 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 3366 transitions. [2022-07-19 22:49:16,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-19 22:49:16,821 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:49:16,822 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:49:16,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 22:49:16,822 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:49:16,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:49:16,823 INFO L85 PathProgramCache]: Analyzing trace with hash 636307650, now seen corresponding path program 1 times [2022-07-19 22:49:16,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:49:16,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360694115] [2022-07-19 22:49:16,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:49:16,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:49:16,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:49:17,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:49:17,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:49:17,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:49:17,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:49:17,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 22:49:17,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:49:17,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360694115] [2022-07-19 22:49:17,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360694115] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:49:17,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:49:17,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 22:49:17,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127682388] [2022-07-19 22:49:17,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:49:17,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 22:49:17,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:49:17,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 22:49:17,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 22:49:17,068 INFO L87 Difference]: Start difference. First operand 2330 states and 3366 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 22:49:19,100 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 22:49:24,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:49:24,630 INFO L93 Difference]: Finished difference Result 6873 states and 10148 transitions. [2022-07-19 22:49:24,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 22:49:24,631 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-07-19 22:49:24,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:49:24,669 INFO L225 Difference]: With dead ends: 6873 [2022-07-19 22:49:24,670 INFO L226 Difference]: Without dead ends: 5734 [2022-07-19 22:49:24,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 22:49:24,679 INFO L413 NwaCegarLoop]: 3011 mSDtfsCounter, 2517 mSDsluCounter, 2463 mSDsCounter, 0 mSdLazyCounter, 1424 mSolverCounterSat, 770 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2810 SdHoareTripleChecker+Valid, 5474 SdHoareTripleChecker+Invalid, 2195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 770 IncrementalHoareTripleChecker+Valid, 1424 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-07-19 22:49:24,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2810 Valid, 5474 Invalid, 2195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [770 Valid, 1424 Invalid, 1 Unknown, 0 Unchecked, 7.2s Time] [2022-07-19 22:49:24,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5734 states. [2022-07-19 22:49:24,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5734 to 4620. [2022-07-19 22:49:24,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4620 states, 3209 states have (on average 1.3549392334060455) internal successors, (4348), 3319 states have internal predecessors, (4348), 1171 states have call successors, (1171), 243 states have call predecessors, (1171), 239 states have return successors, (1159), 1145 states have call predecessors, (1159), 1159 states have call successors, (1159) [2022-07-19 22:49:24,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4620 states to 4620 states and 6678 transitions. [2022-07-19 22:49:24,877 INFO L78 Accepts]: Start accepts. Automaton has 4620 states and 6678 transitions. Word has length 18 [2022-07-19 22:49:24,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:49:24,877 INFO L495 AbstractCegarLoop]: Abstraction has 4620 states and 6678 transitions. [2022-07-19 22:49:24,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-19 22:49:24,878 INFO L276 IsEmpty]: Start isEmpty. Operand 4620 states and 6678 transitions. [2022-07-19 22:49:24,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-19 22:49:24,879 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:49:24,879 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:49:24,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 22:49:24,880 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:49:24,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:49:24,880 INFO L85 PathProgramCache]: Analyzing trace with hash 312341314, now seen corresponding path program 1 times [2022-07-19 22:49:24,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:49:24,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23441202] [2022-07-19 22:49:24,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:49:24,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:49:25,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:49:25,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:49:25,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:49:25,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:49:25,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:49:25,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-07-19 22:49:25,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:49:25,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:49:25,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:49:25,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 22:49:25,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:49:25,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23441202] [2022-07-19 22:49:25,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23441202] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:49:25,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:49:25,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 22:49:25,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282281712] [2022-07-19 22:49:25,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:49:25,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 22:49:25,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:49:25,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 22:49:25,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 22:49:25,190 INFO L87 Difference]: Start difference. First operand 4620 states and 6678 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 22:49:27,219 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 22:49:31,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:49:31,941 INFO L93 Difference]: Finished difference Result 12536 states and 18549 transitions. [2022-07-19 22:49:31,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 22:49:31,942 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2022-07-19 22:49:31,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:49:32,012 INFO L225 Difference]: With dead ends: 12536 [2022-07-19 22:49:32,013 INFO L226 Difference]: Without dead ends: 11382 [2022-07-19 22:49:32,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 22:49:32,027 INFO L413 NwaCegarLoop]: 2293 mSDtfsCounter, 2930 mSDsluCounter, 1991 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 929 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3219 SdHoareTripleChecker+Valid, 4284 SdHoareTripleChecker+Invalid, 2343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 929 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-07-19 22:49:32,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3219 Valid, 4284 Invalid, 2343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [929 Valid, 1413 Invalid, 1 Unknown, 0 Unchecked, 6.4s Time] [2022-07-19 22:49:32,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11382 states. [2022-07-19 22:49:32,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11382 to 8047. [2022-07-19 22:49:32,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8047 states, 5595 states have (on average 1.3549597855227882) internal successors, (7581), 5785 states have internal predecessors, (7581), 2033 states have call successors, (2033), 424 states have call predecessors, (2033), 418 states have return successors, (2019), 1991 states have call predecessors, (2019), 2019 states have call successors, (2019) [2022-07-19 22:49:32,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8047 states to 8047 states and 11633 transitions. [2022-07-19 22:49:32,427 INFO L78 Accepts]: Start accepts. Automaton has 8047 states and 11633 transitions. Word has length 36 [2022-07-19 22:49:32,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:49:32,427 INFO L495 AbstractCegarLoop]: Abstraction has 8047 states and 11633 transitions. [2022-07-19 22:49:32,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-07-19 22:49:32,429 INFO L276 IsEmpty]: Start isEmpty. Operand 8047 states and 11633 transitions. [2022-07-19 22:49:32,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-19 22:49:32,434 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:49:32,434 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:49:32,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 22:49:32,435 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:49:32,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:49:32,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1062377866, now seen corresponding path program 1 times [2022-07-19 22:49:32,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:49:32,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039472201] [2022-07-19 22:49:32,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:49:32,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:49:32,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:49:32,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:49:32,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:49:32,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:49:32,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:49:32,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 22:49:32,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:49:33,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:49:33,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:49:33,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 22:49:33,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:49:33,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039472201] [2022-07-19 22:49:33,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039472201] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:49:33,330 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:49:33,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-19 22:49:33,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592983125] [2022-07-19 22:49:33,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:49:33,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 22:49:33,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:49:33,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 22:49:33,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2022-07-19 22:49:33,331 INFO L87 Difference]: Start difference. First operand 8047 states and 11633 transitions. Second operand has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-19 22:49:35,391 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 22:50:00,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:50:00,662 INFO L93 Difference]: Finished difference Result 23274 states and 34407 transitions. [2022-07-19 22:50:00,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 22:50:00,663 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 38 [2022-07-19 22:50:00,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:50:00,760 INFO L225 Difference]: With dead ends: 23274 [2022-07-19 22:50:00,760 INFO L226 Difference]: Without dead ends: 17598 [2022-07-19 22:50:00,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2022-07-19 22:50:00,795 INFO L413 NwaCegarLoop]: 2559 mSDtfsCounter, 3598 mSDsluCounter, 19708 mSDsCounter, 0 mSdLazyCounter, 13141 mSolverCounterSat, 1517 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3897 SdHoareTripleChecker+Valid, 22267 SdHoareTripleChecker+Invalid, 14659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1517 IncrementalHoareTripleChecker+Valid, 13141 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.9s IncrementalHoareTripleChecker+Time [2022-07-19 22:50:00,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3897 Valid, 22267 Invalid, 14659 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1517 Valid, 13141 Invalid, 1 Unknown, 0 Unchecked, 25.9s Time] [2022-07-19 22:50:00,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17598 states. [2022-07-19 22:50:01,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17598 to 11508. [2022-07-19 22:50:01,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11508 states, 7999 states have (on average 1.354544318039755) internal successors, (10835), 8269 states have internal predecessors, (10835), 2905 states have call successors, (2905), 610 states have call predecessors, (2905), 603 states have return successors, (2893), 2848 states have call predecessors, (2893), 2890 states have call successors, (2893) [2022-07-19 22:50:01,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11508 states to 11508 states and 16633 transitions. [2022-07-19 22:50:01,423 INFO L78 Accepts]: Start accepts. Automaton has 11508 states and 16633 transitions. Word has length 38 [2022-07-19 22:50:01,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:50:01,423 INFO L495 AbstractCegarLoop]: Abstraction has 11508 states and 16633 transitions. [2022-07-19 22:50:01,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 10 states have internal predecessors, (29), 4 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-19 22:50:01,424 INFO L276 IsEmpty]: Start isEmpty. Operand 11508 states and 16633 transitions. [2022-07-19 22:50:01,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-19 22:50:01,428 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:50:01,428 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-19 22:50:01,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 22:50:01,428 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:50:01,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:50:01,429 INFO L85 PathProgramCache]: Analyzing trace with hash -479641513, now seen corresponding path program 1 times [2022-07-19 22:50:01,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:50:01,429 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941546979] [2022-07-19 22:50:01,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:50:01,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:50:01,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:50:01,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:50:01,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:50:02,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:50:02,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:50:02,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:50:02,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:50:02,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-07-19 22:50:02,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:50:02,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:50:02,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:50:02,506 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 22:50:02,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:50:02,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941546979] [2022-07-19 22:50:02,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941546979] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:50:02,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:50:02,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-19 22:50:02,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160233615] [2022-07-19 22:50:02,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:50:02,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-19 22:50:02,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:50:02,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-19 22:50:02,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2022-07-19 22:50:02,508 INFO L87 Difference]: Start difference. First operand 11508 states and 16633 transitions. Second operand has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-19 22:50:04,543 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 22:50:31,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:50:31,936 INFO L93 Difference]: Finished difference Result 18438 states and 27352 transitions. [2022-07-19 22:50:31,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-19 22:50:31,936 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 45 [2022-07-19 22:50:31,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:50:32,027 INFO L225 Difference]: With dead ends: 18438 [2022-07-19 22:50:32,028 INFO L226 Difference]: Without dead ends: 17321 [2022-07-19 22:50:32,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=161, Invalid=1171, Unknown=0, NotChecked=0, Total=1332 [2022-07-19 22:50:32,047 INFO L413 NwaCegarLoop]: 2203 mSDtfsCounter, 4361 mSDsluCounter, 17890 mSDsCounter, 0 mSdLazyCounter, 14133 mSolverCounterSat, 1911 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4648 SdHoareTripleChecker+Valid, 20093 SdHoareTripleChecker+Invalid, 16045 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1911 IncrementalHoareTripleChecker+Valid, 14133 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.4s IncrementalHoareTripleChecker+Time [2022-07-19 22:50:32,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4648 Valid, 20093 Invalid, 16045 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1911 Valid, 14133 Invalid, 1 Unknown, 0 Unchecked, 27.4s Time] [2022-07-19 22:50:32,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17321 states. [2022-07-19 22:50:32,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17321 to 10399. [2022-07-19 22:50:32,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10399 states, 7231 states have (on average 1.3536163739455125) internal successors, (9788), 7475 states have internal predecessors, (9788), 2620 states have call successors, (2620), 554 states have call predecessors, (2620), 547 states have return successors, (2608), 2567 states have call predecessors, (2608), 2605 states have call successors, (2608) [2022-07-19 22:50:32,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10399 states to 10399 states and 15016 transitions. [2022-07-19 22:50:32,819 INFO L78 Accepts]: Start accepts. Automaton has 10399 states and 15016 transitions. Word has length 45 [2022-07-19 22:50:32,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:50:32,820 INFO L495 AbstractCegarLoop]: Abstraction has 10399 states and 15016 transitions. [2022-07-19 22:50:32,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 5 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-07-19 22:50:32,820 INFO L276 IsEmpty]: Start isEmpty. Operand 10399 states and 15016 transitions. [2022-07-19 22:50:32,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-19 22:50:32,821 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:50:32,822 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:50:32,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 22:50:32,822 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:50:32,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:50:32,823 INFO L85 PathProgramCache]: Analyzing trace with hash 80113123, now seen corresponding path program 1 times [2022-07-19 22:50:32,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:50:32,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312047546] [2022-07-19 22:50:32,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:50:32,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:50:32,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:50:33,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:50:33,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:50:33,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:50:33,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:50:33,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 22:50:33,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:50:33,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:50:33,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:50:33,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 22:50:33,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:50:33,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 22:50:33,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:50:33,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 22:50:33,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:50:33,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312047546] [2022-07-19 22:50:33,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312047546] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:50:33,069 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:50:33,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 22:50:33,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126450747] [2022-07-19 22:50:33,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:50:33,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 22:50:33,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:50:33,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 22:50:33,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 22:50:33,072 INFO L87 Difference]: Start difference. First operand 10399 states and 15016 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-19 22:50:35,103 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 22:50:37,193 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 22:50:41,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:50:41,977 INFO L93 Difference]: Finished difference Result 15673 states and 23232 transitions. [2022-07-19 22:50:41,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 22:50:41,977 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 52 [2022-07-19 22:50:41,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:50:42,070 INFO L225 Difference]: With dead ends: 15673 [2022-07-19 22:50:42,071 INFO L226 Difference]: Without dead ends: 15652 [2022-07-19 22:50:42,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 22:50:42,086 INFO L413 NwaCegarLoop]: 3242 mSDtfsCounter, 2419 mSDsluCounter, 2526 mSDsCounter, 0 mSdLazyCounter, 1441 mSolverCounterSat, 670 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2703 SdHoareTripleChecker+Valid, 5768 SdHoareTripleChecker+Invalid, 2113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 670 IncrementalHoareTripleChecker+Valid, 1441 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-07-19 22:50:42,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2703 Valid, 5768 Invalid, 2113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [670 Valid, 1441 Invalid, 2 Unknown, 0 Unchecked, 8.1s Time] [2022-07-19 22:50:42,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15652 states. [2022-07-19 22:50:42,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15652 to 8137. [2022-07-19 22:50:42,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8137 states, 5661 states have (on average 1.3511747041158806) internal successors, (7649), 5853 states have internal predecessors, (7649), 2046 states have call successors, (2046), 436 states have call predecessors, (2046), 429 states have return successors, (2036), 2001 states have call predecessors, (2036), 2033 states have call successors, (2036) [2022-07-19 22:50:42,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8137 states to 8137 states and 11731 transitions. [2022-07-19 22:50:42,768 INFO L78 Accepts]: Start accepts. Automaton has 8137 states and 11731 transitions. Word has length 52 [2022-07-19 22:50:42,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:50:42,770 INFO L495 AbstractCegarLoop]: Abstraction has 8137 states and 11731 transitions. [2022-07-19 22:50:42,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-07-19 22:50:42,770 INFO L276 IsEmpty]: Start isEmpty. Operand 8137 states and 11731 transitions. [2022-07-19 22:50:42,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-19 22:50:42,772 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:50:42,773 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-19 22:50:42,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 22:50:42,773 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:50:42,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:50:42,774 INFO L85 PathProgramCache]: Analyzing trace with hash 139061074, now seen corresponding path program 1 times [2022-07-19 22:50:42,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:50:42,774 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120854428] [2022-07-19 22:50:42,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:50:42,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:50:42,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:50:43,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:50:43,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:50:43,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:50:43,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:50:43,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:50:43,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:50:43,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 22:50:43,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:50:43,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:50:43,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:50:43,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-07-19 22:50:43,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:50:43,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:50:43,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:50:43,658 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 22:50:43,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:50:43,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120854428] [2022-07-19 22:50:43,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120854428] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:50:43,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:50:43,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-19 22:50:43,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915938615] [2022-07-19 22:50:43,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:50:43,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 22:50:43,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:50:43,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 22:50:43,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2022-07-19 22:50:43,661 INFO L87 Difference]: Start difference. First operand 8137 states and 11731 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-19 22:50:45,695 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 22:50:47,774 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 22:51:10,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:51:10,480 INFO L93 Difference]: Finished difference Result 13968 states and 20655 transitions. [2022-07-19 22:51:10,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-19 22:51:10,482 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) Word has length 53 [2022-07-19 22:51:10,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:51:10,537 INFO L225 Difference]: With dead ends: 13968 [2022-07-19 22:51:10,537 INFO L226 Difference]: Without dead ends: 12854 [2022-07-19 22:51:10,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2022-07-19 22:51:10,549 INFO L413 NwaCegarLoop]: 3054 mSDtfsCounter, 3169 mSDsluCounter, 21081 mSDsCounter, 0 mSdLazyCounter, 12985 mSolverCounterSat, 1279 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3464 SdHoareTripleChecker+Valid, 24135 SdHoareTripleChecker+Invalid, 14266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1279 IncrementalHoareTripleChecker+Valid, 12985 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.1s IncrementalHoareTripleChecker+Time [2022-07-19 22:51:10,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3464 Valid, 24135 Invalid, 14266 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1279 Valid, 12985 Invalid, 2 Unknown, 0 Unchecked, 25.1s Time] [2022-07-19 22:51:10,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12854 states. [2022-07-19 22:51:11,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12854 to 8135. [2022-07-19 22:51:11,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8135 states, 5659 states have (on average 1.351122106379219) internal successors, (7646), 5851 states have internal predecessors, (7646), 2046 states have call successors, (2046), 436 states have call predecessors, (2046), 429 states have return successors, (2036), 2001 states have call predecessors, (2036), 2033 states have call successors, (2036) [2022-07-19 22:51:11,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8135 states to 8135 states and 11728 transitions. [2022-07-19 22:51:11,199 INFO L78 Accepts]: Start accepts. Automaton has 8135 states and 11728 transitions. Word has length 53 [2022-07-19 22:51:11,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:51:11,199 INFO L495 AbstractCegarLoop]: Abstraction has 8135 states and 11728 transitions. [2022-07-19 22:51:11,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 12 states have internal predecessors, (35), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-07-19 22:51:11,200 INFO L276 IsEmpty]: Start isEmpty. Operand 8135 states and 11728 transitions. [2022-07-19 22:51:11,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-07-19 22:51:11,201 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:51:11,201 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-19 22:51:11,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 22:51:11,201 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:51:11,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:51:11,202 INFO L85 PathProgramCache]: Analyzing trace with hash -538213409, now seen corresponding path program 1 times [2022-07-19 22:51:11,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:51:11,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599322457] [2022-07-19 22:51:11,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:51:11,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:51:11,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:11,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:51:11,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:11,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:51:11,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:11,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 22:51:11,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:11,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-19 22:51:11,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:11,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:51:11,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:12,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-07-19 22:51:12,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:12,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 22:51:12,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:12,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-19 22:51:12,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:51:12,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599322457] [2022-07-19 22:51:12,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599322457] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:51:12,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:51:12,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-07-19 22:51:12,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180132117] [2022-07-19 22:51:12,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:51:12,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-19 22:51:12,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:51:12,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-19 22:51:12,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2022-07-19 22:51:12,074 INFO L87 Difference]: Start difference. First operand 8135 states and 11728 transitions. Second operand has 16 states, 14 states have (on average 2.857142857142857) internal successors, (40), 12 states have internal predecessors, (40), 5 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-19 22:51:14,112 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 22:51:16,175 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 22:51:32,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:51:32,073 INFO L93 Difference]: Finished difference Result 11758 states and 17237 transitions. [2022-07-19 22:51:32,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-19 22:51:32,074 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.857142857142857) internal successors, (40), 12 states have internal predecessors, (40), 5 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 56 [2022-07-19 22:51:32,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:51:32,101 INFO L225 Difference]: With dead ends: 11758 [2022-07-19 22:51:32,101 INFO L226 Difference]: Without dead ends: 7187 [2022-07-19 22:51:32,117 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2022-07-19 22:51:32,118 INFO L413 NwaCegarLoop]: 1679 mSDtfsCounter, 961 mSDsluCounter, 13966 mSDsCounter, 0 mSdLazyCounter, 8656 mSolverCounterSat, 372 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1160 SdHoareTripleChecker+Valid, 15645 SdHoareTripleChecker+Invalid, 9030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 8656 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.7s IncrementalHoareTripleChecker+Time [2022-07-19 22:51:32,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1160 Valid, 15645 Invalid, 9030 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [372 Valid, 8656 Invalid, 2 Unknown, 0 Unchecked, 18.7s Time] [2022-07-19 22:51:32,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7187 states. [2022-07-19 22:51:32,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7187 to 5809. [2022-07-19 22:51:32,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5809 states, 4038 states have (on average 1.3506686478454681) internal successors, (5454), 4173 states have internal predecessors, (5454), 1462 states have call successors, (1462), 313 states have call predecessors, (1462), 308 states have return successors, (1458), 1432 states have call predecessors, (1458), 1455 states have call successors, (1458) [2022-07-19 22:51:32,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5809 states to 5809 states and 8374 transitions. [2022-07-19 22:51:32,683 INFO L78 Accepts]: Start accepts. Automaton has 5809 states and 8374 transitions. Word has length 56 [2022-07-19 22:51:32,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:51:32,683 INFO L495 AbstractCegarLoop]: Abstraction has 5809 states and 8374 transitions. [2022-07-19 22:51:32,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.857142857142857) internal successors, (40), 12 states have internal predecessors, (40), 5 states have call successors, (9), 3 states have call predecessors, (9), 4 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2022-07-19 22:51:32,684 INFO L276 IsEmpty]: Start isEmpty. Operand 5809 states and 8374 transitions. [2022-07-19 22:51:32,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-19 22:51:32,685 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:51:32,685 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 22:51:32,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 22:51:32,686 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:51:32,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:51:32,686 INFO L85 PathProgramCache]: Analyzing trace with hash 762935669, now seen corresponding path program 1 times [2022-07-19 22:51:32,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:51:32,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018864116] [2022-07-19 22:51:32,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:51:32,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:51:32,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:32,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:51:32,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:33,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:51:33,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:33,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 22:51:33,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:33,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:51:33,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:33,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 22:51:33,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:33,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-19 22:51:33,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:33,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-07-19 22:51:33,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:33,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 22:51:33,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:51:33,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018864116] [2022-07-19 22:51:33,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018864116] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:51:33,061 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:51:33,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-19 22:51:33,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573948107] [2022-07-19 22:51:33,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:51:33,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-19 22:51:33,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:51:33,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-19 22:51:33,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-07-19 22:51:33,063 INFO L87 Difference]: Start difference. First operand 5809 states and 8374 transitions. Second operand has 8 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 22:51:35,125 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 22:51:37,144 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 22:51:52,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:51:52,604 INFO L93 Difference]: Finished difference Result 9365 states and 13991 transitions. [2022-07-19 22:51:52,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 22:51:52,605 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 64 [2022-07-19 22:51:52,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:51:52,637 INFO L225 Difference]: With dead ends: 9365 [2022-07-19 22:51:52,638 INFO L226 Difference]: Without dead ends: 8228 [2022-07-19 22:51:52,646 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-07-19 22:51:52,647 INFO L413 NwaCegarLoop]: 2232 mSDtfsCounter, 3300 mSDsluCounter, 3636 mSDsCounter, 0 mSdLazyCounter, 7875 mSolverCounterSat, 1862 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3535 SdHoareTripleChecker+Valid, 5868 SdHoareTripleChecker+Invalid, 9739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1862 IncrementalHoareTripleChecker+Valid, 7875 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.6s IncrementalHoareTripleChecker+Time [2022-07-19 22:51:52,647 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3535 Valid, 5868 Invalid, 9739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1862 Valid, 7875 Invalid, 2 Unknown, 0 Unchecked, 18.6s Time] [2022-07-19 22:51:52,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8228 states. [2022-07-19 22:51:53,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8228 to 5798. [2022-07-19 22:51:53,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5798 states, 4032 states have (on average 1.3504464285714286) internal successors, (5445), 4165 states have internal predecessors, (5445), 1457 states have call successors, (1457), 313 states have call predecessors, (1457), 308 states have return successors, (1454), 1429 states have call predecessors, (1454), 1451 states have call successors, (1454) [2022-07-19 22:51:53,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5798 states to 5798 states and 8356 transitions. [2022-07-19 22:51:53,249 INFO L78 Accepts]: Start accepts. Automaton has 5798 states and 8356 transitions. Word has length 64 [2022-07-19 22:51:53,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:51:53,249 INFO L495 AbstractCegarLoop]: Abstraction has 5798 states and 8356 transitions. [2022-07-19 22:51:53,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.125) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (8), 4 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 22:51:53,249 INFO L276 IsEmpty]: Start isEmpty. Operand 5798 states and 8356 transitions. [2022-07-19 22:51:53,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-19 22:51:53,250 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:51:53,250 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-19 22:51:53,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-19 22:51:53,251 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:51:53,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:51:53,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1307494641, now seen corresponding path program 1 times [2022-07-19 22:51:53,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:51:53,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836411046] [2022-07-19 22:51:53,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:51:53,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:51:53,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:53,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:51:53,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:53,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:51:53,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:53,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 22:51:53,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:53,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:51:53,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:53,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 22:51:53,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:53,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:51:53,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:51:53,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 22:51:53,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:51:53,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836411046] [2022-07-19 22:51:53,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836411046] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:51:53,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:51:53,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-19 22:51:53,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698136152] [2022-07-19 22:51:53,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:51:53,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 22:51:53,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:51:53,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 22:51:53,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 22:51:53,497 INFO L87 Difference]: Start difference. First operand 5798 states and 8356 transitions. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-19 22:51:55,528 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 22:52:00,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:52:00,344 INFO L93 Difference]: Finished difference Result 7437 states and 11043 transitions. [2022-07-19 22:52:00,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 22:52:00,345 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 63 [2022-07-19 22:52:00,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:52:00,368 INFO L225 Difference]: With dead ends: 7437 [2022-07-19 22:52:00,368 INFO L226 Difference]: Without dead ends: 7432 [2022-07-19 22:52:00,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2022-07-19 22:52:00,371 INFO L413 NwaCegarLoop]: 2136 mSDtfsCounter, 1356 mSDsluCounter, 4437 mSDsCounter, 0 mSdLazyCounter, 2425 mSolverCounterSat, 679 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1547 SdHoareTripleChecker+Valid, 6573 SdHoareTripleChecker+Invalid, 3105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 679 IncrementalHoareTripleChecker+Valid, 2425 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-07-19 22:52:00,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1547 Valid, 6573 Invalid, 3105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [679 Valid, 2425 Invalid, 1 Unknown, 0 Unchecked, 6.2s Time] [2022-07-19 22:52:00,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7432 states. [2022-07-19 22:52:00,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7432 to 5792. [2022-07-19 22:52:00,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5792 states, 4027 states have (on average 1.3498882542835857) internal successors, (5436), 4159 states have internal predecessors, (5436), 1456 states have call successors, (1456), 313 states have call predecessors, (1456), 308 states have return successors, (1454), 1429 states have call predecessors, (1454), 1451 states have call successors, (1454) [2022-07-19 22:52:00,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5792 states to 5792 states and 8346 transitions. [2022-07-19 22:52:00,906 INFO L78 Accepts]: Start accepts. Automaton has 5792 states and 8346 transitions. Word has length 63 [2022-07-19 22:52:00,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:52:00,907 INFO L495 AbstractCegarLoop]: Abstraction has 5792 states and 8346 transitions. [2022-07-19 22:52:00,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 5 states have internal predecessors, (46), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-07-19 22:52:00,907 INFO L276 IsEmpty]: Start isEmpty. Operand 5792 states and 8346 transitions. [2022-07-19 22:52:00,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-07-19 22:52:00,908 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:52:00,909 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-19 22:52:00,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-19 22:52:00,909 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:52:00,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:52:00,910 INFO L85 PathProgramCache]: Analyzing trace with hash -384487029, now seen corresponding path program 1 times [2022-07-19 22:52:00,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:52:00,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702302260] [2022-07-19 22:52:00,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:52:00,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:52:01,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:01,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:52:01,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:01,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:52:01,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:01,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 22:52:01,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:01,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:52:01,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:01,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 22:52:01,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:01,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-07-19 22:52:01,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:01,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-19 22:52:01,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:01,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 22:52:01,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:52:01,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702302260] [2022-07-19 22:52:01,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702302260] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 22:52:01,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977485995] [2022-07-19 22:52:01,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:52:01,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 22:52:01,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 22:52:01,308 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 22:52:01,310 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 22:52:02,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:02,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 2168 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-19 22:52:02,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 22:52:02,391 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 22:52:02,392 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 22:52:02,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977485995] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:52:02,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 22:52:02,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [11] total 15 [2022-07-19 22:52:02,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743172382] [2022-07-19 22:52:02,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:52:02,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 22:52:02,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:52:02,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 22:52:02,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2022-07-19 22:52:02,394 INFO L87 Difference]: Start difference. First operand 5792 states and 8346 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 22:52:03,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:52:03,189 INFO L93 Difference]: Finished difference Result 7744 states and 11292 transitions. [2022-07-19 22:52:03,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 22:52:03,189 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 66 [2022-07-19 22:52:03,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:52:03,245 INFO L225 Difference]: With dead ends: 7744 [2022-07-19 22:52:03,245 INFO L226 Difference]: Without dead ends: 4324 [2022-07-19 22:52:03,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-07-19 22:52:03,251 INFO L413 NwaCegarLoop]: 2124 mSDtfsCounter, 948 mSDsluCounter, 7614 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1061 SdHoareTripleChecker+Valid, 9738 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 445 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 22:52:03,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1061 Valid, 9738 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [445 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 22:52:03,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4324 states. [2022-07-19 22:52:03,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4324 to 3544. [2022-07-19 22:52:03,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3544 states, 2468 states have (on average 1.342382495948136) internal successors, (3313), 2546 states have internal predecessors, (3313), 880 states have call successors, (880), 198 states have call predecessors, (880), 195 states have return successors, (879), 865 states have call predecessors, (879), 876 states have call successors, (879) [2022-07-19 22:52:03,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3544 states to 3544 states and 5072 transitions. [2022-07-19 22:52:03,560 INFO L78 Accepts]: Start accepts. Automaton has 3544 states and 5072 transitions. Word has length 66 [2022-07-19 22:52:03,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:52:03,560 INFO L495 AbstractCegarLoop]: Abstraction has 3544 states and 5072 transitions. [2022-07-19 22:52:03,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 6 states have internal predecessors, (50), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 22:52:03,560 INFO L276 IsEmpty]: Start isEmpty. Operand 3544 states and 5072 transitions. [2022-07-19 22:52:03,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-19 22:52:03,561 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:52:03,562 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-19 22:52:03,591 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 22:52:03,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-07-19 22:52:03,775 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:52:03,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:52:03,776 INFO L85 PathProgramCache]: Analyzing trace with hash -2013478679, now seen corresponding path program 1 times [2022-07-19 22:52:03,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:52:03,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541600471] [2022-07-19 22:52:03,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:52:03,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:52:03,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:04,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:52:04,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:04,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:52:04,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:04,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 22:52:04,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:04,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:52:04,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:04,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 22:52:04,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:04,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 22:52:04,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:04,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2022-07-19 22:52:04,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:04,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 22:52:04,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:52:04,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541600471] [2022-07-19 22:52:04,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541600471] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:52:04,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:52:04,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 22:52:04,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305867750] [2022-07-19 22:52:04,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:52:04,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 22:52:04,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:52:04,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 22:52:04,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 22:52:04,096 INFO L87 Difference]: Start difference. First operand 3544 states and 5072 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 22:52:06,128 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 22:52:13,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:52:13,129 INFO L93 Difference]: Finished difference Result 6888 states and 10119 transitions. [2022-07-19 22:52:13,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 22:52:13,129 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 69 [2022-07-19 22:52:13,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:52:13,141 INFO L225 Difference]: With dead ends: 6888 [2022-07-19 22:52:13,141 INFO L226 Difference]: Without dead ends: 4620 [2022-07-19 22:52:13,146 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2022-07-19 22:52:13,147 INFO L413 NwaCegarLoop]: 2746 mSDtfsCounter, 1604 mSDsluCounter, 7994 mSDsCounter, 0 mSdLazyCounter, 3634 mSolverCounterSat, 785 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1794 SdHoareTripleChecker+Valid, 10740 SdHoareTripleChecker+Invalid, 4420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 785 IncrementalHoareTripleChecker+Valid, 3634 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-07-19 22:52:13,147 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1794 Valid, 10740 Invalid, 4420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [785 Valid, 3634 Invalid, 1 Unknown, 0 Unchecked, 8.4s Time] [2022-07-19 22:52:13,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4620 states. [2022-07-19 22:52:13,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4620 to 3525. [2022-07-19 22:52:13,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3525 states, 2456 states have (on average 1.3424267100977199) internal successors, (3297), 2533 states have internal predecessors, (3297), 875 states have call successors, (875), 194 states have call predecessors, (875), 193 states have return successors, (875), 863 states have call predecessors, (875), 872 states have call successors, (875) [2022-07-19 22:52:13,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3525 states to 3525 states and 5047 transitions. [2022-07-19 22:52:13,439 INFO L78 Accepts]: Start accepts. Automaton has 3525 states and 5047 transitions. Word has length 69 [2022-07-19 22:52:13,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:52:13,440 INFO L495 AbstractCegarLoop]: Abstraction has 3525 states and 5047 transitions. [2022-07-19 22:52:13,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 6 states have internal predecessors, (49), 2 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-07-19 22:52:13,440 INFO L276 IsEmpty]: Start isEmpty. Operand 3525 states and 5047 transitions. [2022-07-19 22:52:13,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-19 22:52:13,441 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:52:13,441 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-19 22:52:13,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 22:52:13,442 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:52:13,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:52:13,442 INFO L85 PathProgramCache]: Analyzing trace with hash 1690739862, now seen corresponding path program 1 times [2022-07-19 22:52:13,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:52:13,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102529481] [2022-07-19 22:52:13,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:52:13,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:52:13,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:13,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:52:13,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:13,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:52:13,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:13,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 22:52:13,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:13,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:52:13,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:13,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 22:52:13,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:13,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-07-19 22:52:13,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:13,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 22:52:13,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:13,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-07-19 22:52:13,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:13,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-07-19 22:52:13,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:13,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 22:52:13,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:52:13,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102529481] [2022-07-19 22:52:13,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102529481] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:52:13,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:52:13,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-07-19 22:52:13,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799134387] [2022-07-19 22:52:13,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:52:13,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 22:52:13,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:52:13,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 22:52:13,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2022-07-19 22:52:13,992 INFO L87 Difference]: Start difference. First operand 3525 states and 5047 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 11 states have internal predecessors, (51), 3 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-19 22:52:16,023 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 22:52:18,050 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 22:52:39,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 22:52:39,892 INFO L93 Difference]: Finished difference Result 6571 states and 9626 transitions. [2022-07-19 22:52:39,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-19 22:52:39,893 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 11 states have internal predecessors, (51), 3 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 71 [2022-07-19 22:52:39,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 22:52:39,904 INFO L225 Difference]: With dead ends: 6571 [2022-07-19 22:52:39,904 INFO L226 Difference]: Without dead ends: 4321 [2022-07-19 22:52:39,909 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-07-19 22:52:39,909 INFO L413 NwaCegarLoop]: 1536 mSDtfsCounter, 2126 mSDsluCounter, 3788 mSDsCounter, 0 mSdLazyCounter, 13738 mSolverCounterSat, 892 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2366 SdHoareTripleChecker+Valid, 5324 SdHoareTripleChecker+Invalid, 14632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 892 IncrementalHoareTripleChecker+Valid, 13738 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.0s IncrementalHoareTripleChecker+Time [2022-07-19 22:52:39,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2366 Valid, 5324 Invalid, 14632 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [892 Valid, 13738 Invalid, 2 Unknown, 0 Unchecked, 25.0s Time] [2022-07-19 22:52:39,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4321 states. [2022-07-19 22:52:40,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4321 to 3495. [2022-07-19 22:52:40,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3495 states, 2434 states have (on average 1.3447000821692687) internal successors, (3273), 2511 states have internal predecessors, (3273), 871 states have call successors, (871), 190 states have call predecessors, (871), 189 states have return successors, (871), 859 states have call predecessors, (871), 868 states have call successors, (871) [2022-07-19 22:52:40,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3495 states to 3495 states and 5015 transitions. [2022-07-19 22:52:40,208 INFO L78 Accepts]: Start accepts. Automaton has 3495 states and 5015 transitions. Word has length 71 [2022-07-19 22:52:40,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 22:52:40,208 INFO L495 AbstractCegarLoop]: Abstraction has 3495 states and 5015 transitions. [2022-07-19 22:52:40,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 11 states have internal predecessors, (51), 3 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2022-07-19 22:52:40,208 INFO L276 IsEmpty]: Start isEmpty. Operand 3495 states and 5015 transitions. [2022-07-19 22:52:40,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-19 22:52:40,209 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 22:52:40,210 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-07-19 22:52:40,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 22:52:40,210 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 22:52:40,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 22:52:40,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1250189697, now seen corresponding path program 1 times [2022-07-19 22:52:40,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 22:52:40,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898530743] [2022-07-19 22:52:40,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 22:52:40,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 22:52:40,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:40,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 22:52:40,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:40,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-19 22:52:40,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:40,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-19 22:52:40,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:40,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2022-07-19 22:52:40,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:40,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-19 22:52:40,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:40,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-19 22:52:40,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:40,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-19 22:52:40,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:40,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-19 22:52:40,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:40,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-07-19 22:52:40,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 22:52:40,443 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 22:52:40,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 22:52:40,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898530743] [2022-07-19 22:52:40,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898530743] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 22:52:40,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 22:52:40,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 22:52:40,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644166717] [2022-07-19 22:52:40,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 22:52:40,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 22:52:40,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 22:52:40,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 22:52:40,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 22:52:40,446 INFO L87 Difference]: Start difference. First operand 3495 states and 5015 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-07-19 22:52:42,476 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2022-07-19 22:52:44,536 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers []