/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--ppp--pppox.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 07:31:58,165 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 07:31:58,166 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 07:31:58,191 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 07:31:58,191 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 07:31:58,193 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 07:31:58,195 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 07:31:58,197 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 07:31:58,198 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 07:31:58,201 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 07:31:58,202 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 07:31:58,203 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 07:31:58,203 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 07:31:58,205 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 07:31:58,206 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 07:31:58,207 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 07:31:58,208 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 07:31:58,208 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 07:31:58,210 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 07:31:58,213 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 07:31:58,214 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 07:31:58,215 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 07:31:58,216 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 07:31:58,217 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 07:31:58,222 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 07:31:58,222 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 07:31:58,223 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 07:31:58,223 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 07:31:58,223 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 07:31:58,224 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 07:31:58,224 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 07:31:58,224 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 07:31:58,225 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 07:31:58,225 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 07:31:58,226 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 07:31:58,226 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 07:31:58,226 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 07:31:58,226 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 07:31:58,227 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 07:31:58,227 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 07:31:58,227 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 07:31:58,231 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 07:31:58,253 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 07:31:58,253 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 07:31:58,253 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 07:31:58,253 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 07:31:58,254 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 07:31:58,254 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 07:31:58,254 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 07:31:58,254 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 07:31:58,254 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 07:31:58,254 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 07:31:58,254 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 07:31:58,254 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 07:31:58,254 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 07:31:58,254 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 07:31:58,255 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 07:31:58,255 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 07:31:58,255 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 07:31:58,255 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 07:31:58,255 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 07:31:58,255 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 07:31:58,255 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 07:31:58,255 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 07:31:58,255 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 07:31:58,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 07:31:58,256 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 07:31:58,256 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 07:31:58,256 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 07:31:58,256 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 07:31:58,256 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 07:31:58,256 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 07:31:58,256 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 07:31:58,256 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 07:31:58,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 07:31:58,256 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 07:31:58,256 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 07:31:58,257 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 07:31:58,257 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 07:31:58,257 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 07:31:58,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 07:31:58,257 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 07:31:58,257 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 07:31:58,257 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 07:31:58,461 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 07:31:58,474 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 07:31:58,475 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 07:31:58,476 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 07:31:58,476 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 07:31:58,477 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--ppp--pppox.ko-entry_point.cil.out.i [2023-04-01 07:31:59,459 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 07:31:59,784 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 07:31:59,784 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--ppp--pppox.ko-entry_point.cil.out.i [2023-04-01 07:31:59,815 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84f6254d1/f718b00e5b09464cae895bb808b0ae61/FLAG425439deb [2023-04-01 07:31:59,828 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/84f6254d1/f718b00e5b09464cae895bb808b0ae61 [2023-04-01 07:31:59,830 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 07:31:59,831 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 07:31:59,832 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 07:31:59,832 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 07:31:59,834 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 07:31:59,835 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 07:31:59" (1/1) ... [2023-04-01 07:31:59,836 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4acf4de3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:31:59, skipping insertion in model container [2023-04-01 07:31:59,836 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 07:31:59" (1/1) ... [2023-04-01 07:31:59,841 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 07:31:59,909 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 07:32:00,380 WARN L247 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-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--ppp--pppox.ko-entry_point.cil.out.i[183784,183797] [2023-04-01 07:32:00,422 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 07:32:00,477 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 07:32:00,584 WARN L247 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-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--ppp--pppox.ko-entry_point.cil.out.i[183784,183797] [2023-04-01 07:32:00,588 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 07:32:00,617 INFO L208 MainTranslator]: Completed translation [2023-04-01 07:32:00,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:32:00 WrapperNode [2023-04-01 07:32:00,617 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 07:32:00,618 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 07:32:00,618 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 07:32:00,618 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 07:32:00,625 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:32:00" (1/1) ... [2023-04-01 07:32:00,625 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:32:00" (1/1) ... [2023-04-01 07:32:00,650 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:32:00" (1/1) ... [2023-04-01 07:32:00,650 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:32:00" (1/1) ... [2023-04-01 07:32:00,681 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:32:00" (1/1) ... [2023-04-01 07:32:00,684 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:32:00" (1/1) ... [2023-04-01 07:32:00,686 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:32:00" (1/1) ... [2023-04-01 07:32:00,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:32:00" (1/1) ... [2023-04-01 07:32:00,701 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 07:32:00,701 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 07:32:00,701 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 07:32:00,701 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 07:32:00,702 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:32:00" (1/1) ... [2023-04-01 07:32:00,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 07:32:00,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 07:32:00,724 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) [2023-04-01 07:32:00,730 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 [2023-04-01 07:32:00,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 07:32:00,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 07:32:00,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2023-04-01 07:32:00,751 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2023-04-01 07:32:00,752 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 07:32:00,752 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-04-01 07:32:00,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2023-04-01 07:32:00,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2023-04-01 07:32:00,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2023-04-01 07:32:00,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2023-04-01 07:32:00,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2023-04-01 07:32:00,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ulong [2023-04-01 07:32:00,752 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2023-04-01 07:32:00,752 INFO L138 BoogieDeclarations]: Found implementation of procedure lock_sock [2023-04-01 07:32:00,752 INFO L138 BoogieDeclarations]: Found implementation of procedure pppox_sk [2023-04-01 07:32:00,752 INFO L138 BoogieDeclarations]: Found implementation of procedure register_pppox_proto [2023-04-01 07:32:00,752 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_pppox_proto [2023-04-01 07:32:00,752 INFO L138 BoogieDeclarations]: Found implementation of procedure pppox_unbind_sock [2023-04-01 07:32:00,752 INFO L138 BoogieDeclarations]: Found implementation of procedure pppox_ioctl [2023-04-01 07:32:00,753 INFO L138 BoogieDeclarations]: Found implementation of procedure pppox_create [2023-04-01 07:32:00,753 INFO L138 BoogieDeclarations]: Found implementation of procedure pppox_init [2023-04-01 07:32:00,753 INFO L138 BoogieDeclarations]: Found implementation of procedure pppox_exit [2023-04-01 07:32:00,753 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 07:32:00,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_try_module_get_5 [2023-04-01 07:32:00,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put_6 [2023-04-01 07:32:00,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2023-04-01 07:32:00,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2023-04-01 07:32:00,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_err_ptr [2023-04-01 07:32:00,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_ptr_err [2023-04-01 07:32:00,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err_or_null [2023-04-01 07:32:00,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_get [2023-04-01 07:32:00,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_try_module_get [2023-04-01 07:32:00,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2023-04-01 07:32:00,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put_and_exit [2023-04-01 07:32:00,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_refcount [2023-04-01 07:32:00,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2023-04-01 07:32:00,753 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2023-04-01 07:32:00,754 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_module [2023-04-01 07:32:00,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2023-04-01 07:32:00,754 INFO L138 BoogieDeclarations]: Found implementation of procedure lock_sock_nested [2023-04-01 07:32:00,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_channel_index [2023-04-01 07:32:00,754 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_unregister_channel [2023-04-01 07:32:00,754 INFO L138 BoogieDeclarations]: Found implementation of procedure release_sock [2023-04-01 07:32:00,754 INFO L138 BoogieDeclarations]: Found implementation of procedure sock_register [2023-04-01 07:32:00,755 INFO L138 BoogieDeclarations]: Found implementation of procedure sock_unregister [2023-04-01 07:32:00,755 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2023-04-01 07:32:00,755 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2023-04-01 07:32:00,755 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2023-04-01 07:32:00,755 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 07:32:00,756 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 07:32:00,756 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 07:32:00,756 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 07:32:00,756 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 07:32:00,756 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 07:32:00,756 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2023-04-01 07:32:00,756 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2023-04-01 07:32:00,757 INFO L130 BoogieDeclarations]: Found specification of procedure __request_module [2023-04-01 07:32:00,757 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_try_module_get_5 [2023-04-01 07:32:00,757 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put_6 [2023-04-01 07:32:00,757 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_try_module_get [2023-04-01 07:32:00,757 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2023-04-01 07:32:00,757 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 07:32:00,758 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-04-01 07:32:00,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 07:32:00,758 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2023-04-01 07:32:00,758 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-04-01 07:32:00,758 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2023-04-01 07:32:00,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 07:32:00,758 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2023-04-01 07:32:00,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2023-04-01 07:32:00,758 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2023-04-01 07:32:00,758 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2023-04-01 07:32:00,758 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2023-04-01 07:32:00,758 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2023-04-01 07:32:00,758 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ulong [2023-04-01 07:32:00,758 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2023-04-01 07:32:00,759 INFO L130 BoogieDeclarations]: Found specification of procedure sock_register [2023-04-01 07:32:00,759 INFO L130 BoogieDeclarations]: Found specification of procedure sock_unregister [2023-04-01 07:32:00,759 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_unregister_channel [2023-04-01 07:32:00,759 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_channel_index [2023-04-01 07:32:00,759 INFO L130 BoogieDeclarations]: Found specification of procedure lock_sock_nested [2023-04-01 07:32:00,759 INFO L130 BoogieDeclarations]: Found specification of procedure lock_sock [2023-04-01 07:32:00,759 INFO L130 BoogieDeclarations]: Found specification of procedure release_sock [2023-04-01 07:32:00,760 INFO L130 BoogieDeclarations]: Found specification of procedure pppox_sk [2023-04-01 07:32:00,760 INFO L130 BoogieDeclarations]: Found specification of procedure register_pppox_proto [2023-04-01 07:32:00,760 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_pppox_proto [2023-04-01 07:32:00,760 INFO L130 BoogieDeclarations]: Found specification of procedure pppox_unbind_sock [2023-04-01 07:32:00,760 INFO L130 BoogieDeclarations]: Found specification of procedure pppox_ioctl [2023-04-01 07:32:00,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 07:32:00,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 07:32:00,760 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 07:32:00,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 07:32:00,761 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2023-04-01 07:32:00,761 INFO L130 BoogieDeclarations]: Found specification of procedure pppox_create [2023-04-01 07:32:00,761 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2023-04-01 07:32:00,761 INFO L130 BoogieDeclarations]: Found specification of procedure pppox_init [2023-04-01 07:32:00,761 INFO L130 BoogieDeclarations]: Found specification of procedure pppox_exit [2023-04-01 07:32:00,761 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2023-04-01 07:32:00,761 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2023-04-01 07:32:00,761 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 07:32:00,761 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 07:32:00,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 07:32:00,761 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2023-04-01 07:32:00,761 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2023-04-01 07:32:00,761 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_err_ptr [2023-04-01 07:32:00,761 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_ptr_err [2023-04-01 07:32:00,761 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err_or_null [2023-04-01 07:32:00,762 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_get [2023-04-01 07:32:00,762 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put_and_exit [2023-04-01 07:32:00,762 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_refcount [2023-04-01 07:32:00,762 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 07:32:00,762 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2023-04-01 07:32:00,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 07:32:00,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 07:32:00,762 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-04-01 07:32:00,762 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 07:32:01,037 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 07:32:01,039 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 07:32:01,303 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2023-04-01 07:32:01,311 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_module_put_and_exitFINAL: assume true; [2023-04-01 07:32:01,474 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 07:32:01,599 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 07:32:01,601 INFO L302 CfgBuilder]: Removed 0 assume(true) statements. [2023-04-01 07:32:01,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 07:32:01 BoogieIcfgContainer [2023-04-01 07:32:01,609 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 07:32:01,611 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 07:32:01,611 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 07:32:01,613 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 07:32:01,613 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 07:31:59" (1/3) ... [2023-04-01 07:32:01,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a72474 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 07:32:01, skipping insertion in model container [2023-04-01 07:32:01,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 07:32:00" (2/3) ... [2023-04-01 07:32:01,614 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a72474 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 07:32:01, skipping insertion in model container [2023-04-01 07:32:01,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 07:32:01" (3/3) ... [2023-04-01 07:32:01,616 INFO L112 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--net--ppp--pppox.ko-entry_point.cil.out.i [2023-04-01 07:32:01,629 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 07:32:01,629 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 07:32:01,672 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 07:32:01,677 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=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2141a36a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 07:32:01,677 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 07:32:01,680 INFO L276 IsEmpty]: Start isEmpty. Operand has 136 states, 81 states have (on average 1.2962962962962963) internal successors, (105), 87 states have internal predecessors, (105), 29 states have call successors, (29), 23 states have call predecessors, (29), 22 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2023-04-01 07:32:01,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-04-01 07:32:01,687 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 07:32:01,688 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 07:32:01,688 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 07:32:01,692 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 07:32:01,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1775590972, now seen corresponding path program 1 times [2023-04-01 07:32:01,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 07:32:01,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112269872] [2023-04-01 07:32:01,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 07:32:01,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 07:32:01,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 07:32:02,209 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-04-01 07:32:02,210 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 07:32:02,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112269872] [2023-04-01 07:32:02,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112269872] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 07:32:02,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 07:32:02,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 07:32:02,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832711411] [2023-04-01 07:32:02,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 07:32:02,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 07:32:02,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 07:32:02,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 07:32:02,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 07:32:02,248 INFO L87 Difference]: Start difference. First operand has 136 states, 81 states have (on average 1.2962962962962963) internal successors, (105), 87 states have internal predecessors, (105), 29 states have call successors, (29), 23 states have call predecessors, (29), 22 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-04-01 07:32:02,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 07:32:02,363 INFO L93 Difference]: Finished difference Result 288 states and 364 transitions. [2023-04-01 07:32:02,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 07:32:02,365 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 67 [2023-04-01 07:32:02,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 07:32:02,371 INFO L225 Difference]: With dead ends: 288 [2023-04-01 07:32:02,371 INFO L226 Difference]: Without dead ends: 180 [2023-04-01 07:32:02,374 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 07:32:02,376 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 86 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 07:32:02,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 246 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 07:32:02,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2023-04-01 07:32:02,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 177. [2023-04-01 07:32:02,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 116 states have (on average 1.2844827586206897) internal successors, (149), 117 states have internal predecessors, (149), 33 states have call successors, (33), 30 states have call predecessors, (33), 27 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2023-04-01 07:32:02,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 211 transitions. [2023-04-01 07:32:02,432 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 211 transitions. Word has length 67 [2023-04-01 07:32:02,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 07:32:02,433 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 211 transitions. [2023-04-01 07:32:02,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 2 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-04-01 07:32:02,433 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 211 transitions. [2023-04-01 07:32:02,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-04-01 07:32:02,437 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 07:32:02,437 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 07:32:02,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 07:32:02,438 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 07:32:02,439 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 07:32:02,439 INFO L85 PathProgramCache]: Analyzing trace with hash -128197631, now seen corresponding path program 1 times [2023-04-01 07:32:02,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 07:32:02,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113274475] [2023-04-01 07:32:02,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 07:32:02,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 07:32:02,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 07:32:02,654 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-04-01 07:32:02,654 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 07:32:02,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113274475] [2023-04-01 07:32:02,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113274475] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 07:32:02,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 07:32:02,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 07:32:02,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837057992] [2023-04-01 07:32:02,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 07:32:02,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 07:32:02,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 07:32:02,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 07:32:02,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 07:32:02,657 INFO L87 Difference]: Start difference. First operand 177 states and 211 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-04-01 07:32:02,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 07:32:02,728 INFO L93 Difference]: Finished difference Result 462 states and 570 transitions. [2023-04-01 07:32:02,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 07:32:02,729 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 70 [2023-04-01 07:32:02,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 07:32:02,733 INFO L225 Difference]: With dead ends: 462 [2023-04-01 07:32:02,733 INFO L226 Difference]: Without dead ends: 309 [2023-04-01 07:32:02,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 07:32:02,737 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 106 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 07:32:02,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 204 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 07:32:02,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2023-04-01 07:32:02,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 297. [2023-04-01 07:32:02,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 204 states have (on average 1.2990196078431373) internal successors, (265), 205 states have internal predecessors, (265), 49 states have call successors, (49), 46 states have call predecessors, (49), 43 states have return successors, (51), 45 states have call predecessors, (51), 45 states have call successors, (51) [2023-04-01 07:32:02,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 365 transitions. [2023-04-01 07:32:02,768 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 365 transitions. Word has length 70 [2023-04-01 07:32:02,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 07:32:02,769 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 365 transitions. [2023-04-01 07:32:02,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 3 states have call successors, (14), 3 states have call predecessors, (14), 2 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2023-04-01 07:32:02,769 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 365 transitions. [2023-04-01 07:32:02,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-04-01 07:32:02,774 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 07:32:02,774 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 07:32:02,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 07:32:02,774 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 07:32:02,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 07:32:02,774 INFO L85 PathProgramCache]: Analyzing trace with hash -448895882, now seen corresponding path program 1 times [2023-04-01 07:32:02,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 07:32:02,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006523389] [2023-04-01 07:32:02,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 07:32:02,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 07:32:02,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 07:32:02,896 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-04-01 07:32:02,896 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 07:32:02,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006523389] [2023-04-01 07:32:02,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006523389] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 07:32:02,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 07:32:02,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-04-01 07:32:02,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881159762] [2023-04-01 07:32:02,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 07:32:02,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-04-01 07:32:02,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 07:32:02,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-04-01 07:32:02,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 07:32:02,902 INFO L87 Difference]: Start difference. First operand 297 states and 365 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-04-01 07:32:02,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 07:32:02,945 INFO L93 Difference]: Finished difference Result 512 states and 634 transitions. [2023-04-01 07:32:02,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-04-01 07:32:02,945 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) Word has length 84 [2023-04-01 07:32:02,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 07:32:02,950 INFO L225 Difference]: With dead ends: 512 [2023-04-01 07:32:02,950 INFO L226 Difference]: Without dead ends: 248 [2023-04-01 07:32:02,951 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-04-01 07:32:02,953 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 69 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 07:32:02,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 216 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 07:32:02,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2023-04-01 07:32:02,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 220. [2023-04-01 07:32:02,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 157 states have (on average 1.3248407643312101) internal successors, (208), 158 states have internal predecessors, (208), 34 states have call successors, (34), 31 states have call predecessors, (34), 28 states have return successors, (33), 30 states have call predecessors, (33), 30 states have call successors, (33) [2023-04-01 07:32:02,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 275 transitions. [2023-04-01 07:32:02,976 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 275 transitions. Word has length 84 [2023-04-01 07:32:02,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 07:32:02,978 INFO L495 AbstractCegarLoop]: Abstraction has 220 states and 275 transitions. [2023-04-01 07:32:02,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 2 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (12), 2 states have call predecessors, (12), 2 states have call successors, (12) [2023-04-01 07:32:02,978 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 275 transitions. [2023-04-01 07:32:02,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-04-01 07:32:02,980 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 07:32:02,980 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 07:32:02,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-04-01 07:32:02,980 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 07:32:02,980 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 07:32:02,980 INFO L85 PathProgramCache]: Analyzing trace with hash -468614782, now seen corresponding path program 1 times [2023-04-01 07:32:02,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 07:32:02,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152011990] [2023-04-01 07:32:02,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 07:32:02,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 07:32:03,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 07:32:03,251 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-04-01 07:32:03,252 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 07:32:03,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152011990] [2023-04-01 07:32:03,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152011990] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 07:32:03,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539554279] [2023-04-01 07:32:03,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 07:32:03,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 07:32:03,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 07:32:03,256 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) [2023-04-01 07:32:03,257 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 07:32:03,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 07:32:03,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 9 conjunts are in the unsatisfiable core [2023-04-01 07:32:03,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 07:32:03,560 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 07:32:03,560 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-04-01 07:32:03,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539554279] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 07:32:03,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-04-01 07:32:03,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 8 [2023-04-01 07:32:03,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377802433] [2023-04-01 07:32:03,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 07:32:03,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-04-01 07:32:03,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 07:32:03,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-04-01 07:32:03,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-04-01 07:32:03,562 INFO L87 Difference]: Start difference. First operand 220 states and 275 transitions. Second operand has 6 states, 4 states have (on average 13.75) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-04-01 07:32:03,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 07:32:03,667 INFO L93 Difference]: Finished difference Result 421 states and 531 transitions. [2023-04-01 07:32:03,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-04-01 07:32:03,667 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 13.75) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 100 [2023-04-01 07:32:03,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 07:32:03,669 INFO L225 Difference]: With dead ends: 421 [2023-04-01 07:32:03,669 INFO L226 Difference]: Without dead ends: 221 [2023-04-01 07:32:03,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-04-01 07:32:03,672 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 3 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 564 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 07:32:03,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 564 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 07:32:03,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2023-04-01 07:32:03,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2023-04-01 07:32:03,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 158 states have (on average 1.3227848101265822) internal successors, (209), 159 states have internal predecessors, (209), 34 states have call successors, (34), 31 states have call predecessors, (34), 28 states have return successors, (33), 30 states have call predecessors, (33), 30 states have call successors, (33) [2023-04-01 07:32:03,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 276 transitions. [2023-04-01 07:32:03,682 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 276 transitions. Word has length 100 [2023-04-01 07:32:03,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 07:32:03,682 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 276 transitions. [2023-04-01 07:32:03,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 13.75) internal successors, (55), 6 states have internal predecessors, (55), 3 states have call successors, (20), 2 states have call predecessors, (20), 4 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2023-04-01 07:32:03,682 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 276 transitions. [2023-04-01 07:32:03,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2023-04-01 07:32:03,686 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 07:32:03,686 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 07:32:03,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 07:32:03,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 07:32:03,893 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 07:32:03,894 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 07:32:03,894 INFO L85 PathProgramCache]: Analyzing trace with hash -895594448, now seen corresponding path program 1 times [2023-04-01 07:32:03,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 07:32:03,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876269867] [2023-04-01 07:32:03,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 07:32:03,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 07:32:03,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 07:32:04,119 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 07:32:04,119 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 07:32:04,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876269867] [2023-04-01 07:32:04,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876269867] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 07:32:04,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752487072] [2023-04-01 07:32:04,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 07:32:04,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 07:32:04,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 07:32:04,121 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 07:32:04,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 07:32:04,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 07:32:04,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 1011 conjuncts, 25 conjunts are in the unsatisfiable core [2023-04-01 07:32:04,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 07:32:04,453 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-04-01 07:32:04,453 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 07:32:04,625 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 07:32:04,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752487072] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 07:32:04,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 07:32:04,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 9] total 17 [2023-04-01 07:32:04,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593211169] [2023-04-01 07:32:04,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 07:32:04,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 07:32:04,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 07:32:04,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 07:32:04,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2023-04-01 07:32:04,628 INFO L87 Difference]: Start difference. First operand 221 states and 276 transitions. Second operand has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2023-04-01 07:32:04,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 07:32:04,697 INFO L93 Difference]: Finished difference Result 390 states and 496 transitions. [2023-04-01 07:32:04,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 07:32:04,698 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) Word has length 102 [2023-04-01 07:32:04,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 07:32:04,701 INFO L225 Difference]: With dead ends: 390 [2023-04-01 07:32:04,701 INFO L226 Difference]: Without dead ends: 216 [2023-04-01 07:32:04,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2023-04-01 07:32:04,702 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 2 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 07:32:04,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 709 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 07:32:04,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2023-04-01 07:32:04,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 212. [2023-04-01 07:32:04,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 153 states have (on average 1.3202614379084967) internal successors, (202), 154 states have internal predecessors, (202), 31 states have call successors, (31), 28 states have call predecessors, (31), 27 states have return successors, (32), 29 states have call predecessors, (32), 27 states have call successors, (32) [2023-04-01 07:32:04,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 265 transitions. [2023-04-01 07:32:04,713 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 265 transitions. Word has length 102 [2023-04-01 07:32:04,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 07:32:04,714 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 265 transitions. [2023-04-01 07:32:04,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 2 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (14), 4 states have call predecessors, (14), 2 states have call successors, (14) [2023-04-01 07:32:04,714 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 265 transitions. [2023-04-01 07:32:04,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-04-01 07:32:04,715 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 07:32:04,716 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 07:32:04,722 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-04-01 07:32:04,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 07:32:04,922 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 07:32:04,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 07:32:04,923 INFO L85 PathProgramCache]: Analyzing trace with hash -22210017, now seen corresponding path program 1 times [2023-04-01 07:32:04,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 07:32:04,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417736915] [2023-04-01 07:32:04,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 07:32:04,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 07:32:04,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 07:32:05,260 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-04-01 07:32:05,261 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 07:32:05,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417736915] [2023-04-01 07:32:05,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417736915] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 07:32:05,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842860452] [2023-04-01 07:32:05,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 07:32:05,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 07:32:05,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 07:32:05,262 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 07:32:05,275 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 07:32:05,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 07:32:05,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 1022 conjuncts, 38 conjunts are in the unsatisfiable core [2023-04-01 07:32:05,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 07:32:05,832 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-04-01 07:32:05,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 07:32:06,322 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-04-01 07:32:06,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842860452] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 07:32:06,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 07:32:06,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [7, 12] total 25 [2023-04-01 07:32:06,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115179924] [2023-04-01 07:32:06,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 07:32:06,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 07:32:06,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 07:32:06,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 07:32:06,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2023-04-01 07:32:06,324 INFO L87 Difference]: Start difference. First operand 212 states and 265 transitions. Second operand has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 5 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2023-04-01 07:32:06,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 07:32:06,636 INFO L93 Difference]: Finished difference Result 305 states and 384 transitions. [2023-04-01 07:32:06,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 07:32:06,636 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 5 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) Word has length 106 [2023-04-01 07:32:06,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 07:32:06,637 INFO L225 Difference]: With dead ends: 305 [2023-04-01 07:32:06,637 INFO L226 Difference]: Without dead ends: 302 [2023-04-01 07:32:06,638 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 188 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=739, Unknown=0, NotChecked=0, Total=870 [2023-04-01 07:32:06,638 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 433 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 07:32:06,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 463 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 07:32:06,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2023-04-01 07:32:06,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 291. [2023-04-01 07:32:06,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 214 states have (on average 1.3317757009345794) internal successors, (285), 215 states have internal predecessors, (285), 37 states have call successors, (37), 35 states have call predecessors, (37), 39 states have return successors, (48), 40 states have call predecessors, (48), 34 states have call successors, (48) [2023-04-01 07:32:06,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 370 transitions. [2023-04-01 07:32:06,648 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 370 transitions. Word has length 106 [2023-04-01 07:32:06,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 07:32:06,648 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 370 transitions. [2023-04-01 07:32:06,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 5 states have call successors, (20), 5 states have call predecessors, (20), 4 states have return successors, (15), 6 states have call predecessors, (15), 4 states have call successors, (15) [2023-04-01 07:32:06,648 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 370 transitions. [2023-04-01 07:32:06,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2023-04-01 07:32:06,649 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 07:32:06,649 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 07:32:06,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 07:32:06,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 07:32:06,856 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 07:32:06,857 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 07:32:06,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1066981840, now seen corresponding path program 1 times [2023-04-01 07:32:06,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 07:32:06,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887486016] [2023-04-01 07:32:06,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 07:32:06,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 07:32:06,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 07:32:07,349 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2023-04-01 07:32:07,350 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 07:32:07,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887486016] [2023-04-01 07:32:07,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887486016] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 07:32:07,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969210952] [2023-04-01 07:32:07,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 07:32:07,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 07:32:07,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 07:32:07,351 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 07:32:07,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 07:32:07,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 07:32:07,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 990 conjuncts, 36 conjunts are in the unsatisfiable core [2023-04-01 07:32:07,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 07:32:07,793 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 07:32:07,793 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 07:32:08,453 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-04-01 07:32:08,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969210952] provided 1 perfect and 1 imperfect interpolant sequences [2023-04-01 07:32:08,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-04-01 07:32:08,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [10, 10] total 24 [2023-04-01 07:32:08,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315439086] [2023-04-01 07:32:08,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 07:32:08,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 07:32:08,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 07:32:08,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 07:32:08,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2023-04-01 07:32:08,455 INFO L87 Difference]: Start difference. First operand 291 states and 370 transitions. Second operand has 11 states, 10 states have (on average 5.7) internal successors, (57), 9 states have internal predecessors, (57), 4 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (17), 5 states have call predecessors, (17), 3 states have call successors, (17) [2023-04-01 07:32:08,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 07:32:08,680 INFO L93 Difference]: Finished difference Result 416 states and 546 transitions. [2023-04-01 07:32:08,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 07:32:08,681 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 5.7) internal successors, (57), 9 states have internal predecessors, (57), 4 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (17), 5 states have call predecessors, (17), 3 states have call successors, (17) Word has length 114 [2023-04-01 07:32:08,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 07:32:08,682 INFO L225 Difference]: With dead ends: 416 [2023-04-01 07:32:08,682 INFO L226 Difference]: Without dead ends: 404 [2023-04-01 07:32:08,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 221 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2023-04-01 07:32:08,683 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 282 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 522 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 07:32:08,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 522 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 07:32:08,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2023-04-01 07:32:08,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 295. [2023-04-01 07:32:08,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 216 states have (on average 1.3287037037037037) internal successors, (287), 219 states have internal predecessors, (287), 37 states have call successors, (37), 35 states have call predecessors, (37), 41 states have return successors, (50), 40 states have call predecessors, (50), 34 states have call successors, (50) [2023-04-01 07:32:08,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 374 transitions. [2023-04-01 07:32:08,702 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 374 transitions. Word has length 114 [2023-04-01 07:32:08,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 07:32:08,703 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 374 transitions. [2023-04-01 07:32:08,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 5.7) internal successors, (57), 9 states have internal predecessors, (57), 4 states have call successors, (20), 4 states have call predecessors, (20), 5 states have return successors, (17), 5 states have call predecessors, (17), 3 states have call successors, (17) [2023-04-01 07:32:08,703 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 374 transitions. [2023-04-01 07:32:08,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-04-01 07:32:08,704 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 07:32:08,704 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 07:32:08,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 07:32:08,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 07:32:08,911 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 07:32:08,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 07:32:08,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1407501620, now seen corresponding path program 1 times [2023-04-01 07:32:08,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 07:32:08,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115726010] [2023-04-01 07:32:08,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 07:32:08,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 07:32:08,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 07:32:09,168 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 07:32:09,168 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 07:32:09,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115726010] [2023-04-01 07:32:09,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115726010] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 07:32:09,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899924260] [2023-04-01 07:32:09,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 07:32:09,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 07:32:09,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 07:32:09,169 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 07:32:09,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 07:32:09,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 07:32:09,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 1070 conjuncts, 18 conjunts are in the unsatisfiable core [2023-04-01 07:32:09,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 07:32:09,499 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 07:32:09,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 07:32:09,708 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-04-01 07:32:09,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1899924260] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 07:32:09,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [15232076] [2023-04-01 07:32:09,726 INFO L159 IcfgInterpreter]: Started Sifa with 103 locations of interest [2023-04-01 07:32:09,726 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 07:32:09,729 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 07:32:09,732 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 07:32:09,732 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 07:32:10,767 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 97 for LOIs [2023-04-01 07:32:11,220 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 92 for LOIs [2023-04-01 07:32:42,210 INFO L197 IcfgInterpreter]: Interpreting procedure pppox_init with input of size 68 for LOIs [2023-04-01 07:32:42,290 INFO L197 IcfgInterpreter]: Interpreting procedure sock_register with input of size 72 for LOIs [2023-04-01 07:32:42,299 INFO L197 IcfgInterpreter]: Interpreting procedure pppox_exit with input of size 70 for LOIs [2023-04-01 07:32:42,342 INFO L197 IcfgInterpreter]: Interpreting procedure sock_unregister with input of size 73 for LOIs [2023-04-01 07:32:42,362 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_memset with input of size 78 for LOIs [2023-04-01 07:32:42,590 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_initialize with input of size 67 for LOIs [2023-04-01 07:32:42,596 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_init_zalloc with input of size 74 for LOIs [2023-04-01 07:32:46,096 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.meminit with input of size 103 for LOIs [2023-04-01 07:32:46,124 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 82 for LOIs [2023-04-01 07:32:46,136 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_check_final_state with input of size 69 for LOIs [2023-04-01 07:32:46,147 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_error with input of size 72 for LOIs [2023-04-01 07:32:46,153 INFO L197 IcfgInterpreter]: Interpreting procedure pppox_create with input of size 111 for LOIs [2023-04-01 07:32:46,690 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_module_put_6 with input of size 91 for LOIs [2023-04-01 07:32:46,761 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_module_put with input of size 91 for LOIs [2023-04-01 07:32:46,788 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_try_module_get_5 with input of size 105 for LOIs [2023-04-01 07:32:46,881 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_try_module_get with input of size 105 for LOIs [2023-04-01 07:32:46,980 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_undef_int with input of size 102 for LOIs [2023-04-01 07:32:46,989 INFO L197 IcfgInterpreter]: Interpreting procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int with input of size 103 for LOIs [2023-04-01 07:32:47,003 INFO L197 IcfgInterpreter]: Interpreting procedure #Ultimate.C_memset with input of size 87 for LOIs [2023-04-01 07:32:48,808 INFO L180 IcfgInterpreter]: Interpretation finished