/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/list-simple/dll2n_append_unequal.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:54:07,068 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:54:07,070 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:54:07,097 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:54:07,098 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:54:07,099 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:54:07,100 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:54:07,101 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:54:07,102 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:54:07,103 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:54:07,104 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:54:07,104 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:54:07,105 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:54:07,105 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:54:07,106 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:54:07,107 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:54:07,108 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:54:07,108 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:54:07,109 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:54:07,111 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:54:07,112 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:54:07,113 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:54:07,113 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:54:07,114 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:54:07,117 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:54:07,117 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:54:07,117 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:54:07,118 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:54:07,118 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:54:07,119 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:54:07,119 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:54:07,120 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:54:07,120 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:54:07,121 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:54:07,121 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:54:07,122 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:54:07,122 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:54:07,122 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:54:07,123 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:54:07,123 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:54:07,124 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:54:07,126 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 04:54:07,157 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:54:07,157 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:54:07,158 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:54:07,158 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:54:07,158 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:54:07,158 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:54:07,159 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:54:07,159 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:54:07,159 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:54:07,159 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:54:07,159 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:54:07,159 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:54:07,159 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:54:07,159 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:54:07,160 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:54:07,160 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:54:07,160 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:54:07,160 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:54:07,160 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:54:07,161 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:54:07,161 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:54:07,161 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:54:07,161 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:54:07,161 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:54:07,161 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:54:07,161 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:54:07,161 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:54:07,161 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:54:07,162 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:54:07,162 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:54:07,162 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:54:07,162 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:54:07,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:54:07,162 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:54:07,162 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:54:07,162 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:54:07,163 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:54:07,163 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:54:07,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:54:07,163 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:54:07,163 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:54:07,163 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:54:07,403 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:54:07,432 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:54:07,435 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:54:07,436 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:54:07,437 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:54:07,438 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2n_append_unequal.i [2023-04-01 04:54:08,657 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:54:08,915 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:54:08,916 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2n_append_unequal.i [2023-04-01 04:54:08,932 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10d562a3c/89b2d25915f643588ba5d19e0d1ae9ea/FLAGa9943e031 [2023-04-01 04:54:08,946 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/10d562a3c/89b2d25915f643588ba5d19e0d1ae9ea [2023-04-01 04:54:08,949 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:54:08,950 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:54:08,951 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:54:08,951 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:54:08,954 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:54:08,955 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:54:08" (1/1) ... [2023-04-01 04:54:08,956 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c5fa6e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:54:08, skipping insertion in model container [2023-04-01 04:54:08,957 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:54:08" (1/1) ... [2023-04-01 04:54:08,963 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:54:08,998 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:54:09,199 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/list-simple/dll2n_append_unequal.i[24457,24470] [2023-04-01 04:54:09,203 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:54:09,211 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:54:09,273 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/list-simple/dll2n_append_unequal.i[24457,24470] [2023-04-01 04:54:09,274 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:54:09,310 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:54:09,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:54:09 WrapperNode [2023-04-01 04:54:09,311 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:54:09,312 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:54:09,312 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:54:09,312 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:54:09,322 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:54:09" (1/1) ... [2023-04-01 04:54:09,322 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:54:09" (1/1) ... [2023-04-01 04:54:09,335 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:54:09" (1/1) ... [2023-04-01 04:54:09,335 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:54:09" (1/1) ... [2023-04-01 04:54:09,352 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:54:09" (1/1) ... [2023-04-01 04:54:09,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:54:09" (1/1) ... [2023-04-01 04:54:09,366 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:54:09" (1/1) ... [2023-04-01 04:54:09,368 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:54:09" (1/1) ... [2023-04-01 04:54:09,376 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:54:09,377 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:54:09,377 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:54:09,377 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:54:09,378 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:54:09" (1/1) ... [2023-04-01 04:54:09,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:54:09,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:54:09,418 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 04:54:09,431 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 04:54:09,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:54:09,457 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:54:09,457 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:54:09,457 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2023-04-01 04:54:09,459 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2023-04-01 04:54:09,459 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-04-01 04:54:09,459 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-04-01 04:54:09,459 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2023-04-01 04:54:09,459 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy [2023-04-01 04:54:09,460 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_append [2023-04-01 04:54:09,460 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:54:09,460 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:54:09,460 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:54:09,460 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 04:54:09,460 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 04:54:09,460 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:54:09,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:54:09,460 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2023-04-01 04:54:09,461 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2023-04-01 04:54:09,461 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-04-01 04:54:09,461 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-04-01 04:54:09,461 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-04-01 04:54:09,461 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-04-01 04:54:09,461 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-04-01 04:54:09,461 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-04-01 04:54:09,461 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-04-01 04:54:09,461 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-04-01 04:54:09,461 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-04-01 04:54:09,462 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-04-01 04:54:09,462 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-04-01 04:54:09,462 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-04-01 04:54:09,462 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-04-01 04:54:09,462 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-04-01 04:54:09,462 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-04-01 04:54:09,462 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-04-01 04:54:09,462 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-04-01 04:54:09,462 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-04-01 04:54:09,463 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-04-01 04:54:09,463 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-04-01 04:54:09,463 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-04-01 04:54:09,463 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-04-01 04:54:09,463 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-04-01 04:54:09,463 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-04-01 04:54:09,463 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-04-01 04:54:09,463 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-04-01 04:54:09,464 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-04-01 04:54:09,464 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-04-01 04:54:09,464 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-04-01 04:54:09,465 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-04-01 04:54:09,465 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-04-01 04:54:09,465 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-04-01 04:54:09,465 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-04-01 04:54:09,465 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-04-01 04:54:09,465 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-04-01 04:54:09,466 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-04-01 04:54:09,466 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-04-01 04:54:09,466 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-04-01 04:54:09,466 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-04-01 04:54:09,467 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-04-01 04:54:09,467 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-04-01 04:54:09,468 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-04-01 04:54:09,468 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-04-01 04:54:09,468 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-04-01 04:54:09,468 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-04-01 04:54:09,468 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-04-01 04:54:09,468 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-04-01 04:54:09,468 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-04-01 04:54:09,468 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-04-01 04:54:09,468 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-04-01 04:54:09,468 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 04:54:09,469 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-04-01 04:54:09,469 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-04-01 04:54:09,469 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 04:54:09,469 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-04-01 04:54:09,469 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-04-01 04:54:09,469 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-04-01 04:54:09,469 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-04-01 04:54:09,469 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2023-04-01 04:54:09,469 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-04-01 04:54:09,470 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2023-04-01 04:54:09,470 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-04-01 04:54:09,470 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:54:09,470 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2023-04-01 04:54:09,471 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-04-01 04:54:09,471 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-04-01 04:54:09,471 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-04-01 04:54:09,471 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-04-01 04:54:09,471 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-04-01 04:54:09,471 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-04-01 04:54:09,471 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-04-01 04:54:09,471 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-04-01 04:54:09,471 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-04-01 04:54:09,472 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-04-01 04:54:09,472 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-04-01 04:54:09,472 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-04-01 04:54:09,472 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-04-01 04:54:09,472 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-04-01 04:54:09,472 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-04-01 04:54:09,472 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-04-01 04:54:09,472 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-04-01 04:54:09,472 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-04-01 04:54:09,472 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-04-01 04:54:09,473 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-04-01 04:54:09,473 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-04-01 04:54:09,473 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-04-01 04:54:09,473 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-04-01 04:54:09,473 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-04-01 04:54:09,473 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-04-01 04:54:09,473 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-04-01 04:54:09,474 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-04-01 04:54:09,474 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-04-01 04:54:09,474 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-04-01 04:54:09,474 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-04-01 04:54:09,474 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-04-01 04:54:09,474 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-04-01 04:54:09,474 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-04-01 04:54:09,474 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-04-01 04:54:09,474 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-04-01 04:54:09,475 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-04-01 04:54:09,475 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-04-01 04:54:09,476 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-04-01 04:54:09,476 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-04-01 04:54:09,478 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-04-01 04:54:09,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 04:54:09,483 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 04:54:09,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:54:09,484 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2023-04-01 04:54:09,484 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy [2023-04-01 04:54:09,484 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 04:54:09,484 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:54:09,484 INFO L130 BoogieDeclarations]: Found specification of procedure dll_append [2023-04-01 04:54:09,484 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:54:09,484 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 04:54:09,484 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-04-01 04:54:09,484 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:54:09,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:54:09,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:54:09,485 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:54:09,786 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:54:09,788 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:54:09,875 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-04-01 04:54:10,039 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:54:10,082 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:54:10,082 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-04-01 04:54:10,084 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:54:10 BoogieIcfgContainer [2023-04-01 04:54:10,084 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:54:10,086 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:54:10,087 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:54:10,089 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:54:10,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:54:08" (1/3) ... [2023-04-01 04:54:10,090 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10b73678 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:54:10, skipping insertion in model container [2023-04-01 04:54:10,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:54:09" (2/3) ... [2023-04-01 04:54:10,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10b73678 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:54:10, skipping insertion in model container [2023-04-01 04:54:10,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:54:10" (3/3) ... [2023-04-01 04:54:10,092 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2n_append_unequal.i [2023-04-01 04:54:10,106 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:54:10,106 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:54:10,144 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:54:10,150 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;@9976517, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:54:10,150 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:54:10,154 INFO L276 IsEmpty]: Start isEmpty. Operand has 48 states, 32 states have (on average 1.40625) internal successors, (45), 33 states have internal predecessors, (45), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-04-01 04:54:10,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-04-01 04:54:10,160 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:54:10,160 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:54:10,161 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:54:10,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:54:10,165 INFO L85 PathProgramCache]: Analyzing trace with hash -950459372, now seen corresponding path program 1 times [2023-04-01 04:54:10,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:54:10,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898170517] [2023-04-01 04:54:10,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:54:10,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:54:10,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:54:10,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:54:10,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:54:10,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898170517] [2023-04-01 04:54:10,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898170517] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:54:10,544 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:54:10,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:54:10,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672126750] [2023-04-01 04:54:10,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:54:10,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:54:10,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:54:10,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:54:10,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:54:10,578 INFO L87 Difference]: Start difference. First operand has 48 states, 32 states have (on average 1.40625) internal successors, (45), 33 states have internal predecessors, (45), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 5 states, 3 states have (on average 5.333333333333333) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 04:54:10,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:54:10,658 INFO L93 Difference]: Finished difference Result 89 states and 114 transitions. [2023-04-01 04:54:10,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 04:54:10,661 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 5.333333333333333) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2023-04-01 04:54:10,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:54:10,666 INFO L225 Difference]: With dead ends: 89 [2023-04-01 04:54:10,666 INFO L226 Difference]: Without dead ends: 39 [2023-04-01 04:54:10,669 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 04:54:10,672 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 19 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 04:54:10,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 171 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 04:54:10,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-04-01 04:54:10,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2023-04-01 04:54:10,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 04:54:10,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2023-04-01 04:54:10,710 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 25 [2023-04-01 04:54:10,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:54:10,710 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2023-04-01 04:54:10,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 5.333333333333333) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-01 04:54:10,711 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2023-04-01 04:54:10,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 04:54:10,712 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:54:10,713 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:54:10,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:54:10,713 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:54:10,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:54:10,714 INFO L85 PathProgramCache]: Analyzing trace with hash -613663315, now seen corresponding path program 1 times [2023-04-01 04:54:10,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:54:10,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365912868] [2023-04-01 04:54:10,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:54:10,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:54:10,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:54:10,991 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 04:54:10,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:54:10,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365912868] [2023-04-01 04:54:10,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365912868] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:54:10,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474785727] [2023-04-01 04:54:10,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:54:10,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:54:10,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:54:10,996 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 04:54:10,998 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 04:54:11,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:54:11,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 04:54:11,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:54:11,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:54:11,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:54:11,469 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 04:54:11,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474785727] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:54:11,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1031553113] [2023-04-01 04:54:11,499 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-04-01 04:54:11,500 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:54:11,502 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:54:11,507 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:54:11,508 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:54:11,583 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:54:12,154 INFO L197 IcfgInterpreter]: Interpreting procedure dll_append with input of size 36 for LOIs [2023-04-01 04:54:12,425 INFO L197 IcfgInterpreter]: Interpreting procedure dll_create with input of size 44 for LOIs [2023-04-01 04:54:12,788 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 15 for LOIs [2023-04-01 04:54:12,810 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:54:12,813 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:54:14,239 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '437#(and (= main_~data~0 1) (<= 1 |#StackHeapBarrier|) (= |main_~#s~0.offset| 0) (= main_~count~0 0) (= main_~ptr~0.base (select (select |#memory_$Pointer$.base| |main_~#s~0.base|) 0)) (= (select (select |#memory_$Pointer$.offset| main_~ptr~0.base) (+ main_~ptr~0.offset 4)) 0) (= main_~len~0 2) (= (select (select |#memory_$Pointer$.base| main_~ptr~0.base) (+ main_~ptr~0.offset 4)) 0) (= |#NULL.offset| 0) (= 5 main_~uneq~0) (= (select (select |#memory_$Pointer$.offset| |main_~#s~0.base|) 0) main_~ptr~0.offset) (<= (+ |#StackHeapBarrier| 1) |main_~#s~0.base|) (= |#NULL.base| 0))' at error location [2023-04-01 04:54:14,240 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:54:14,240 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:54:14,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-04-01 04:54:14,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131037129] [2023-04-01 04:54:14,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:54:14,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 04:54:14,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:54:14,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 04:54:14,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1052, Unknown=0, NotChecked=0, Total=1190 [2023-04-01 04:54:14,243 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 12 states, 8 states have (on average 4.25) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2023-04-01 04:54:14,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:54:14,332 INFO L93 Difference]: Finished difference Result 68 states and 83 transitions. [2023-04-01 04:54:14,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:54:14,333 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 4.25) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) Word has length 32 [2023-04-01 04:54:14,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:54:14,334 INFO L225 Difference]: With dead ends: 68 [2023-04-01 04:54:14,335 INFO L226 Difference]: Without dead ends: 42 [2023-04-01 04:54:14,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=154, Invalid=1178, Unknown=0, NotChecked=0, Total=1332 [2023-04-01 04:54:14,336 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 31 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:54:14,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 159 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:54:14,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-04-01 04:54:14,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2023-04-01 04:54:14,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 04:54:14,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2023-04-01 04:54:14,342 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 32 [2023-04-01 04:54:14,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:54:14,343 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2023-04-01 04:54:14,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 4.25) internal successors, (34), 12 states have internal predecessors, (34), 7 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2023-04-01 04:54:14,343 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2023-04-01 04:54:14,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-04-01 04:54:14,344 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:54:14,344 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-04-01 04:54:14,356 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 04:54:14,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:54:14,552 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:54:14,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:54:14,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1360079372, now seen corresponding path program 2 times [2023-04-01 04:54:14,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:54:14,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283740449] [2023-04-01 04:54:14,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:54:14,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:54:14,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:54:15,262 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 04:54:15,262 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:54:15,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283740449] [2023-04-01 04:54:15,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283740449] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:54:15,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972548831] [2023-04-01 04:54:15,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 04:54:15,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:54:15,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:54:15,264 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 04:54:15,267 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 04:54:15,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 04:54:15,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 04:54:15,464 INFO L262 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 36 conjunts are in the unsatisfiable core [2023-04-01 04:54:15,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:54:15,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2023-04-01 04:54:15,629 WARN L861 $PredicateComparison]: unable to prove that (exists ((node_create_~temp~0.base Int)) (and (<= (+ node_create_~temp~0.base 1) |c_#StackHeapBarrier|) (exists ((v_ArrVal_367 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| node_create_~temp~0.base v_ArrVal_367))))) is different from true [2023-04-01 04:54:17,796 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 1 not checked. [2023-04-01 04:54:17,796 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:54:17,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972548831] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:54:17,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [404921618] [2023-04-01 04:54:17,916 INFO L159 IcfgInterpreter]: Started Sifa with 28 locations of interest [2023-04-01 04:54:17,917 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:54:17,917 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:54:17,917 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:54:17,917 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:54:17,948 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:54:18,236 INFO L197 IcfgInterpreter]: Interpreting procedure dll_append with input of size 36 for LOIs [2023-04-01 04:54:18,395 INFO L197 IcfgInterpreter]: Interpreting procedure dll_create with input of size 44 for LOIs [2023-04-01 04:54:18,676 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 15 for LOIs [2023-04-01 04:54:18,692 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:54:18,695 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:54:20,490 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '771#(and (= main_~data~0 1) (<= 1 |#StackHeapBarrier|) (= |main_~#s~0.offset| 0) (= main_~count~0 0) (= main_~ptr~0.base (select (select |#memory_$Pointer$.base| |main_~#s~0.base|) 0)) (= (select (select |#memory_$Pointer$.offset| main_~ptr~0.base) (+ main_~ptr~0.offset 4)) 0) (= main_~len~0 2) (= (select (select |#memory_$Pointer$.base| main_~ptr~0.base) (+ main_~ptr~0.offset 4)) 0) (= |#NULL.offset| 0) (= 5 main_~uneq~0) (= (select (select |#memory_$Pointer$.offset| |main_~#s~0.base|) 0) main_~ptr~0.offset) (<= (+ |#StackHeapBarrier| 1) |main_~#s~0.base|) (= |#NULL.base| 0))' at error location [2023-04-01 04:54:20,491 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:54:20,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 04:54:20,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2023-04-01 04:54:20,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77686891] [2023-04-01 04:54:20,491 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 04:54:20,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-04-01 04:54:20,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:54:20,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-04-01 04:54:20,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=2057, Unknown=22, NotChecked=92, Total=2352 [2023-04-01 04:54:20,494 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 25 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 19 states have internal predecessors, (32), 7 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-04-01 04:54:22,923 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-04-01 04:54:23,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:54:23,945 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2023-04-01 04:54:23,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-04-01 04:54:23,946 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 19 states have internal predecessors, (32), 7 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 39 [2023-04-01 04:54:23,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:54:23,947 INFO L225 Difference]: With dead ends: 52 [2023-04-01 04:54:23,947 INFO L226 Difference]: Without dead ends: 40 [2023-04-01 04:54:23,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 758 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=218, Invalid=2732, Unknown=24, NotChecked=106, Total=3080 [2023-04-01 04:54:23,949 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 42 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 9 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:54:23,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 291 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 277 Invalid, 9 Unknown, 47 Unchecked, 3.3s Time] [2023-04-01 04:54:23,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-04-01 04:54:23,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-04-01 04:54:23,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 04:54:23,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2023-04-01 04:54:23,958 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 39 [2023-04-01 04:54:23,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:54:23,958 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2023-04-01 04:54:23,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 19 states have internal predecessors, (32), 7 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2023-04-01 04:54:23,959 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2023-04-01 04:54:23,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-04-01 04:54:23,960 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:54:23,960 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-04-01 04:54:23,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 04:54:24,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-04-01 04:54:24,173 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:54:24,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:54:24,174 INFO L85 PathProgramCache]: Analyzing trace with hash 272964696, now seen corresponding path program 1 times [2023-04-01 04:54:24,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:54:24,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670446510] [2023-04-01 04:54:24,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:54:24,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:54:24,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:54:26,091 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:54:26,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:54:26,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670446510] [2023-04-01 04:54:26,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670446510] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:54:26,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844276425] [2023-04-01 04:54:26,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:54:26,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:54:26,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:54:26,093 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 04:54:26,096 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 04:54:26,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:54:26,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 96 conjunts are in the unsatisfiable core [2023-04-01 04:54:26,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:54:26,311 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-01 04:54:26,423 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-04-01 04:54:26,423 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-04-01 04:54:26,471 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-04-01 04:54:26,476 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 16 [2023-04-01 04:54:26,488 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-04-01 04:54:26,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 43 [2023-04-01 04:54:26,699 INFO L321 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-04-01 04:54:26,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 84 treesize of output 29 [2023-04-01 04:54:26,712 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 04:54:27,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:54:27,301 INFO L321 Elim1Store]: treesize reduction 59, result has 43.8 percent of original size [2023-04-01 04:54:27,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 106 treesize of output 153 [2023-04-01 04:54:27,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:54:27,406 INFO L321 Elim1Store]: treesize reduction 138, result has 31.3 percent of original size [2023-04-01 04:54:27,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 152 treesize of output 199 [2023-04-01 04:54:27,462 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 17 [2023-04-01 04:54:27,481 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 37 [2023-04-01 04:54:27,520 INFO L321 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2023-04-01 04:54:27,520 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 34 [2023-04-01 04:54:27,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 15 [2023-04-01 04:54:27,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:54:27,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 22 [2023-04-01 04:54:27,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:54:27,860 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 04:54:27,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 286 treesize of output 213 [2023-04-01 04:54:28,097 INFO L321 Elim1Store]: treesize reduction 20, result has 56.5 percent of original size [2023-04-01 04:54:28,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 509 treesize of output 514 [2023-04-01 04:54:28,364 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 04:54:28,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:54:28,489 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 18 [2023-04-01 04:54:28,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:54:28,554 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 433 treesize of output 423 [2023-04-01 04:54:28,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:54:28,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 258 treesize of output 256 [2023-04-01 04:54:28,744 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 32 [2023-04-01 04:54:28,793 INFO L321 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-04-01 04:54:28,794 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 24 [2023-04-01 04:54:28,823 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:54:28,823 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:54:29,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844276425] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:54:29,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1063291312] [2023-04-01 04:54:29,161 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2023-04-01 04:54:29,161 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:54:29,161 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:54:29,161 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:54:29,161 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:54:29,176 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:54:29,406 INFO L197 IcfgInterpreter]: Interpreting procedure dll_append with input of size 36 for LOIs [2023-04-01 04:54:29,603 INFO L197 IcfgInterpreter]: Interpreting procedure dll_create with input of size 44 for LOIs [2023-04-01 04:54:29,862 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 15 for LOIs [2023-04-01 04:54:29,876 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:54:29,879 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:54:35,186 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1117#(and (= main_~data~0 1) (<= 1 |#StackHeapBarrier|) (= |main_~#s~0.offset| 0) (= main_~count~0 0) (= main_~ptr~0.base (select (select |#memory_$Pointer$.base| |main_~#s~0.base|) 0)) (= (select (select |#memory_$Pointer$.offset| main_~ptr~0.base) (+ main_~ptr~0.offset 4)) 0) (= main_~len~0 2) (= (select (select |#memory_$Pointer$.base| main_~ptr~0.base) (+ main_~ptr~0.offset 4)) 0) (= |#NULL.offset| 0) (= 5 main_~uneq~0) (= (select (select |#memory_$Pointer$.offset| |main_~#s~0.base|) 0) main_~ptr~0.offset) (<= (+ |#StackHeapBarrier| 1) |main_~#s~0.base|) (= |#NULL.base| 0))' at error location [2023-04-01 04:54:35,186 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:54:35,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-04-01 04:54:35,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 39 [2023-04-01 04:54:35,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144292184] [2023-04-01 04:54:35,186 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-04-01 04:54:35,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-04-01 04:54:35,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:54:35,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-04-01 04:54:35,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=4183, Unknown=14, NotChecked=0, Total=4422 [2023-04-01 04:54:35,191 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 39 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 31 states have internal predecessors, (45), 7 states have call successors, (9), 3 states have call predecessors, (9), 10 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2023-04-01 04:54:39,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:54:39,213 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2023-04-01 04:54:39,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-04-01 04:54:39,214 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 31 states have internal predecessors, (45), 7 states have call successors, (9), 3 states have call predecessors, (9), 10 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) Word has length 42 [2023-04-01 04:54:39,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:54:39,215 INFO L225 Difference]: With dead ends: 57 [2023-04-01 04:54:39,215 INFO L226 Difference]: Without dead ends: 44 [2023-04-01 04:54:39,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2021 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=373, Invalid=7259, Unknown=24, NotChecked=0, Total=7656 [2023-04-01 04:54:39,217 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 52 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 18 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-04-01 04:54:39,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 403 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 842 Invalid, 14 Unknown, 0 Unchecked, 1.8s Time] [2023-04-01 04:54:39,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-04-01 04:54:39,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2023-04-01 04:54:39,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 04:54:39,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2023-04-01 04:54:39,225 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 42 [2023-04-01 04:54:39,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:54:39,225 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2023-04-01 04:54:39,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 31 states have internal predecessors, (45), 7 states have call successors, (9), 3 states have call predecessors, (9), 10 states have return successors, (10), 10 states have call predecessors, (10), 7 states have call successors, (10) [2023-04-01 04:54:39,225 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2023-04-01 04:54:39,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-04-01 04:54:39,226 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:54:39,227 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:54:39,233 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 04:54:39,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:54:39,434 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:54:39,434 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:54:39,434 INFO L85 PathProgramCache]: Analyzing trace with hash 1471204879, now seen corresponding path program 1 times [2023-04-01 04:54:39,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:54:39,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017005860] [2023-04-01 04:54:39,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:54:39,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:54:39,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:55:02,676 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:55:02,676 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:55:02,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017005860] [2023-04-01 04:55:02,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017005860] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:55:02,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818573602] [2023-04-01 04:55:02,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:55:02,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:55:02,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:55:02,678 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 04:55:02,680 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 04:55:02,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:55:02,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 155 conjunts are in the unsatisfiable core [2023-04-01 04:55:02,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:55:03,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-01 04:55:06,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-04-01 04:55:08,965 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-04-01 04:55:08,966 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-04-01 04:55:09,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 21 [2023-04-01 04:55:09,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-04-01 04:55:09,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2023-04-01 04:55:09,317 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-04-01 04:55:09,317 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 48 [2023-04-01 04:55:09,335 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20