/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 EqDomain -i ../sv-benchmarks/c/list-simple/dll2n_remove_all.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:57:57,959 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:57:57,961 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:57:57,999 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:57:58,000 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:57:58,000 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:57:58,002 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:57:58,003 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:57:58,004 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:57:58,005 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:57:58,006 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:57:58,006 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:57:58,007 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:57:58,008 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:57:58,008 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:57:58,009 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:57:58,010 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:57:58,011 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:57:58,012 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:57:58,015 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:57:58,016 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:57:58,019 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:57:58,019 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:57:58,020 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:57:58,023 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:57:58,024 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:57:58,024 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:57:58,025 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:57:58,025 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:57:58,026 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:57:58,026 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:57:58,026 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:57:58,027 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:57:58,027 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:57:58,028 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:57:58,034 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:57:58,035 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:57:58,035 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:57:58,035 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:57:58,036 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:57:58,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:57:58,037 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 10:57:58,072 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:57:58,072 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:57:58,072 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:57:58,072 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:57:58,073 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:57:58,073 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:57:58,074 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:57:58,074 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:57:58,074 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:57:58,074 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:57:58,075 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:57:58,075 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:57:58,075 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:57:58,075 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:57:58,075 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:57:58,075 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:57:58,076 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:57:58,076 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:57:58,076 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:57:58,076 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:57:58,076 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:57:58,077 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:57:58,077 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:57:58,077 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:57:58,077 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:57:58,077 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:57:58,077 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:57:58,077 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:57:58,077 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:57:58,077 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:57:58,078 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:57:58,078 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:57:58,078 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:57:58,078 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:57:58,078 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:57:58,078 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:57:58,079 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:57:58,079 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:57:58,079 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:57:58,079 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:57:58,079 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:57:58,079 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:57:58,276 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:57:58,293 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:57:58,295 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:57:58,296 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:57:58,297 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:57:58,298 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2n_remove_all.i [2023-04-01 10:57:59,412 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:57:59,675 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:57:59,676 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2n_remove_all.i [2023-04-01 10:57:59,693 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/972eb478d/5d07df550a6d423bbbeb235e8f11474d/FLAG14d3f1938 [2023-04-01 10:57:59,704 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/972eb478d/5d07df550a6d423bbbeb235e8f11474d [2023-04-01 10:57:59,707 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:57:59,709 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:57:59,711 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:57:59,711 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:57:59,715 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:57:59,716 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:57:59" (1/1) ... [2023-04-01 10:57:59,718 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17f48b6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:57:59, skipping insertion in model container [2023-04-01 10:57:59,719 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:57:59" (1/1) ... [2023-04-01 10:57:59,725 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:57:59,768 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:58:00,075 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_remove_all.i[24090,24103] [2023-04-01 10:58:00,079 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:58:00,089 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:58:00,121 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_remove_all.i[24090,24103] [2023-04-01 10:58:00,121 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:58:00,168 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:58:00,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:58:00 WrapperNode [2023-04-01 10:58:00,169 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:58:00,170 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:58:00,170 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:58:00,170 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:58:00,180 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:58:00" (1/1) ... [2023-04-01 10:58:00,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:58:00" (1/1) ... [2023-04-01 10:58:00,195 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:58:00" (1/1) ... [2023-04-01 10:58:00,196 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:58:00" (1/1) ... [2023-04-01 10:58:00,209 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:58:00" (1/1) ... [2023-04-01 10:58:00,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:58:00" (1/1) ... [2023-04-01 10:58:00,219 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:58:00" (1/1) ... [2023-04-01 10:58:00,220 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:58:00" (1/1) ... [2023-04-01 10:58:00,225 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:58:00,226 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:58:00,226 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:58:00,226 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:58:00,227 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:58:00" (1/1) ... [2023-04-01 10:58:00,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:58:00,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:58:00,259 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 10:58:00,268 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 10:58:00,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:58:00,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:58:00,295 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:58:00,295 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2023-04-01 10:58:00,295 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2023-04-01 10:58:00,295 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-04-01 10:58:00,295 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-04-01 10:58:00,296 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2023-04-01 10:58:00,296 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_remove_first [2023-04-01 10:58:00,296 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:58:00,296 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:58:00,296 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:58:00,296 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 10:58:00,296 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 10:58:00,296 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:58:00,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:58:00,297 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2023-04-01 10:58:00,297 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2023-04-01 10:58:00,297 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-04-01 10:58:00,297 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-04-01 10:58:00,297 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-04-01 10:58:00,297 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-04-01 10:58:00,297 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-04-01 10:58:00,297 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-04-01 10:58:00,297 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-04-01 10:58:00,297 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-04-01 10:58:00,297 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-04-01 10:58:00,298 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-04-01 10:58:00,298 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-04-01 10:58:00,298 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-04-01 10:58:00,298 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-04-01 10:58:00,298 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-04-01 10:58:00,298 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-04-01 10:58:00,298 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-04-01 10:58:00,298 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-04-01 10:58:00,299 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-04-01 10:58:00,299 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-04-01 10:58:00,299 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-04-01 10:58:00,299 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-04-01 10:58:00,299 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-04-01 10:58:00,299 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-04-01 10:58:00,299 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-04-01 10:58:00,299 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-04-01 10:58:00,299 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-04-01 10:58:00,300 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-04-01 10:58:00,300 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-04-01 10:58:00,300 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-04-01 10:58:00,300 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-04-01 10:58:00,300 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-04-01 10:58:00,300 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-04-01 10:58:00,300 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-04-01 10:58:00,300 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-04-01 10:58:00,300 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-04-01 10:58:00,301 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-04-01 10:58:00,301 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-04-01 10:58:00,301 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-04-01 10:58:00,301 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-04-01 10:58:00,301 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-04-01 10:58:00,301 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-04-01 10:58:00,301 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-04-01 10:58:00,301 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-04-01 10:58:00,302 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-04-01 10:58:00,302 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-04-01 10:58:00,302 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-04-01 10:58:00,302 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-04-01 10:58:00,302 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-04-01 10:58:00,302 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-04-01 10:58:00,302 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-04-01 10:58:00,302 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 10:58:00,302 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-04-01 10:58:00,302 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-04-01 10:58:00,303 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 10:58:00,303 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-04-01 10:58:00,303 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-04-01 10:58:00,303 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-04-01 10:58:00,303 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-04-01 10:58:00,303 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2023-04-01 10:58:00,303 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-04-01 10:58:00,303 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2023-04-01 10:58:00,303 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-04-01 10:58:00,303 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:58:00,304 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2023-04-01 10:58:00,304 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-04-01 10:58:00,304 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-04-01 10:58:00,304 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-04-01 10:58:00,304 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-04-01 10:58:00,304 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-04-01 10:58:00,304 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-04-01 10:58:00,304 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-04-01 10:58:00,304 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-04-01 10:58:00,305 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-04-01 10:58:00,305 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-04-01 10:58:00,305 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-04-01 10:58:00,305 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-04-01 10:58:00,305 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-04-01 10:58:00,305 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-04-01 10:58:00,305 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-04-01 10:58:00,305 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-04-01 10:58:00,305 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-04-01 10:58:00,305 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-04-01 10:58:00,305 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-04-01 10:58:00,306 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-04-01 10:58:00,306 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-04-01 10:58:00,306 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-04-01 10:58:00,306 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-04-01 10:58:00,306 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-04-01 10:58:00,306 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-04-01 10:58:00,306 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-04-01 10:58:00,306 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-04-01 10:58:00,306 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-04-01 10:58:00,307 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-04-01 10:58:00,307 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-04-01 10:58:00,307 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-04-01 10:58:00,307 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-04-01 10:58:00,307 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-04-01 10:58:00,307 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-04-01 10:58:00,307 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-04-01 10:58:00,307 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-04-01 10:58:00,307 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-04-01 10:58:00,308 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-04-01 10:58:00,308 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-04-01 10:58:00,308 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-04-01 10:58:00,308 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 10:58:00,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 10:58:00,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:58:00,308 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2023-04-01 10:58:00,308 INFO L130 BoogieDeclarations]: Found specification of procedure dll_remove_first [2023-04-01 10:58:00,308 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 10:58:00,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:58:00,309 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:58:00,309 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 10:58:00,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-04-01 10:58:00,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:58:00,309 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:58:00,309 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:58:00,309 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:58:00,504 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:58:00,506 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:58:00,543 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-04-01 10:58:00,740 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:58:00,786 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:58:00,786 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 10:58:00,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:58:00 BoogieIcfgContainer [2023-04-01 10:58:00,788 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:58:00,790 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:58:00,790 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:58:00,793 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:58:00,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:57:59" (1/3) ... [2023-04-01 10:58:00,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c433c81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:58:00, skipping insertion in model container [2023-04-01 10:58:00,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:58:00" (2/3) ... [2023-04-01 10:58:00,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c433c81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:58:00, skipping insertion in model container [2023-04-01 10:58:00,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:58:00" (3/3) ... [2023-04-01 10:58:00,796 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2n_remove_all.i [2023-04-01 10:58:00,812 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:58:00,813 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:58:00,854 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:58:00,861 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;@53e35f24, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:58:00,861 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:58:00,865 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 10:58:00,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-01 10:58:00,872 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:58:00,872 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:58:00,873 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:58:00,877 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:58:00,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1032397593, now seen corresponding path program 1 times [2023-04-01 10:58:00,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:58:00,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944885741] [2023-04-01 10:58:00,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:58:00,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:58:00,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:58:01,240 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 10:58:01,241 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:58:01,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944885741] [2023-04-01 10:58:01,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944885741] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:58:01,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:58:01,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:58:01,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363454006] [2023-04-01 10:58:01,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:58:01,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:58:01,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:58:01,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:58:01,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:58:01,296 INFO L87 Difference]: Start difference. First operand has 27 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:58:01,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:58:01,400 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2023-04-01 10:58:01,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 10:58:01,403 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 13 [2023-04-01 10:58:01,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:58:01,408 INFO L225 Difference]: With dead ends: 45 [2023-04-01 10:58:01,408 INFO L226 Difference]: Without dead ends: 23 [2023-04-01 10:58:01,410 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 10:58:01,416 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 12 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 10:58:01,418 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 74 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 10:58:01,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-01 10:58:01,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2023-04-01 10:58:01,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 10:58:01,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2023-04-01 10:58:01,446 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 13 [2023-04-01 10:58:01,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:58:01,446 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2023-04-01 10:58:01,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:58:01,447 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2023-04-01 10:58:01,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-01 10:58:01,447 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:58:01,447 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:58:01,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:58:01,448 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:58:01,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:58:01,448 INFO L85 PathProgramCache]: Analyzing trace with hash -711141340, now seen corresponding path program 1 times [2023-04-01 10:58:01,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:58:01,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290105205] [2023-04-01 10:58:01,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:58:01,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:58:01,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:58:01,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:58:01,662 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:58:01,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290105205] [2023-04-01 10:58:01,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290105205] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:58:01,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248520215] [2023-04-01 10:58:01,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:58:01,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:58:01,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:58:01,666 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 10:58:01,678 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 10:58:01,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:58:01,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 10:58:01,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:58:01,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:58:01,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:58:02,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:58:02,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248520215] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:58:02,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1591708431] [2023-04-01 10:58:02,157 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 10:58:02,157 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:58:02,160 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:58:02,167 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:58:02,168 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:58:02,306 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-01 10:58:02,912 INFO L197 IcfgInterpreter]: Interpreting procedure dll_create with input of size 68 for LOIs [2023-04-01 10:58:03,402 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 10:58:03,407 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 10:58:04,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1591708431] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:58:04,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-01 10:58:04,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [6, 6, 6] total 24 [2023-04-01 10:58:04,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632336165] [2023-04-01 10:58:04,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:58:04,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 10:58:04,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:58:04,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 10:58:04,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2023-04-01 10:58:04,216 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:58:05,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:58:05,711 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2023-04-01 10:58:05,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-04-01 10:58:05,712 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2023-04-01 10:58:05,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:58:05,717 INFO L225 Difference]: With dead ends: 27 [2023-04-01 10:58:05,717 INFO L226 Difference]: Without dead ends: 24 [2023-04-01 10:58:05,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2023-04-01 10:58:05,719 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 27 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 10:58:05,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 5 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 10:58:05,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-01 10:58:05,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2023-04-01 10:58:05,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 10:58:05,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2023-04-01 10:58:05,730 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 16 [2023-04-01 10:58:05,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:58:05,730 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2023-04-01 10:58:05,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 10:58:05,731 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2023-04-01 10:58:05,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 10:58:05,731 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:58:05,731 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] [2023-04-01 10:58:05,743 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 10:58:05,938 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 10:58:05,938 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:58:05,939 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:58:05,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1770617266, now seen corresponding path program 1 times [2023-04-01 10:58:05,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:58:05,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062021063] [2023-04-01 10:58:05,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:58:05,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:58:05,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:58:06,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 10:58:06,151 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:58:06,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062021063] [2023-04-01 10:58:06,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062021063] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:58:06,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531215403] [2023-04-01 10:58:06,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:58:06,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:58:06,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:58:06,153 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 10:58:06,156 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 10:58:06,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:58:06,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 10:58:06,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:58:06,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 10:58:06,328 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:58:06,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 10:58:06,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531215403] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:58:06,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1461125548] [2023-04-01 10:58:06,408 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-01 10:58:06,408 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:58:06,409 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:58:06,409 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:58:06,409 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:58:06,447 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-01 10:58:07,282 INFO L197 IcfgInterpreter]: Interpreting procedure dll_remove_first with input of size 64 for LOIs [2023-04-01 10:58:07,315 INFO L197 IcfgInterpreter]: Interpreting procedure dll_create with input of size 68 for LOIs [2023-04-01 10:58:07,578 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 10:58:07,581 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 10:58:14,042 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '485#(and (= main_~data~0 1) (= (select |old(#valid)| |main_~#s~0.base|) 0) (= |main_~#s~0.offset| 0) (= (select |old(#valid)| 1) 1) (= (select |old(#length)| 1) 2) (< main_~i~0 0) (= (select |old(#valid)| 0) 0) (not (= |#StackHeapBarrier| 0)) (= main_~len~0 2) (or (not (= (select (select |#memory_$Pointer$.base| |main_~#s~0.base|) 0) 0)) (not (= (select (select |#memory_$Pointer$.offset| |main_~#s~0.base|) 0) 0))) (= (select (select |old(#memory_int)| 1) 0) 48) (not (= |main_~#s~0.base| 0)) (= |#NULL.offset| 0) (= 19 (select |old(#length)| 2)) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (not (= |main_~#s~0.base| |#StackHeapBarrier|)) (= |#NULL.base| 0))' at error location [2023-04-01 10:58:14,043 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 10:58:14,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 10:58:14,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-04-01 10:58:14,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32972886] [2023-04-01 10:58:14,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 10:58:14,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 10:58:14,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:58:14,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 10:58:14,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2023-04-01 10:58:14,045 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 12 states, 8 states have (on average 3.25) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2023-04-01 10:58:14,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:58:14,601 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2023-04-01 10:58:14,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 10:58:14,601 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 3.25) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) Word has length 21 [2023-04-01 10:58:14,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:58:14,602 INFO L225 Difference]: With dead ends: 38 [2023-04-01 10:58:14,602 INFO L226 Difference]: Without dead ends: 27 [2023-04-01 10:58:14,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2023-04-01 10:58:14,604 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 10:58:14,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 63 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 10:58:14,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-04-01 10:58:14,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2023-04-01 10:58:14,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 10:58:14,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2023-04-01 10:58:14,612 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 21 [2023-04-01 10:58:14,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:58:14,612 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2023-04-01 10:58:14,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 3.25) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2023-04-01 10:58:14,612 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2023-04-01 10:58:14,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 10:58:14,613 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:58:14,613 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] [2023-04-01 10:58:14,619 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 10:58:14,819 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 10:58:14,820 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:58:14,820 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:58:14,820 INFO L85 PathProgramCache]: Analyzing trace with hash 754319449, now seen corresponding path program 2 times [2023-04-01 10:58:14,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:58:14,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071136523] [2023-04-01 10:58:14,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:58:14,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:58:14,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:58:15,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 10:58:15,055 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:58:15,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071136523] [2023-04-01 10:58:15,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071136523] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:58:15,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533308366] [2023-04-01 10:58:15,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 10:58:15,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:58:15,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:58:15,058 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 10:58:15,061 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 10:58:15,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 10:58:15,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 10:58:15,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 10:58:15,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:58:15,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 10:58:15,368 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:58:15,512 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 10:58:15,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533308366] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 10:58:15,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1565957298] [2023-04-01 10:58:15,514 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-01 10:58:15,514 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:58:15,515 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:58:15,515 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:58:15,515 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:58:15,588 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-01 10:58:16,376 INFO L197 IcfgInterpreter]: Interpreting procedure dll_remove_first with input of size 64 for LOIs [2023-04-01 10:58:16,405 INFO L197 IcfgInterpreter]: Interpreting procedure dll_create with input of size 68 for LOIs [2023-04-01 10:58:16,707 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 10:58:16,716 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 10:58:25,983 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '750#(and (= main_~data~0 1) (= (select |old(#valid)| |main_~#s~0.base|) 0) (= |main_~#s~0.offset| 0) (= (select |old(#valid)| 1) 1) (= (select |old(#length)| 1) 2) (< main_~i~0 0) (= (select |old(#valid)| 0) 0) (not (= |#StackHeapBarrier| 0)) (= main_~len~0 2) (or (not (= (select (select |#memory_$Pointer$.base| |main_~#s~0.base|) 0) 0)) (not (= (select (select |#memory_$Pointer$.offset| |main_~#s~0.base|) 0) 0))) (= (select (select |old(#memory_int)| 1) 0) 48) (not (= |main_~#s~0.base| 0)) (= |#NULL.offset| 0) (= 19 (select |old(#length)| 2)) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (not (= |main_~#s~0.base| |#StackHeapBarrier|)) (= |#NULL.base| 0))' at error location [2023-04-01 10:58:25,983 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 10:58:25,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 10:58:25,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2023-04-01 10:58:25,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554029787] [2023-04-01 10:58:25,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 10:58:25,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 10:58:25,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:58:25,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 10:58:25,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2023-04-01 10:58:25,985 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 10:58:26,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:58:26,414 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2023-04-01 10:58:26,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 10:58:26,414 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 24 [2023-04-01 10:58:26,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:58:26,415 INFO L225 Difference]: With dead ends: 31 [2023-04-01 10:58:26,415 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 10:58:26,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2023-04-01 10:58:26,416 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 10 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 10:58:26,416 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 38 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 10:58:26,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 10:58:26,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-04-01 10:58:26,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 10:58:26,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2023-04-01 10:58:26,425 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 24 [2023-04-01 10:58:26,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:58:26,425 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2023-04-01 10:58:26,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 10:58:26,426 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2023-04-01 10:58:26,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 10:58:26,427 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:58:26,427 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:58:26,433 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 10:58:26,629 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 10:58:26,629 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:58:26,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:58:26,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1962461383, now seen corresponding path program 3 times [2023-04-01 10:58:26,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:58:26,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599157378] [2023-04-01 10:58:26,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:58:26,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:58:26,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:58:32,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 10:58:32,689 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:58:32,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599157378] [2023-04-01 10:58:32,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599157378] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:58:32,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100958260] [2023-04-01 10:58:32,689 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 10:58:32,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:58:32,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:58:32,696 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 10:58:32,697 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 10:58:33,306 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 10:58:33,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 10:58:33,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 148 conjunts are in the unsatisfiable core [2023-04-01 10:58:33,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:58:33,890 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 10:58:34,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-04-01 10:58:34,343 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-04-01 10:58:34,789 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-04-01 10:58:34,789 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 1 case distinctions, treesize of input 11 treesize of output 11 [2023-04-01 10:58:35,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 10:58:35,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 25 [2023-04-01 10:58:35,265 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 11 treesize of output 15 [2023-04-01 10:58:35,301 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 29 treesize of output 28 [2023-04-01 10:58:35,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 10:58:35,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 26 [2023-04-01 10:58:35,364 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 18 treesize of output 26 [2023-04-01 10:58:35,418 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 23 treesize of output 29 [2023-04-01 10:58:38,391 INFO L321 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-04-01 10:58:38,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 215 treesize of output 105 [2023-04-01 10:58:38,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 10:58:38,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 10:58:38,480 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:58:38,480 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 76 treesize of output 56 [2023-04-01 10:58:39,283 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 25 treesize of output 21 [2023-04-01 10:58:39,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 25 treesize of output 21 [2023-04-01 10:58:39,719 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-04-01 10:58:39,719 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 58 treesize of output 33 [2023-04-01 10:58:39,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 10:58:39,752 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:58:39,752 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 13 [2023-04-01 10:58:40,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 10:58:40,153 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 10:58:50,486 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:58:50,486 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 428 treesize of output 312 [2023-04-01 10:58:50,497 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Complicated and unsupported kind of self-update: (store (store |v_#memory_$Pointer$.base_159| v_dll_create_~new_head~0.base_45 (store (store (select |v_#memory_$Pointer$.base_159| v_dll_create_~new_head~0.base_45) 4 0) 8 0)) (select (select |v_#memory_$Pointer$.base_160| |main_~#s~0.base|) |main_~#s~0.offset|) (store (store v_ArrVal_672 4 v_dll_create_~new_head~0.base_45) 8 0)) [2023-04-01 10:58:50,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1615543554] [2023-04-01 10:58:50,498 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-01 10:58:50,498 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 10:58:50,499 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 10:58:50,499 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 10:58:50,499 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 10:58:50,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 10:58:50,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:58:50,706 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Script currently locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@af74eaa at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.assertScriptNotLocked(ManagedScript.java:109) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:281) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminateLight(PartialQuantifierElimination.java:109) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$TermDomainOperationProviderWithLightElimination.newQuantifier(SymbolicTools.java:284) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$TermDomainOperationProviderWithLightElimination.projectExistentially(SymbolicTools.java:270) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostconditionCall(PredicateTransformer.java:157) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.postCall(SymbolicTools.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:218) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:207) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:148) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:262) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2023-04-01 10:58:50,710 INFO L158 Benchmark]: Toolchain (without parser) took 51001.35ms. Allocated memory was 265.3MB in the beginning and 476.1MB in the end (delta: 210.8MB). Free memory was 233.1MB in the beginning and 381.6MB in the end (delta: -148.6MB). Peak memory consumption was 63.9MB. Max. memory is 8.0GB. [2023-04-01 10:58:50,710 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 183.5MB. Free memory is still 128.5MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 10:58:50,710 INFO L158 Benchmark]: CACSL2BoogieTranslator took 458.11ms. Allocated memory is still 265.3MB. Free memory was 232.7MB in the beginning and 215.6MB in the end (delta: 17.1MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. [2023-04-01 10:58:50,710 INFO L158 Benchmark]: Boogie Preprocessor took 55.70ms. Allocated memory is still 265.3MB. Free memory was 215.6MB in the beginning and 212.8MB in the end (delta: 2.8MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-04-01 10:58:50,710 INFO L158 Benchmark]: RCFGBuilder took 562.50ms. Allocated memory is still 265.3MB. Free memory was 212.8MB in the beginning and 185.9MB in the end (delta: 26.9MB). Peak memory consumption was 26.2MB. Max. memory is 8.0GB. [2023-04-01 10:58:50,711 INFO L158 Benchmark]: TraceAbstraction took 49919.00ms. Allocated memory was 265.3MB in the beginning and 476.1MB in the end (delta: 210.8MB). Free memory was 185.2MB in the beginning and 381.6MB in the end (delta: -196.5MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. [2023-04-01 10:58:50,712 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 183.5MB. Free memory is still 128.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 458.11ms. Allocated memory is still 265.3MB. Free memory was 232.7MB in the beginning and 215.6MB in the end (delta: 17.1MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 55.70ms. Allocated memory is still 265.3MB. Free memory was 215.6MB in the beginning and 212.8MB in the end (delta: 2.8MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * RCFGBuilder took 562.50ms. Allocated memory is still 265.3MB. Free memory was 212.8MB in the beginning and 185.9MB in the end (delta: 26.9MB). Peak memory consumption was 26.2MB. Max. memory is 8.0GB. * TraceAbstraction took 49919.00ms. Allocated memory was 265.3MB in the beginning and 476.1MB in the end (delta: 210.8MB). Free memory was 185.2MB in the beginning and 381.6MB in the end (delta: -196.5MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Script currently locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@af74eaa de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Script currently locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@af74eaa: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.assertScriptNotLocked(ManagedScript.java:109) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2023-04-01 10:58:50,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...