/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/list-simple/dll2n_insert_unequal.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-02 21:45:33,104 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-02 21:45:33,105 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-02 21:45:33,133 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-02 21:45:33,133 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-02 21:45:33,135 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-02 21:45:33,139 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-02 21:45:33,141 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-02 21:45:33,142 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-02 21:45:33,146 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-02 21:45:33,148 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-02 21:45:33,149 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-02 21:45:33,149 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-02 21:45:33,151 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-02 21:45:33,152 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-02 21:45:33,153 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-02 21:45:33,154 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-02 21:45:33,154 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-02 21:45:33,155 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-02 21:45:33,159 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-02 21:45:33,160 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-02 21:45:33,161 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-02 21:45:33,161 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-02 21:45:33,162 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-02 21:45:33,168 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-02 21:45:33,169 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-02 21:45:33,169 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-02 21:45:33,170 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-02 21:45:33,170 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-02 21:45:33,171 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-02 21:45:33,171 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-02 21:45:33,172 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-02 21:45:33,173 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-02 21:45:33,173 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-02 21:45:33,174 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-02 21:45:33,174 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-02 21:45:33,174 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-02 21:45:33,174 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-02 21:45:33,175 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-02 21:45:33,175 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-02 21:45:33,175 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-02 21:45:33,177 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 [2023-04-02 21:45:33,203 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-02 21:45:33,204 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-02 21:45:33,204 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-02 21:45:33,204 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-02 21:45:33,205 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-02 21:45:33,205 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-02 21:45:33,205 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-02 21:45:33,205 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-02 21:45:33,205 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-02 21:45:33,205 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-02 21:45:33,206 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-02 21:45:33,206 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-02 21:45:33,206 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-02 21:45:33,206 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-02 21:45:33,206 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-02 21:45:33,206 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-02 21:45:33,206 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-02 21:45:33,207 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-02 21:45:33,207 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-02 21:45:33,207 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-02 21:45:33,207 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-02 21:45:33,207 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-02 21:45:33,207 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-02 21:45:33,207 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-02 21:45:33,208 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-02 21:45:33,208 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-02 21:45:33,208 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-02 21:45:33,208 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-02 21:45:33,208 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-02 21:45:33,208 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-02 21:45:33,208 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-02 21:45:33,208 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-02 21:45:33,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 21:45:33,208 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-02 21:45:33,209 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-02 21:45:33,209 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-02 21:45:33,209 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-02 21:45:33,209 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-02 21:45:33,209 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-02 21:45:33,209 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-02 21:45:33,209 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-02 21:45:33,209 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-02 21:45:33,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-02 21:45:33,424 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-02 21:45:33,426 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-02 21:45:33,427 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-02 21:45:33,427 INFO L275 PluginConnector]: CDTParser initialized [2023-04-02 21:45:33,428 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2n_insert_unequal.i [2023-04-02 21:45:34,455 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-02 21:45:34,676 INFO L351 CDTParser]: Found 1 translation units. [2023-04-02 21:45:34,677 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2n_insert_unequal.i [2023-04-02 21:45:34,685 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a401ba082/9048817aedd644c58908b82e5b1dbae3/FLAG02bc34835 [2023-04-02 21:45:34,697 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a401ba082/9048817aedd644c58908b82e5b1dbae3 [2023-04-02 21:45:34,699 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-02 21:45:34,700 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-02 21:45:34,703 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-02 21:45:34,703 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-02 21:45:34,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-02 21:45:34,706 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 09:45:34" (1/1) ... [2023-04-02 21:45:34,707 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b251fa0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:45:34, skipping insertion in model container [2023-04-02 21:45:34,707 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.04 09:45:34" (1/1) ... [2023-04-02 21:45:34,712 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-02 21:45:34,746 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-02 21:45:34,921 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_insert_unequal.i[24989,25002] [2023-04-02 21:45:34,924 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 21:45:34,936 INFO L203 MainTranslator]: Completed pre-run [2023-04-02 21:45:34,988 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_insert_unequal.i[24989,25002] [2023-04-02 21:45:34,992 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-02 21:45:35,014 INFO L208 MainTranslator]: Completed translation [2023-04-02 21:45:35,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:45:35 WrapperNode [2023-04-02 21:45:35,014 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-02 21:45:35,015 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-02 21:45:35,015 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-02 21:45:35,015 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-02 21:45:35,024 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:45:35" (1/1) ... [2023-04-02 21:45:35,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:45:35" (1/1) ... [2023-04-02 21:45:35,037 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:45:35" (1/1) ... [2023-04-02 21:45:35,037 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:45:35" (1/1) ... [2023-04-02 21:45:35,048 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:45:35" (1/1) ... [2023-04-02 21:45:35,051 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:45:35" (1/1) ... [2023-04-02 21:45:35,053 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:45:35" (1/1) ... [2023-04-02 21:45:35,054 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:45:35" (1/1) ... [2023-04-02 21:45:35,058 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-02 21:45:35,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-02 21:45:35,059 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-02 21:45:35,059 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-02 21:45:35,059 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:45:35" (1/1) ... [2023-04-02 21:45:35,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-02 21:45:35,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:45:35,090 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) [2023-04-02 21:45:35,097 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 [2023-04-02 21:45:35,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-02 21:45:35,132 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-02 21:45:35,132 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-02 21:45:35,133 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2023-04-02 21:45:35,136 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2023-04-02 21:45:35,136 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-04-02 21:45:35,136 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-04-02 21:45:35,137 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2023-04-02 21:45:35,137 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_destroy [2023-04-02 21:45:35,137 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_insert [2023-04-02 21:45:35,137 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-02 21:45:35,137 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-02 21:45:35,137 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-02 21:45:35,137 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-02 21:45:35,137 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-02 21:45:35,137 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-02 21:45:35,138 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-02 21:45:35,138 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2023-04-02 21:45:35,138 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2023-04-02 21:45:35,138 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-04-02 21:45:35,138 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-04-02 21:45:35,138 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-04-02 21:45:35,138 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-04-02 21:45:35,138 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-04-02 21:45:35,138 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-04-02 21:45:35,138 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-04-02 21:45:35,138 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-04-02 21:45:35,138 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-04-02 21:45:35,139 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-04-02 21:45:35,139 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-04-02 21:45:35,139 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-04-02 21:45:35,139 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-04-02 21:45:35,139 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-04-02 21:45:35,139 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-04-02 21:45:35,139 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-04-02 21:45:35,139 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-04-02 21:45:35,139 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-04-02 21:45:35,139 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-04-02 21:45:35,140 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-04-02 21:45:35,140 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-04-02 21:45:35,140 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-04-02 21:45:35,140 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-04-02 21:45:35,140 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-04-02 21:45:35,141 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-04-02 21:45:35,141 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-04-02 21:45:35,142 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-04-02 21:45:35,142 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-04-02 21:45:35,142 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-04-02 21:45:35,142 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-04-02 21:45:35,142 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-04-02 21:45:35,142 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-04-02 21:45:35,142 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-04-02 21:45:35,142 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-04-02 21:45:35,142 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-04-02 21:45:35,143 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-04-02 21:45:35,143 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-04-02 21:45:35,143 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-04-02 21:45:35,143 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-04-02 21:45:35,143 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-04-02 21:45:35,144 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-04-02 21:45:35,144 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-04-02 21:45:35,144 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-04-02 21:45:35,144 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-04-02 21:45:35,144 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-04-02 21:45:35,144 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-04-02 21:45:35,144 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-04-02 21:45:35,144 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-04-02 21:45:35,145 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-04-02 21:45:35,145 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-04-02 21:45:35,145 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-02 21:45:35,145 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-04-02 21:45:35,145 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-04-02 21:45:35,145 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-02 21:45:35,145 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-04-02 21:45:35,145 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-04-02 21:45:35,145 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-04-02 21:45:35,145 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-04-02 21:45:35,145 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2023-04-02 21:45:35,145 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-04-02 21:45:35,145 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2023-04-02 21:45:35,145 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-04-02 21:45:35,146 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-02 21:45:35,146 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2023-04-02 21:45:35,146 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-04-02 21:45:35,146 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-04-02 21:45:35,146 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-04-02 21:45:35,146 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-04-02 21:45:35,146 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-04-02 21:45:35,146 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-04-02 21:45:35,146 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-04-02 21:45:35,146 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-04-02 21:45:35,146 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-04-02 21:45:35,147 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-04-02 21:45:35,147 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-04-02 21:45:35,147 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-04-02 21:45:35,147 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-04-02 21:45:35,147 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-04-02 21:45:35,147 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-04-02 21:45:35,147 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-04-02 21:45:35,147 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-04-02 21:45:35,147 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-04-02 21:45:35,147 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-04-02 21:45:35,147 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-04-02 21:45:35,147 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-04-02 21:45:35,147 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-04-02 21:45:35,147 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-04-02 21:45:35,148 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-04-02 21:45:35,148 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-04-02 21:45:35,148 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-04-02 21:45:35,148 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-04-02 21:45:35,148 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-04-02 21:45:35,148 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-04-02 21:45:35,148 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-04-02 21:45:35,148 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-04-02 21:45:35,148 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-04-02 21:45:35,148 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-04-02 21:45:35,148 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-04-02 21:45:35,149 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-04-02 21:45:35,149 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-04-02 21:45:35,149 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-04-02 21:45:35,150 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-04-02 21:45:35,151 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-04-02 21:45:35,152 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-04-02 21:45:35,152 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-02 21:45:35,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-02 21:45:35,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-02 21:45:35,157 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2023-04-02 21:45:35,157 INFO L130 BoogieDeclarations]: Found specification of procedure dll_destroy [2023-04-02 21:45:35,157 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-02 21:45:35,157 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-02 21:45:35,157 INFO L130 BoogieDeclarations]: Found specification of procedure dll_insert [2023-04-02 21:45:35,158 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-02 21:45:35,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-02 21:45:35,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-04-02 21:45:35,158 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-02 21:45:35,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-02 21:45:35,158 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-02 21:45:35,158 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-02 21:45:35,382 INFO L236 CfgBuilder]: Building ICFG [2023-04-02 21:45:35,383 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-02 21:45:35,461 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-04-02 21:45:35,633 INFO L277 CfgBuilder]: Performing block encoding [2023-04-02 21:45:35,711 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-02 21:45:35,712 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-04-02 21:45:35,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 09:45:35 BoogieIcfgContainer [2023-04-02 21:45:35,713 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-02 21:45:35,715 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-02 21:45:35,715 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-02 21:45:35,717 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-02 21:45:35,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.04 09:45:34" (1/3) ... [2023-04-02 21:45:35,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57699d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 09:45:35, skipping insertion in model container [2023-04-02 21:45:35,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.04 09:45:35" (2/3) ... [2023-04-02 21:45:35,718 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@57699d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.04 09:45:35, skipping insertion in model container [2023-04-02 21:45:35,718 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.04 09:45:35" (3/3) ... [2023-04-02 21:45:35,719 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2n_insert_unequal.i [2023-04-02 21:45:35,731 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-02 21:45:35,731 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-02 21:45:35,768 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-02 21:45:35,773 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;@64611e93, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-02 21:45:35,773 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-02 21:45:35,776 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 30 states have internal predecessors, (40), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-02 21:45:35,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-02 21:45:35,782 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:45:35,783 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:45:35,783 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:45:35,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:45:35,788 INFO L85 PathProgramCache]: Analyzing trace with hash -324382985, now seen corresponding path program 1 times [2023-04-02 21:45:35,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:45:35,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578143183] [2023-04-02 21:45:35,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:45:35,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:45:35,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:45:36,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:45:36,225 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:45:36,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578143183] [2023-04-02 21:45:36,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578143183] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:45:36,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-02 21:45:36,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-02 21:45:36,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794179486] [2023-04-02 21:45:36,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:45:36,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-02 21:45:36,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:45:36,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-02 21:45:36,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-02 21:45:36,264 INFO L87 Difference]: Start difference. First operand has 44 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 30 states have internal predecessors, (40), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 5 states, 3 states have (on average 5.0) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-02 21:45:36,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:45:36,480 INFO L93 Difference]: Finished difference Result 81 states and 101 transitions. [2023-04-02 21:45:36,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-02 21:45:36,482 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 5.0) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 24 [2023-04-02 21:45:36,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:45:36,487 INFO L225 Difference]: With dead ends: 81 [2023-04-02 21:45:36,487 INFO L226 Difference]: Without dead ends: 34 [2023-04-02 21:45:36,489 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 [2023-04-02 21:45:36,492 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 21 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-02 21:45:36,492 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 143 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-02 21:45:36,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-02 21:45:36,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2023-04-02 21:45:36,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 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) [2023-04-02 21:45:36,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2023-04-02 21:45:36,518 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 24 [2023-04-02 21:45:36,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:45:36,518 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2023-04-02 21:45:36,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 5.0) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-04-02 21:45:36,519 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2023-04-02 21:45:36,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-04-02 21:45:36,519 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:45:36,519 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:45:36,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-02 21:45:36,520 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:45:36,520 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:45:36,520 INFO L85 PathProgramCache]: Analyzing trace with hash 589633351, now seen corresponding path program 1 times [2023-04-02 21:45:36,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:45:36,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291243609] [2023-04-02 21:45:36,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:45:36,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:45:36,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:45:36,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:45:36,744 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:45:36,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291243609] [2023-04-02 21:45:36,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291243609] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:45:36,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921449139] [2023-04-02 21:45:36,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:45:36,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:45:36,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:45:36,747 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) [2023-04-02 21:45:36,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-02 21:45:36,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:45:36,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 21:45:36,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:45:37,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:45:37,074 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:45:37,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:45:37,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921449139] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:45:37,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1151556657] [2023-04-02 21:45:37,230 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-04-02 21:45:37,230 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:45:37,233 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:45:37,236 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:45:37,237 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:45:37,298 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-02 21:45:37,712 INFO L197 IcfgInterpreter]: Interpreting procedure dll_insert with input of size 42 for LOIs [2023-04-02 21:45:38,003 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 40 for LOIs [2023-04-02 21:45:38,025 INFO L197 IcfgInterpreter]: Interpreting procedure dll_create with input of size 44 for LOIs [2023-04-02 21:45:38,206 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:45:38,210 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:45:39,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1151556657] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-02 21:45:39,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:45:39,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [6, 6, 6] total 31 [2023-04-02 21:45:39,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689063259] [2023-04-02 21:45:39,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-02 21:45:39,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-02 21:45:39,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:45:39,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-02 21:45:39,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2023-04-02 21:45:39,249 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 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) [2023-04-02 21:45:43,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:45:43,673 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2023-04-02 21:45:43,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-04-02 21:45:43,673 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 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) Word has length 27 [2023-04-02 21:45:43,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:45:43,674 INFO L225 Difference]: With dead ends: 43 [2023-04-02 21:45:43,674 INFO L226 Difference]: Without dead ends: 33 [2023-04-02 21:45:43,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=288, Invalid=2162, Unknown=0, NotChecked=0, Total=2450 [2023-04-02 21:45:43,675 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 58 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-04-02 21:45:43,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 6 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-04-02 21:45:43,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-02 21:45:43,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2023-04-02 21:45:43,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 23 states have internal predecessors, (30), 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) [2023-04-02 21:45:43,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2023-04-02 21:45:43,683 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 27 [2023-04-02 21:45:43,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:45:43,683 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2023-04-02 21:45:43,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 12 states have internal predecessors, (18), 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) [2023-04-02 21:45:43,683 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2023-04-02 21:45:43,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-02 21:45:43,684 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:45:43,684 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:45:43,692 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-02 21:45:43,889 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 [2023-04-02 21:45:43,890 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:45:43,890 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:45:43,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1802652024, now seen corresponding path program 1 times [2023-04-02 21:45:43,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:45:43,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029889660] [2023-04-02 21:45:43,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:45:43,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:45:43,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:45:44,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 21:45:44,021 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:45:44,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029889660] [2023-04-02 21:45:44,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029889660] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:45:44,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002975072] [2023-04-02 21:45:44,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:45:44,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:45:44,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:45:44,023 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) [2023-04-02 21:45:44,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-02 21:45:44,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:45:44,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-02 21:45:44,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:45:44,234 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 21:45:44,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-02 21:45:44,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-02 21:45:44,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002975072] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-02 21:45:44,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [439390364] [2023-04-02 21:45:44,303 INFO L159 IcfgInterpreter]: Started Sifa with 27 locations of interest [2023-04-02 21:45:44,303 INFO L166 IcfgInterpreter]: Building call graph [2023-04-02 21:45:44,303 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-02 21:45:44,303 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-02 21:45:44,303 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-02 21:45:44,317 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-02 21:45:44,778 INFO L197 IcfgInterpreter]: Interpreting procedure dll_insert with input of size 42 for LOIs [2023-04-02 21:45:45,013 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 40 for LOIs [2023-04-02 21:45:45,028 INFO L197 IcfgInterpreter]: Interpreting procedure dll_create with input of size 44 for LOIs [2023-04-02 21:45:45,145 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-02 21:45:45,148 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-02 21:45:51,043 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '739#(and (= main_~data~0 1) (= main_~mid_index~0 1) (<= 1 |#StackHeapBarrier|) (= |main_~#s~0.offset| 0) (= main_~count~0 0) (= main_~ptr~0.base (select (select |#memory_$Pointer$.base| |main_~#s~0.base|) 0)) (= main_~len~0 2) (= main_~temp~2.base (select (select |#memory_$Pointer$.base| main_~ptr~0.base) (+ main_~ptr~0.offset 4))) (not (= (select (select |#memory_int| main_~ptr~0.base) main_~ptr~0.offset) 1)) (= |#NULL.offset| 0) (or (not (= main_~ptr~0.offset 0)) (not (= main_~ptr~0.base 0))) (= 5 main_~uneq~0) (= (select (select |#memory_$Pointer$.offset| |main_~#s~0.base|) 0) main_~ptr~0.offset) (<= (+ |#StackHeapBarrier| 1) |main_~#s~0.base|) (= (select (select |#memory_$Pointer$.offset| main_~ptr~0.base) (+ main_~ptr~0.offset 4)) main_~temp~2.offset) (= |#NULL.base| 0))' at error location [2023-04-02 21:45:51,043 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-02 21:45:51,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-02 21:45:51,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-04-02 21:45:51,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43197726] [2023-04-02 21:45:51,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-02 21:45:51,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-02 21:45:51,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-02 21:45:51,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-02 21:45:51,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1119, Unknown=0, NotChecked=0, Total=1260 [2023-04-02 21:45:51,045 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 12 states, 8 states have (on average 4.625) internal successors, (37), 12 states have internal predecessors, (37), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-02 21:45:51,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-02 21:45:51,479 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2023-04-02 21:45:51,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-02 21:45:51,480 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 4.625) internal successors, (37), 12 states have internal predecessors, (37), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 4 states have call successors, (7) Word has length 28 [2023-04-02 21:45:51,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-02 21:45:51,480 INFO L225 Difference]: With dead ends: 60 [2023-04-02 21:45:51,480 INFO L226 Difference]: Without dead ends: 38 [2023-04-02 21:45:51,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=157, Invalid=1249, Unknown=0, NotChecked=0, Total=1406 [2023-04-02 21:45:51,482 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 35 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-02 21:45:51,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 190 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-02 21:45:51,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-04-02 21:45:51,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2023-04-02 21:45:51,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 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) [2023-04-02 21:45:51,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2023-04-02 21:45:51,488 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 28 [2023-04-02 21:45:51,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-02 21:45:51,489 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2023-04-02 21:45:51,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 4.625) internal successors, (37), 12 states have internal predecessors, (37), 4 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 2 states have call predecessors, (7), 4 states have call successors, (7) [2023-04-02 21:45:51,489 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2023-04-02 21:45:51,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-04-02 21:45:51,489 INFO L187 NwaCegarLoop]: Found error trace [2023-04-02 21:45:51,489 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-02 21:45:51,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-02 21:45:51,693 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 [2023-04-02 21:45:51,693 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-02 21:45:51,693 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-02 21:45:51,693 INFO L85 PathProgramCache]: Analyzing trace with hash 80467672, now seen corresponding path program 2 times [2023-04-02 21:45:51,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-02 21:45:51,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079072111] [2023-04-02 21:45:51,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-02 21:45:51,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-02 21:45:51,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-02 21:45:55,875 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-02 21:45:55,876 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-02 21:45:55,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079072111] [2023-04-02 21:45:55,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079072111] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-02 21:45:55,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549241480] [2023-04-02 21:45:55,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-02 21:45:55,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-02 21:45:55,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-02 21:45:55,882 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) [2023-04-02 21:45:55,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-02 21:45:57,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-02 21:45:57,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-02 21:45:57,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 146 conjunts are in the unsatisfiable core [2023-04-02 21:45:57,453 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-02 21:45:57,478 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-02 21:45:57,516 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-04-02 21:45:57,757 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 28 [2023-04-02 21:45:57,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:45:57,764 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-04-02 21:45:57,770 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 21 [2023-04-02 21:45:57,781 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-04-02 21:45:57,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 61 [2023-04-02 21:45:57,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:45:57,791 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2023-04-02 21:45:57,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:45:57,953 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2023-04-02 21:45:57,953 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 38 [2023-04-02 21:45:58,140 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-02 21:45:58,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 43 [2023-04-02 21:45:58,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-02 21:45:58,149 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2023-04-02 21:45:58,154 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2023-04-02 21:45:58,159 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-04-02 21:46:31,763 WARN L223 SmtUtils]: Spent 11.67s on a formula simplification that was a NOOP. DAG size: 171 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)