/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 IntervalDomain -i ../sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:56:40,590 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:56:40,592 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:56:40,628 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:56:40,628 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:56:40,631 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:56:40,634 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:56:40,636 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:56:40,637 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:56:40,641 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:56:40,643 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:56:40,644 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:56:40,644 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:56:40,647 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:56:40,650 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:56:40,651 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:56:40,651 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:56:40,652 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:56:40,654 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:56:40,658 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:56:40,659 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:56:40,660 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:56:40,661 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:56:40,662 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:56:40,670 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:56:40,670 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:56:40,670 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:56:40,671 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:56:40,671 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:56:40,672 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:56:40,672 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:56:40,673 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:56:40,673 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:56:40,674 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:56:40,674 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:56:40,674 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:56:40,675 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:56:40,675 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:56:40,675 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:56:40,676 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:56:40,677 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:56:40,681 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 [2023-03-31 22:56:40,710 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:56:40,710 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:56:40,710 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:56:40,710 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:56:40,711 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:56:40,711 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:56:40,711 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:56:40,711 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:56:40,711 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:56:40,712 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:56:40,712 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:56:40,712 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:56:40,712 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:56:40,713 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:56:40,713 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:56:40,713 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:56:40,713 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:56:40,713 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:56:40,714 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:56:40,714 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:56:40,714 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:56:40,714 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:56:40,714 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:56:40,714 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:56:40,714 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:56:40,715 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:56:40,715 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:56:40,715 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:56:40,715 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:56:40,715 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:56:40,715 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:56:40,715 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:56:40,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:56:40,716 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:56:40,716 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:56:40,716 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:56:40,716 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:56:40,716 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:56:40,716 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:56:40,717 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:56:40,717 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:56:40,717 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:56:40,925 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:56:40,946 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:56:40,950 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:56:40,951 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:56:40,951 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:56:40,952 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i [2023-03-31 22:56:42,068 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:56:42,294 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:56:42,295 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i [2023-03-31 22:56:42,305 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9a864f81/14737aebaa3c44a086d991a9ba214a78/FLAGe3468515d [2023-03-31 22:56:42,315 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d9a864f81/14737aebaa3c44a086d991a9ba214a78 [2023-03-31 22:56:42,317 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:56:42,318 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:56:42,319 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:56:42,319 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:56:42,322 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:56:42,322 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:56:42" (1/1) ... [2023-03-31 22:56:42,323 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ab44265 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:42, skipping insertion in model container [2023-03-31 22:56:42,323 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:56:42" (1/1) ... [2023-03-31 22:56:42,331 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:56:42,357 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:56:42,553 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-ext3-properties/dll_nullified-1.i[24046,24059] [2023-03-31 22:56:42,556 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:56:42,563 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:56:42,600 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-ext3-properties/dll_nullified-1.i[24046,24059] [2023-03-31 22:56:42,601 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:56:42,629 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:56:42,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:42 WrapperNode [2023-03-31 22:56:42,630 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:56:42,631 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:56:42,631 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:56:42,631 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:56:42,639 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:42" (1/1) ... [2023-03-31 22:56:42,640 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:42" (1/1) ... [2023-03-31 22:56:42,663 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:42" (1/1) ... [2023-03-31 22:56:42,663 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:42" (1/1) ... [2023-03-31 22:56:42,677 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:42" (1/1) ... [2023-03-31 22:56:42,683 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:42" (1/1) ... [2023-03-31 22:56:42,686 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:42" (1/1) ... [2023-03-31 22:56:42,688 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:42" (1/1) ... [2023-03-31 22:56:42,698 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:56:42,699 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:56:42,699 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:56:42,699 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:56:42,700 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:42" (1/1) ... [2023-03-31 22:56:42,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:56:42,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:56:42,741 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) [2023-03-31 22:56:42,744 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 [2023-03-31 22:56:42,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:56:42,770 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:56:42,770 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:56:42,770 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2023-03-31 22:56:42,770 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2023-03-31 22:56:42,770 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-03-31 22:56:42,771 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2023-03-31 22:56:42,771 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:56:42,771 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:56:42,771 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:56:42,771 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-31 22:56:42,771 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-31 22:56:42,771 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:56:42,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:56:42,772 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:56:42,772 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2023-03-31 22:56:42,772 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2023-03-31 22:56:42,772 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-03-31 22:56:42,772 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-03-31 22:56:42,772 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-03-31 22:56:42,772 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-03-31 22:56:42,772 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-03-31 22:56:42,772 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-03-31 22:56:42,772 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-03-31 22:56:42,773 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-03-31 22:56:42,773 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-03-31 22:56:42,773 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-03-31 22:56:42,773 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-03-31 22:56:42,773 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-03-31 22:56:42,774 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-03-31 22:56:42,774 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-03-31 22:56:42,775 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-03-31 22:56:42,775 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-03-31 22:56:42,775 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-03-31 22:56:42,775 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-03-31 22:56:42,775 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-03-31 22:56:42,775 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-03-31 22:56:42,775 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-03-31 22:56:42,775 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-03-31 22:56:42,775 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-03-31 22:56:42,775 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-03-31 22:56:42,775 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-03-31 22:56:42,775 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-03-31 22:56:42,775 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-03-31 22:56:42,776 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-03-31 22:56:42,776 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-03-31 22:56:42,776 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-03-31 22:56:42,776 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-03-31 22:56:42,776 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-03-31 22:56:42,776 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-03-31 22:56:42,776 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-03-31 22:56:42,776 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-03-31 22:56:42,777 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-03-31 22:56:42,777 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-03-31 22:56:42,777 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-03-31 22:56:42,777 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-03-31 22:56:42,777 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-03-31 22:56:42,777 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-03-31 22:56:42,777 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-03-31 22:56:42,777 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-03-31 22:56:42,777 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-03-31 22:56:42,778 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-03-31 22:56:42,778 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-03-31 22:56:42,778 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-03-31 22:56:42,778 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-03-31 22:56:42,778 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-03-31 22:56:42,778 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-03-31 22:56:42,778 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-03-31 22:56:42,778 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-03-31 22:56:42,778 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-03-31 22:56:42,778 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-03-31 22:56:42,779 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-03-31 22:56:42,779 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-03-31 22:56:42,779 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-03-31 22:56:42,779 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-03-31 22:56:42,779 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2023-03-31 22:56:42,779 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-03-31 22:56:42,779 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2023-03-31 22:56:42,779 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-03-31 22:56:42,779 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:56:42,779 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2023-03-31 22:56:42,779 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-03-31 22:56:42,780 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-03-31 22:56:42,780 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-03-31 22:56:42,780 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-03-31 22:56:42,780 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-03-31 22:56:42,780 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-03-31 22:56:42,780 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-03-31 22:56:42,780 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-03-31 22:56:42,780 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-03-31 22:56:42,780 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-03-31 22:56:42,780 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-03-31 22:56:42,781 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-03-31 22:56:42,781 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-03-31 22:56:42,781 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-03-31 22:56:42,781 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-03-31 22:56:42,781 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-03-31 22:56:42,781 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-03-31 22:56:42,781 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-03-31 22:56:42,781 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-03-31 22:56:42,781 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-03-31 22:56:42,781 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-03-31 22:56:42,782 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-03-31 22:56:42,782 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-03-31 22:56:42,782 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-03-31 22:56:42,782 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-03-31 22:56:42,782 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-03-31 22:56:42,782 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-03-31 22:56:42,782 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-03-31 22:56:42,782 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-03-31 22:56:42,782 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-03-31 22:56:42,782 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-03-31 22:56:42,783 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-03-31 22:56:42,783 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-03-31 22:56:42,783 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-03-31 22:56:42,783 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-03-31 22:56:42,783 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-03-31 22:56:42,783 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-03-31 22:56:42,783 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-03-31 22:56:42,783 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-03-31 22:56:42,783 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2023-03-31 22:56:42,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-31 22:56:42,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:56:42,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-03-31 22:56:42,784 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:56:42,784 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-03-31 22:56:42,784 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:56:42,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:56:42,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:56:42,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:56:42,784 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:56:43,056 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:56:43,059 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:56:43,111 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-03-31 22:56:43,284 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:56:43,399 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:56:43,399 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-03-31 22:56:43,401 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:56:43 BoogieIcfgContainer [2023-03-31 22:56:43,402 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:56:43,403 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:56:43,403 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:56:43,406 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:56:43,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:56:42" (1/3) ... [2023-03-31 22:56:43,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ecc72ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:56:43, skipping insertion in model container [2023-03-31 22:56:43,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:42" (2/3) ... [2023-03-31 22:56:43,407 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ecc72ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:56:43, skipping insertion in model container [2023-03-31 22:56:43,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:56:43" (3/3) ... [2023-03-31 22:56:43,408 INFO L112 eAbstractionObserver]: Analyzing ICFG dll_nullified-1.i [2023-03-31 22:56:43,425 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:56:43,425 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:56:43,474 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:56:43,480 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;@66534fb4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:56:43,481 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:56:43,484 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 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) [2023-03-31 22:56:43,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-03-31 22:56:43,491 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:56:43,492 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:56:43,494 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:56:43,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:56:43,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1790686237, now seen corresponding path program 1 times [2023-03-31 22:56:43,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:56:43,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753008017] [2023-03-31 22:56:43,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:56:43,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:56:43,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:56:43,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:56:43,679 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:56:43,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753008017] [2023-03-31 22:56:43,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753008017] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:56:43,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:56:43,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-03-31 22:56:43,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691365951] [2023-03-31 22:56:43,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:56:43,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-03-31 22:56:43,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:56:43,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-03-31 22:56:43,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 22:56:43,726 INFO L87 Difference]: Start difference. First operand has 26 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 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) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 22:56:43,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:56:43,774 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2023-03-31 22:56:43,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-03-31 22:56:43,777 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2023-03-31 22:56:43,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:56:43,784 INFO L225 Difference]: With dead ends: 34 [2023-03-31 22:56:43,784 INFO L226 Difference]: Without dead ends: 19 [2023-03-31 22:56:43,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 22:56:43,791 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:56:43,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 22:56:43,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-03-31 22:56:43,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-03-31 22:56:43,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 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) [2023-03-31 22:56:43,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2023-03-31 22:56:43,818 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 14 [2023-03-31 22:56:43,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:56:43,819 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2023-03-31 22:56:43,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-03-31 22:56:43,821 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2023-03-31 22:56:43,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-03-31 22:56:43,821 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:56:43,822 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:56:43,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:56:43,822 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:56:43,823 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:56:43,823 INFO L85 PathProgramCache]: Analyzing trace with hash -1791429028, now seen corresponding path program 1 times [2023-03-31 22:56:43,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:56:43,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350154696] [2023-03-31 22:56:43,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:56:43,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:56:43,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:56:43,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:56:43,941 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:56:43,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350154696] [2023-03-31 22:56:43,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350154696] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:56:43,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:56:43,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:56:43,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482147021] [2023-03-31 22:56:43,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:56:43,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:56:43,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:56:43,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:56:43,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:56:43,944 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 5 states, 3 states have (on average 3.0) internal successors, (9), 5 states have internal predecessors, (9), 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) [2023-03-31 22:56:44,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:56:44,056 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2023-03-31 22:56:44,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 22:56:44,057 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 3.0) internal successors, (9), 5 states have internal predecessors, (9), 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 14 [2023-03-31 22:56:44,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:56:44,057 INFO L225 Difference]: With dead ends: 31 [2023-03-31 22:56:44,058 INFO L226 Difference]: Without dead ends: 22 [2023-03-31 22:56:44,058 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 [2023-03-31 22:56:44,059 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 13 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:56:44,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 49 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 22:56:44,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-03-31 22:56:44,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2023-03-31 22:56:44,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 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) [2023-03-31 22:56:44,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2023-03-31 22:56:44,069 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2023-03-31 22:56:44,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:56:44,070 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2023-03-31 22:56:44,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 3.0) internal successors, (9), 5 states have internal predecessors, (9), 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) [2023-03-31 22:56:44,070 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2023-03-31 22:56:44,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-03-31 22:56:44,071 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:56:44,071 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:56:44,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:56:44,071 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:56:44,085 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:56:44,089 INFO L85 PathProgramCache]: Analyzing trace with hash 2029725503, now seen corresponding path program 1 times [2023-03-31 22:56:44,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:56:44,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122237154] [2023-03-31 22:56:44,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:56:44,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:56:44,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:56:44,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:56:44,312 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:56:44,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122237154] [2023-03-31 22:56:44,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122237154] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:56:44,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294926604] [2023-03-31 22:56:44,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:56:44,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:56:44,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:56:44,318 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) [2023-03-31 22:56:44,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 22:56:44,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:56:44,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 5 conjunts are in the unsatisfiable core [2023-03-31 22:56:44,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:56:44,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:56:44,568 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:56:44,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:56:44,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294926604] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:56:44,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1551432747] [2023-03-31 22:56:44,703 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-03-31 22:56:44,703 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:56:44,706 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:56:44,710 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:56:44,710 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:56:44,794 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 23 for LOIs [2023-03-31 22:56:45,217 INFO L197 IcfgInterpreter]: Interpreting procedure dll_create with input of size 26 for LOIs [2023-03-31 22:56:45,510 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 22:56:45,515 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:56:45,877 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '300#(and (= 5 main_~len~0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 22:56:45,877 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:56:45,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 22:56:45,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2023-03-31 22:56:45,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361027860] [2023-03-31 22:56:45,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 22:56:45,878 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-31 22:56:45,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:56:45,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-31 22:56:45,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=348, Unknown=0, NotChecked=0, Total=420 [2023-03-31 22:56:45,880 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 9 states, 6 states have (on average 3.0) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:56:46,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:56:46,062 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2023-03-31 22:56:46,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:56:46,063 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 3.0) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 17 [2023-03-31 22:56:46,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:56:46,063 INFO L225 Difference]: With dead ends: 34 [2023-03-31 22:56:46,064 INFO L226 Difference]: Without dead ends: 25 [2023-03-31 22:56:46,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2023-03-31 22:56:46,065 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 22:56:46,066 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 43 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 22:56:46,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-03-31 22:56:46,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2023-03-31 22:56:46,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 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) [2023-03-31 22:56:46,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-03-31 22:56:46,070 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 17 [2023-03-31 22:56:46,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:56:46,070 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-03-31 22:56:46,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 3.0) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:56:46,070 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-03-31 22:56:46,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-03-31 22:56:46,071 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:56:46,071 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:56:46,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 22:56:46,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:56:46,284 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:56:46,284 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:56:46,284 INFO L85 PathProgramCache]: Analyzing trace with hash -63821956, now seen corresponding path program 2 times [2023-03-31 22:56:46,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:56:46,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833102748] [2023-03-31 22:56:46,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:56:46,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:56:46,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:56:46,499 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:56:46,500 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:56:46,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833102748] [2023-03-31 22:56:46,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833102748] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:56:46,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139539561] [2023-03-31 22:56:46,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 22:56:46,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:56:46,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:56:46,507 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) [2023-03-31 22:56:46,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 22:56:46,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-03-31 22:56:46,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 22:56:46,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 6 conjunts are in the unsatisfiable core [2023-03-31 22:56:46,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:56:46,751 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:56:46,751 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:56:46,863 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:56:46,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139539561] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:56:46,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1853368244] [2023-03-31 22:56:46,866 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-03-31 22:56:46,866 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:56:46,866 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:56:46,866 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:56:46,866 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:56:46,885 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 23 for LOIs [2023-03-31 22:56:47,122 INFO L197 IcfgInterpreter]: Interpreting procedure dll_create with input of size 26 for LOIs [2023-03-31 22:56:47,320 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 22:56:47,323 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:56:47,660 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '526#(and (= 5 main_~len~0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 22:56:47,661 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:56:47,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 22:56:47,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-03-31 22:56:47,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281567140] [2023-03-31 22:56:47,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 22:56:47,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-03-31 22:56:47,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:56:47,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-03-31 22:56:47,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2023-03-31 22:56:47,663 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 11 states, 8 states have (on average 3.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:56:47,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:56:47,852 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2023-03-31 22:56:47,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-03-31 22:56:47,853 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 3.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 20 [2023-03-31 22:56:47,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:56:47,853 INFO L225 Difference]: With dead ends: 37 [2023-03-31 22:56:47,853 INFO L226 Difference]: Without dead ends: 28 [2023-03-31 22:56:47,854 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2023-03-31 22:56:47,855 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 16 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 22:56:47,855 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 56 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 22:56:47,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-03-31 22:56:47,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2023-03-31 22:56:47,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 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) [2023-03-31 22:56:47,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2023-03-31 22:56:47,859 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 20 [2023-03-31 22:56:47,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:56:47,859 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2023-03-31 22:56:47,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 3.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:56:47,859 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2023-03-31 22:56:47,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-03-31 22:56:47,860 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:56:47,860 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:56:47,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 22:56:48,067 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,SelfDestructingSolverStorable3 [2023-03-31 22:56:48,067 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:56:48,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:56:48,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1716067809, now seen corresponding path program 3 times [2023-03-31 22:56:48,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:56:48,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542493940] [2023-03-31 22:56:48,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:56:48,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:56:48,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:56:48,251 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:56:48,251 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:56:48,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542493940] [2023-03-31 22:56:48,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542493940] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:56:48,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503317980] [2023-03-31 22:56:48,261 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 22:56:48,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:56:48,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:56:48,265 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) [2023-03-31 22:56:48,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 22:56:48,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 22:56:48,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 22:56:48,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 7 conjunts are in the unsatisfiable core [2023-03-31 22:56:48,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:56:48,513 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:56:48,514 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:56:48,636 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:56:48,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503317980] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:56:48,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1530362773] [2023-03-31 22:56:48,639 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-03-31 22:56:48,639 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:56:48,639 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:56:48,639 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:56:48,639 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:56:48,655 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 23 for LOIs [2023-03-31 22:56:48,848 INFO L197 IcfgInterpreter]: Interpreting procedure dll_create with input of size 26 for LOIs [2023-03-31 22:56:49,031 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 22:56:49,034 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:56:49,334 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '780#(and (= 5 main_~len~0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 22:56:49,334 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:56:49,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 22:56:49,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2023-03-31 22:56:49,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946985361] [2023-03-31 22:56:49,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 22:56:49,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-03-31 22:56:49,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:56:49,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-03-31 22:56:49,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2023-03-31 22:56:49,336 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 13 states, 10 states have (on average 3.0) internal successors, (30), 13 states have internal predecessors, (30), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:56:49,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:56:49,708 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2023-03-31 22:56:49,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 22:56:49,708 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 3.0) internal successors, (30), 13 states have internal predecessors, (30), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 23 [2023-03-31 22:56:49,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:56:49,709 INFO L225 Difference]: With dead ends: 40 [2023-03-31 22:56:49,709 INFO L226 Difference]: Without dead ends: 31 [2023-03-31 22:56:49,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2023-03-31 22:56:49,710 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-03-31 22:56:49,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 72 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-03-31 22:56:49,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-03-31 22:56:49,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-03-31 22:56:49,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 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) [2023-03-31 22:56:49,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2023-03-31 22:56:49,714 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 23 [2023-03-31 22:56:49,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:56:49,715 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2023-03-31 22:56:49,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 3.0) internal successors, (30), 13 states have internal predecessors, (30), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-03-31 22:56:49,715 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2023-03-31 22:56:49,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-03-31 22:56:49,716 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:56:49,716 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:56:49,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 22:56:49,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:56:49,923 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:56:49,924 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:56:49,924 INFO L85 PathProgramCache]: Analyzing trace with hash 847904924, now seen corresponding path program 4 times [2023-03-31 22:56:49,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:56:49,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879303051] [2023-03-31 22:56:49,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:56:49,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:56:49,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:56:50,134 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:56:50,134 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:56:50,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879303051] [2023-03-31 22:56:50,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879303051] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:56:50,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27098001] [2023-03-31 22:56:50,134 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 22:56:50,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:56:50,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:56:50,136 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) [2023-03-31 22:56:50,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 22:56:50,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:56:50,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 8 conjunts are in the unsatisfiable core [2023-03-31 22:56:50,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:56:50,387 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:56:50,388 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:56:50,536 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:56:50,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27098001] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:56:50,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [834459529] [2023-03-31 22:56:50,538 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-03-31 22:56:50,538 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:56:50,539 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:56:50,539 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:56:50,539 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:56:50,554 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 23 for LOIs [2023-03-31 22:56:50,763 INFO L197 IcfgInterpreter]: Interpreting procedure dll_create with input of size 26 for LOIs [2023-03-31 22:56:50,924 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 22:56:50,927 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:56:51,248 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1061#(and (= 5 main_~len~0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 22:56:51,248 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:56:51,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 22:56:51,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-03-31 22:56:51,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750801491] [2023-03-31 22:56:51,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 22:56:51,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-03-31 22:56:51,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:56:51,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-03-31 22:56:51,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2023-03-31 22:56:51,250 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 14 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 14 states have internal predecessors, (35), 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) [2023-03-31 22:56:51,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:56:51,571 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2023-03-31 22:56:51,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-31 22:56:51,572 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 14 states have internal predecessors, (35), 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 26 [2023-03-31 22:56:51,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:56:51,573 INFO L225 Difference]: With dead ends: 43 [2023-03-31 22:56:51,573 INFO L226 Difference]: Without dead ends: 34 [2023-03-31 22:56:51,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2023-03-31 22:56:51,574 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 16 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:56:51,574 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 68 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 22:56:51,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-03-31 22:56:51,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2023-03-31 22:56:51,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 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) [2023-03-31 22:56:51,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2023-03-31 22:56:51,578 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 26 [2023-03-31 22:56:51,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:56:51,579 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2023-03-31 22:56:51,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 14 states have internal predecessors, (35), 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) [2023-03-31 22:56:51,579 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2023-03-31 22:56:51,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-03-31 22:56:51,579 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:56:51,580 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:56:51,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 22:56:51,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:56:51,789 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:56:51,790 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:56:51,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1833765633, now seen corresponding path program 5 times [2023-03-31 22:56:51,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:56:51,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500176648] [2023-03-31 22:56:51,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:56:51,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:56:52,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-03-31 22:56:52,033 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-03-31 22:56:52,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-03-31 22:56:52,209 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-03-31 22:56:52,209 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-03-31 22:56:52,210 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-03-31 22:56:52,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-03-31 22:56:52,217 INFO L445 BasicCegarLoop]: Path program histogram: [5, 1, 1] [2023-03-31 22:56:52,220 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-03-31 22:56:52,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.03 10:56:52 BoogieIcfgContainer [2023-03-31 22:56:52,252 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-03-31 22:56:52,252 INFO L158 Benchmark]: Toolchain (without parser) took 9934.24ms. Allocated memory was 312.5MB in the beginning and 450.9MB in the end (delta: 138.4MB). Free memory was 264.1MB in the beginning and 309.7MB in the end (delta: -45.6MB). Peak memory consumption was 94.4MB. Max. memory is 8.0GB. [2023-03-31 22:56:52,253 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 190.8MB. Free memory is still 142.2MB. There was no memory consumed. Max. memory is 8.0GB. [2023-03-31 22:56:52,253 INFO L158 Benchmark]: CACSL2BoogieTranslator took 310.99ms. Allocated memory is still 312.5MB. Free memory was 264.1MB in the beginning and 246.8MB in the end (delta: 17.3MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. [2023-03-31 22:56:52,253 INFO L158 Benchmark]: Boogie Preprocessor took 67.82ms. Allocated memory is still 312.5MB. Free memory was 246.8MB in the beginning and 244.2MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-03-31 22:56:52,253 INFO L158 Benchmark]: RCFGBuilder took 702.42ms. Allocated memory is still 312.5MB. Free memory was 244.2MB in the beginning and 215.3MB in the end (delta: 28.9MB). Peak memory consumption was 29.4MB. Max. memory is 8.0GB. [2023-03-31 22:56:52,253 INFO L158 Benchmark]: TraceAbstraction took 8848.78ms. Allocated memory was 312.5MB in the beginning and 450.9MB in the end (delta: 138.4MB). Free memory was 214.8MB in the beginning and 309.7MB in the end (delta: -94.8MB). Peak memory consumption was 45.1MB. Max. memory is 8.0GB. [2023-03-31 22:56:52,255 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 190.8MB. Free memory is still 142.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 310.99ms. Allocated memory is still 312.5MB. Free memory was 264.1MB in the beginning and 246.8MB in the end (delta: 17.3MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 67.82ms. Allocated memory is still 312.5MB. Free memory was 246.8MB in the beginning and 244.2MB in the end (delta: 2.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 702.42ms. Allocated memory is still 312.5MB. Free memory was 244.2MB in the beginning and 215.3MB in the end (delta: 28.9MB). Peak memory consumption was 29.4MB. Max. memory is 8.0GB. * TraceAbstraction took 8848.78ms. Allocated memory was 312.5MB in the beginning and 450.9MB in the end (delta: 138.4MB). Free memory was 214.8MB in the beginning and 309.7MB in the end (delta: -94.8MB). Peak memory consumption was 45.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 616]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L599] const int len = 5; VAL [len=5] [L600] CALL, EXPR dll_create(len) VAL [\old(len)=5] [L579] DLL head = ((void *)0); VAL [\old(len)=5, head={0:0}, len=5] [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={0:0}, len=5, new_head={-1:0}] [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND FALSE !(\read(head)) [L593] head = new_head [L594] len-- VAL [\old(len)=5, head={-1:0}, len=4, new_head={-1:0}] [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={-1:0}, len=4, new_head={-2:0}] [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- VAL [\old(len)=5, head={-2:0}, len=3, new_head={-2:0}] [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={-2:0}, len=3, new_head={-3:0}] [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- VAL [\old(len)=5, head={-3:0}, len=2, new_head={-3:0}] [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={-3:0}, len=2, new_head={-4:0}] [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- VAL [\old(len)=5, head={-4:0}, len=1, new_head={-4:0}] [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) VAL [\old(len)=5, head={-4:0}, len=1, new_head={-5:0}] [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- VAL [\old(len)=5, head={-5:0}, len=0, new_head={-5:0}] [L580] COND FALSE !(len > 0) [L596] return head; [L600] RET, EXPR dll_create(len) VAL [dll_create(len)={-5:0}, len=5] [L600] DLL head = dll_create(len); [L601] head->next VAL [head->next={-4:0}, head={-5:0}, len=5] [L601] COND TRUE head->next [L602] EXPR head->data_0 [L602] EXPR 0 != head->data_0 || 0 != head->data_1 [L602] EXPR head->data_1 [L602] EXPR 0 != head->data_0 || 0 != head->data_1 [L602] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L602] EXPR head->data_2 [L602] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 VAL [0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2=1, 0 != head->data_0 || 0 != head->data_1=0, head->data_0=0, head->data_1=0, head->data_2=1, head={-5:0}, len=5] [L602] COND TRUE 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L616] reach_error() VAL [head={-5:0}, len=5] - StatisticsResult: Ultimate Automizer benchmark data CFG has 8 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8.8s, OverallIterations: 7, TraceHistogramMax: 5, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 80 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 75 mSDsluCounter, 312 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 208 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 190 IncrementalHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 104 mSDtfsCounter, 190 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 296 GetRequests, 196 SyntacticMatches, 5 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=6, InterpolantAutomatonStates: 41, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 6 MinimizatonAttempts, 10 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 229 NumberOfCodeBlocks, 229 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 272 ConstructedInterpolants, 0 QuantifiedInterpolants, 754 SizeOfPredicates, 4 NumberOfNonLiveVariables, 1352 ConjunctsInSsa, 26 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 0/120 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-03-31 22:56:52,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...