/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain OctagonDomain -i ../sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:57:04,113 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:57:04,114 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:57:04,139 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:57:04,139 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:57:04,142 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:57:04,145 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:57:04,147 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:57:04,150 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:57:04,156 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:57:04,157 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:57:04,158 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:57:04,159 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:57:04,161 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:57:04,162 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:57:04,165 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:57:04,166 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:57:04,166 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:57:04,167 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:57:04,168 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:57:04,169 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:57:04,179 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:57:04,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:57:04,180 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:57:04,183 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:57:04,183 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:57:04,183 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:57:04,184 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:57:04,184 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:57:04,184 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:57:04,185 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:57:04,185 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:57:04,185 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:57:04,186 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:57:04,186 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:57:04,187 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:57:04,187 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:57:04,187 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:57:04,187 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:57:04,188 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:57:04,188 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:57:04,194 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 04:57:04,232 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:57:04,232 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:57:04,232 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:57:04,232 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:57:04,233 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:57:04,233 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:57:04,233 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:57:04,233 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:57:04,233 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:57:04,233 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:57:04,233 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:57:04,233 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:57:04,233 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:57:04,234 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:57:04,234 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:57:04,234 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:57:04,234 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:57:04,234 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:57:04,234 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:57:04,234 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:57:04,235 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:57:04,235 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:57:04,235 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:57:04,235 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:57:04,235 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:57:04,235 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:57:04,235 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:57:04,235 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:57:04,235 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:57:04,235 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:57:04,235 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:57:04,235 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:57:04,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:57:04,236 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:57:04,236 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:57:04,236 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:57:04,236 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:57:04,236 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:57:04,236 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:57:04,236 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:57:04,236 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:57:04,236 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:57:04,452 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:57:04,476 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:57:04,478 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:57:04,479 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:57:04,479 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:57:04,480 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i [2023-04-01 04:57:05,615 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:57:05,864 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:57:05,864 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i [2023-04-01 04:57:05,877 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ab8e4509/8eb28181cd7a424eb83967ab66d79cd8/FLAG664551477 [2023-04-01 04:57:05,893 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ab8e4509/8eb28181cd7a424eb83967ab66d79cd8 [2023-04-01 04:57:05,896 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:57:05,897 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:57:05,899 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:57:05,899 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:57:05,901 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:57:05,902 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:57:05" (1/1) ... [2023-04-01 04:57:05,903 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76d9d982 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:05, skipping insertion in model container [2023-04-01 04:57:05,903 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:57:05" (1/1) ... [2023-04-01 04:57:05,908 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:57:05,942 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:57:06,118 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] [2023-04-01 04:57:06,121 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:57:06,127 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:57:06,151 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] [2023-04-01 04:57:06,151 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:57:06,168 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:57:06,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:06 WrapperNode [2023-04-01 04:57:06,169 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:57:06,170 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:57:06,170 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:57:06,170 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:57:06,176 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:06" (1/1) ... [2023-04-01 04:57:06,176 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:06" (1/1) ... [2023-04-01 04:57:06,185 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:06" (1/1) ... [2023-04-01 04:57:06,185 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:06" (1/1) ... [2023-04-01 04:57:06,193 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:06" (1/1) ... [2023-04-01 04:57:06,195 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:06" (1/1) ... [2023-04-01 04:57:06,197 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:06" (1/1) ... [2023-04-01 04:57:06,198 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:06" (1/1) ... [2023-04-01 04:57:06,201 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:57:06,202 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:57:06,202 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:57:06,202 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:57:06,202 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:06" (1/1) ... [2023-04-01 04:57:06,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:57:06,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:57:06,229 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 04:57:06,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 04:57:06,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:57:06,292 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:57:06,292 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:57:06,292 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2023-04-01 04:57:06,292 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2023-04-01 04:57:06,292 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-04-01 04:57:06,292 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2023-04-01 04:57:06,292 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:57:06,292 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:57:06,293 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:57:06,293 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 04:57:06,293 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 04:57:06,293 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:57:06,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:57:06,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-04-01 04:57:06,293 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2023-04-01 04:57:06,293 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2023-04-01 04:57:06,293 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-04-01 04:57:06,293 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-04-01 04:57:06,293 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-04-01 04:57:06,294 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-04-01 04:57:06,294 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-04-01 04:57:06,294 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-04-01 04:57:06,294 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-04-01 04:57:06,294 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-04-01 04:57:06,294 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-04-01 04:57:06,294 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-04-01 04:57:06,294 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-04-01 04:57:06,294 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-04-01 04:57:06,294 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-04-01 04:57:06,294 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-04-01 04:57:06,294 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-04-01 04:57:06,294 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-04-01 04:57:06,294 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-04-01 04:57:06,295 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-04-01 04:57:06,295 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-04-01 04:57:06,295 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-04-01 04:57:06,295 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-04-01 04:57:06,295 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-04-01 04:57:06,295 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-04-01 04:57:06,295 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-04-01 04:57:06,295 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-04-01 04:57:06,295 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-04-01 04:57:06,295 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-04-01 04:57:06,295 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-04-01 04:57:06,295 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-04-01 04:57:06,295 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-04-01 04:57:06,296 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-04-01 04:57:06,296 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-04-01 04:57:06,296 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-04-01 04:57:06,296 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-04-01 04:57:06,296 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-04-01 04:57:06,296 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-04-01 04:57:06,296 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-04-01 04:57:06,296 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-04-01 04:57:06,296 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-04-01 04:57:06,296 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-04-01 04:57:06,296 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-04-01 04:57:06,296 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-04-01 04:57:06,296 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-04-01 04:57:06,296 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-04-01 04:57:06,297 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-04-01 04:57:06,297 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-04-01 04:57:06,297 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-04-01 04:57:06,297 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-04-01 04:57:06,297 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-04-01 04:57:06,297 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-04-01 04:57:06,313 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 04:57:06,313 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-04-01 04:57:06,313 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-04-01 04:57:06,313 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 04:57:06,313 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-04-01 04:57:06,313 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-04-01 04:57:06,313 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-04-01 04:57:06,314 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-04-01 04:57:06,314 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2023-04-01 04:57:06,314 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-04-01 04:57:06,314 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2023-04-01 04:57:06,314 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-04-01 04:57:06,314 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:57:06,314 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2023-04-01 04:57:06,314 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-04-01 04:57:06,315 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-04-01 04:57:06,315 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-04-01 04:57:06,315 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-04-01 04:57:06,315 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-04-01 04:57:06,315 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-04-01 04:57:06,315 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-04-01 04:57:06,315 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-04-01 04:57:06,315 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-04-01 04:57:06,315 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-04-01 04:57:06,315 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-04-01 04:57:06,315 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-04-01 04:57:06,316 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-04-01 04:57:06,316 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-04-01 04:57:06,316 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-04-01 04:57:06,316 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-04-01 04:57:06,316 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-04-01 04:57:06,316 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-04-01 04:57:06,316 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-04-01 04:57:06,316 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-04-01 04:57:06,316 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-04-01 04:57:06,316 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-04-01 04:57:06,316 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-04-01 04:57:06,316 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-04-01 04:57:06,316 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-04-01 04:57:06,317 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-04-01 04:57:06,317 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-04-01 04:57:06,317 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-04-01 04:57:06,317 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-04-01 04:57:06,317 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-04-01 04:57:06,317 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-04-01 04:57:06,317 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-04-01 04:57:06,317 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-04-01 04:57:06,317 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-04-01 04:57:06,318 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-04-01 04:57:06,318 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-04-01 04:57:06,319 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-04-01 04:57:06,319 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-04-01 04:57:06,319 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-04-01 04:57:06,319 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2023-04-01 04:57:06,320 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 04:57:06,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:57:06,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 04:57:06,325 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:57:06,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 04:57:06,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:57:06,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:57:06,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:57:06,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:57:06,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:57:06,555 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:57:06,556 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:57:06,618 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-04-01 04:57:06,785 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:57:06,875 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:57:06,875 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 04:57:06,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:57:06 BoogieIcfgContainer [2023-04-01 04:57:06,880 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:57:06,883 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:57:06,883 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:57:06,885 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:57:06,885 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:57:05" (1/3) ... [2023-04-01 04:57:06,886 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68dcdbdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:57:06, skipping insertion in model container [2023-04-01 04:57:06,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:57:06" (2/3) ... [2023-04-01 04:57:06,886 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68dcdbdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:57:06, skipping insertion in model container [2023-04-01 04:57:06,886 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:57:06" (3/3) ... [2023-04-01 04:57:06,887 INFO L112 eAbstractionObserver]: Analyzing ICFG dll_nullified-1.i [2023-04-01 04:57:06,899 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:57:06,899 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:57:06,941 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:57:06,946 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;@224654aa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:57:06,947 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:57:06,949 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) [2023-04-01 04:57:06,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 04:57:06,955 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:57:06,955 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:57:06,956 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:57:06,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:57:06,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1790686237, now seen corresponding path program 1 times [2023-04-01 04:57:06,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:57:06,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571949899] [2023-04-01 04:57:06,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:57:06,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:57:07,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:57:07,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:57:07,112 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:57:07,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571949899] [2023-04-01 04:57:07,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571949899] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:57:07,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:57:07,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 04:57:07,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749947941] [2023-04-01 04:57:07,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:57:07,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 04:57:07,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:57:07,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 04:57:07,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 04:57:07,159 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) [2023-04-01 04:57:07,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:57:07,196 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2023-04-01 04:57:07,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 04:57:07,198 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 [2023-04-01 04:57:07,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:57:07,203 INFO L225 Difference]: With dead ends: 34 [2023-04-01 04:57:07,203 INFO L226 Difference]: Without dead ends: 19 [2023-04-01 04:57:07,206 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 [2023-04-01 04:57:07,210 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 [2023-04-01 04:57:07,211 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] [2023-04-01 04:57:07,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-04-01 04:57:07,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-04-01 04:57:07,232 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) [2023-04-01 04:57:07,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2023-04-01 04:57:07,235 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 14 [2023-04-01 04:57:07,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:57:07,235 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2023-04-01 04:57:07,236 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) [2023-04-01 04:57:07,237 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2023-04-01 04:57:07,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 04:57:07,237 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:57:07,237 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:57:07,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:57:07,238 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:57:07,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:57:07,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1791429028, now seen corresponding path program 1 times [2023-04-01 04:57:07,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:57:07,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511095859] [2023-04-01 04:57:07,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:57:07,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:57:07,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:57:07,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:57:07,340 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:57:07,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511095859] [2023-04-01 04:57:07,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511095859] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:57:07,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:57:07,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:57:07,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177240803] [2023-04-01 04:57:07,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:57:07,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:57:07,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:57:07,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:57:07,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:57:07,344 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) [2023-04-01 04:57:07,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:57:07,446 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2023-04-01 04:57:07,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 04:57:07,447 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 [2023-04-01 04:57:07,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:57:07,447 INFO L225 Difference]: With dead ends: 31 [2023-04-01 04:57:07,447 INFO L226 Difference]: Without dead ends: 22 [2023-04-01 04:57:07,447 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 04:57:07,448 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 [2023-04-01 04:57:07,449 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] [2023-04-01 04:57:07,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-01 04:57:07,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2023-04-01 04:57:07,452 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) [2023-04-01 04:57:07,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2023-04-01 04:57:07,452 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2023-04-01 04:57:07,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:57:07,452 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2023-04-01 04:57:07,453 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) [2023-04-01 04:57:07,453 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2023-04-01 04:57:07,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 04:57:07,453 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:57:07,453 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:57:07,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 04:57:07,453 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:57:07,454 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:57:07,454 INFO L85 PathProgramCache]: Analyzing trace with hash 2029725503, now seen corresponding path program 1 times [2023-04-01 04:57:07,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:57:07,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962593677] [2023-04-01 04:57:07,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:57:07,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:57:07,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:57:07,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:57:07,592 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:57:07,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962593677] [2023-04-01 04:57:07,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962593677] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:57:07,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9823163] [2023-04-01 04:57:07,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:57:07,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:57:07,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:57:07,595 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:57:07,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 04:57:07,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:57:07,761 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 04:57:07,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:57:07,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:57:07,794 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:57:07,861 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:57:07,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9823163] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:57:07,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [823767021] [2023-04-01 04:57:07,874 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 04:57:07,874 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:57:07,876 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:57:07,880 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:57:07,880 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:57:07,923 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:57:08,312 INFO L197 IcfgInterpreter]: Interpreting procedure dll_create with input of size 27 for LOIs [2023-04-01 04:57:08,536 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:57:08,539 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:57:08,944 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '300#(and (<= 1 |#StackHeapBarrier|) (= 5 main_~len~0) (= |#NULL.offset| 0) (= 0 main_~head~1.offset) (= |#NULL.base| 0) (<= (+ main_~head~1.base 1) |#StackHeapBarrier|))' at error location [2023-04-01 04:57:08,944 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:57:08,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:57:08,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2023-04-01 04:57:08,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120000484] [2023-04-01 04:57:08,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:57:08,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 04:57:08,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:57:08,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 04:57:08,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2023-04-01 04:57:08,946 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) [2023-04-01 04:57:09,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:57:09,129 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2023-04-01 04:57:09,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:57:09,129 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 [2023-04-01 04:57:09,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:57:09,130 INFO L225 Difference]: With dead ends: 34 [2023-04-01 04:57:09,130 INFO L226 Difference]: Without dead ends: 25 [2023-04-01 04:57:09,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2023-04-01 04:57:09,131 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 [2023-04-01 04:57:09,132 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] [2023-04-01 04:57:09,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-01 04:57:09,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2023-04-01 04:57:09,135 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) [2023-04-01 04:57:09,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-04-01 04:57:09,135 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 17 [2023-04-01 04:57:09,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:57:09,135 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-04-01 04:57:09,135 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) [2023-04-01 04:57:09,135 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-04-01 04:57:09,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 04:57:09,136 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:57:09,136 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:57:09,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-04-01 04:57:09,336 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 [2023-04-01 04:57:09,337 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:57:09,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:57:09,337 INFO L85 PathProgramCache]: Analyzing trace with hash -63821956, now seen corresponding path program 2 times [2023-04-01 04:57:09,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:57:09,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504534080] [2023-04-01 04:57:09,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:57:09,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:57:09,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:57:09,570 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:57:09,571 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:57:09,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504534080] [2023-04-01 04:57:09,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504534080] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:57:09,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602514219] [2023-04-01 04:57:09,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 04:57:09,573 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:57:09,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:57:09,609 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:57:09,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 04:57:09,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 04:57:09,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 04:57:09,802 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 04:57:09,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:57:09,821 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:57:09,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:57:09,908 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:57:09,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602514219] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:57:09,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1419146657] [2023-04-01 04:57:09,910 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 04:57:09,911 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:57:09,911 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:57:09,911 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:57:09,911 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:57:09,930 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:57:10,128 INFO L197 IcfgInterpreter]: Interpreting procedure dll_create with input of size 27 for LOIs [2023-04-01 04:57:10,315 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:57:10,318 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:57:10,694 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '527#(and (<= 1 |#StackHeapBarrier|) (= 5 main_~len~0) (= |#NULL.offset| 0) (= 0 main_~head~1.offset) (= |#NULL.base| 0) (<= (+ main_~head~1.base 1) |#StackHeapBarrier|))' at error location [2023-04-01 04:57:10,694 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:57:10,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:57:10,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-04-01 04:57:10,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461470929] [2023-04-01 04:57:10,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:57:10,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 04:57:10,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:57:10,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 04:57:10,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2023-04-01 04:57:10,696 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) [2023-04-01 04:57:10,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:57:10,849 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2023-04-01 04:57:10,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 04:57:10,849 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 [2023-04-01 04:57:10,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:57:10,850 INFO L225 Difference]: With dead ends: 37 [2023-04-01 04:57:10,850 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 04:57:10,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2023-04-01 04:57:10,851 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 26 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:57:10,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 40 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:57:10,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 04:57:10,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2023-04-01 04:57:10,855 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) [2023-04-01 04:57:10,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2023-04-01 04:57:10,856 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 20 [2023-04-01 04:57:10,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:57:10,856 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2023-04-01 04:57:10,856 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) [2023-04-01 04:57:10,856 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2023-04-01 04:57:10,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 04:57:10,857 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:57:10,857 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:57:10,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 04:57:11,063 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 [2023-04-01 04:57:11,063 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:57:11,064 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:57:11,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1716067809, now seen corresponding path program 3 times [2023-04-01 04:57:11,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:57:11,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270031805] [2023-04-01 04:57:11,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:57:11,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:57:11,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:57:11,281 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:57:11,282 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:57:11,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270031805] [2023-04-01 04:57:11,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270031805] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:57:11,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380601593] [2023-04-01 04:57:11,282 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 04:57:11,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:57:11,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:57:11,283 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:57:11,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 04:57:11,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 04:57:11,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 04:57:11,450 INFO L262 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 04:57:11,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:57:11,469 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:57:11,470 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:57:11,561 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:57:11,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380601593] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:57:11,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [604511130] [2023-04-01 04:57:11,563 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 04:57:11,563 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:57:11,563 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:57:11,563 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:57:11,563 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:57:11,576 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:57:11,741 INFO L197 IcfgInterpreter]: Interpreting procedure dll_create with input of size 27 for LOIs [2023-04-01 04:57:11,909 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:57:11,911 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:57:12,286 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '782#(and (<= 1 |#StackHeapBarrier|) (= 5 main_~len~0) (= |#NULL.offset| 0) (= 0 main_~head~1.offset) (= |#NULL.base| 0) (<= (+ main_~head~1.base 1) |#StackHeapBarrier|))' at error location [2023-04-01 04:57:12,286 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:57:12,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:57:12,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2023-04-01 04:57:12,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916013403] [2023-04-01 04:57:12,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:57:12,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 04:57:12,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:57:12,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 04:57:12,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2023-04-01 04:57:12,288 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) [2023-04-01 04:57:12,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:57:12,560 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2023-04-01 04:57:12,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 04:57:12,560 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 [2023-04-01 04:57:12,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:57:12,561 INFO L225 Difference]: With dead ends: 40 [2023-04-01 04:57:12,561 INFO L226 Difference]: Without dead ends: 31 [2023-04-01 04:57:12,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2023-04-01 04:57:12,562 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 24 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:57:12,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 106 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 04:57:12,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-01 04:57:12,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-04-01 04:57:12,565 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) [2023-04-01 04:57:12,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2023-04-01 04:57:12,565 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 23 [2023-04-01 04:57:12,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:57:12,565 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2023-04-01 04:57:12,565 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) [2023-04-01 04:57:12,565 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2023-04-01 04:57:12,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 04:57:12,566 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:57:12,566 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:57:12,572 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 04:57:12,773 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 [2023-04-01 04:57:12,773 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:57:12,774 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:57:12,774 INFO L85 PathProgramCache]: Analyzing trace with hash 847904924, now seen corresponding path program 4 times [2023-04-01 04:57:12,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:57:12,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839588908] [2023-04-01 04:57:12,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:57:12,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:57:12,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:57:12,971 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:57:12,971 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:57:12,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839588908] [2023-04-01 04:57:12,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839588908] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:57:12,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992480504] [2023-04-01 04:57:12,971 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 04:57:12,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:57:12,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:57:12,973 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 04:57:12,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 04:57:13,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:57:13,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 04:57:13,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:57:13,194 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:57:13,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:57:13,339 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 04:57:13,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992480504] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:57:13,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2077411154] [2023-04-01 04:57:13,341 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 04:57:13,341 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:57:13,341 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:57:13,341 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:57:13,341 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:57:13,357 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:57:13,525 INFO L197 IcfgInterpreter]: Interpreting procedure dll_create with input of size 27 for LOIs [2023-04-01 04:57:13,653 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:57:13,655 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:57:14,077 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1064#(and (<= 1 |#StackHeapBarrier|) (= 5 main_~len~0) (= |#NULL.offset| 0) (= 0 main_~head~1.offset) (= |#NULL.base| 0) (<= (+ main_~head~1.base 1) |#StackHeapBarrier|))' at error location [2023-04-01 04:57:14,077 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:57:14,077 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:57:14,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-04-01 04:57:14,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573536360] [2023-04-01 04:57:14,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:57:14,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 04:57:14,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:57:14,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 04:57:14,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2023-04-01 04:57:14,079 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) [2023-04-01 04:57:14,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:57:14,334 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2023-04-01 04:57:14,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 04:57:14,336 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 [2023-04-01 04:57:14,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:57:14,337 INFO L225 Difference]: With dead ends: 43 [2023-04-01 04:57:14,337 INFO L226 Difference]: Without dead ends: 34 [2023-04-01 04:57:14,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2023-04-01 04:57:14,338 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:57:14,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 80 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 04:57:14,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-01 04:57:14,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2023-04-01 04:57:14,340 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) [2023-04-01 04:57:14,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2023-04-01 04:57:14,341 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 26 [2023-04-01 04:57:14,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:57:14,341 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2023-04-01 04:57:14,341 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) [2023-04-01 04:57:14,341 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2023-04-01 04:57:14,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 04:57:14,341 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:57:14,342 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:57:14,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-04-01 04:57:14,542 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 [2023-04-01 04:57:14,542 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:57:14,543 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:57:14,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1833765633, now seen corresponding path program 5 times [2023-04-01 04:57:14,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:57:14,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374274589] [2023-04-01 04:57:14,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:57:14,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:57:14,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 04:57:14,731 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-04-01 04:57:14,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-04-01 04:57:14,883 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-04-01 04:57:14,883 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-04-01 04:57:14,884 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-04-01 04:57:14,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-04-01 04:57:14,887 INFO L445 BasicCegarLoop]: Path program histogram: [5, 1, 1] [2023-04-01 04:57:14,889 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-04-01 04:57:14,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.04 04:57:14 BoogieIcfgContainer [2023-04-01 04:57:14,961 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-04-01 04:57:14,962 INFO L158 Benchmark]: Toolchain (without parser) took 9065.24ms. Allocated memory was 175.1MB in the beginning and 416.3MB in the end (delta: 241.2MB). Free memory was 120.3MB in the beginning and 381.1MB in the end (delta: -260.8MB). Peak memory consumption was 140.3MB. Max. memory is 8.0GB. [2023-04-01 04:57:14,962 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 175.1MB. Free memory is still 130.5MB. There was no memory consumed. Max. memory is 8.0GB. [2023-04-01 04:57:14,962 INFO L158 Benchmark]: CACSL2BoogieTranslator took 270.28ms. Allocated memory is still 175.1MB. Free memory was 120.3MB in the beginning and 103.4MB in the end (delta: 16.9MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. [2023-04-01 04:57:14,962 INFO L158 Benchmark]: Boogie Preprocessor took 31.68ms. Allocated memory is still 175.1MB. Free memory was 103.1MB in the beginning and 100.6MB in the end (delta: 2.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-04-01 04:57:14,962 INFO L158 Benchmark]: RCFGBuilder took 678.93ms. Allocated memory was 175.1MB in the beginning and 223.3MB in the end (delta: 48.2MB). Free memory was 100.3MB in the beginning and 174.0MB in the end (delta: -73.6MB). Peak memory consumption was 11.9MB. Max. memory is 8.0GB. [2023-04-01 04:57:14,963 INFO L158 Benchmark]: TraceAbstraction took 8078.51ms. Allocated memory was 223.3MB in the beginning and 416.3MB in the end (delta: 192.9MB). Free memory was 173.4MB in the beginning and 381.1MB in the end (delta: -207.6MB). Peak memory consumption was 144.2MB. Max. memory is 8.0GB. [2023-04-01 04:57:14,966 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 175.1MB. Free memory is still 130.5MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 270.28ms. Allocated memory is still 175.1MB. Free memory was 120.3MB in the beginning and 103.4MB in the end (delta: 16.9MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 31.68ms. Allocated memory is still 175.1MB. Free memory was 103.1MB in the beginning and 100.6MB in the end (delta: 2.5MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * RCFGBuilder took 678.93ms. Allocated memory was 175.1MB in the beginning and 223.3MB in the end (delta: 48.2MB). Free memory was 100.3MB in the beginning and 174.0MB in the end (delta: -73.6MB). Peak memory consumption was 11.9MB. Max. memory is 8.0GB. * TraceAbstraction took 8078.51ms. Allocated memory was 223.3MB in the beginning and 416.3MB in the end (delta: 192.9MB). Free memory was 173.4MB in the beginning and 381.1MB in the end (delta: -207.6MB). Peak memory consumption was 144.2MB. 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: 8.0s, OverallIterations: 7, TraceHistogramMax: 5, PathProgramHistogramMax: 5, EmptinessCheckTime: 0.0s, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 98 SdHoareTripleChecker+Valid, 0.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 93 mSDsluCounter, 342 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 238 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 196 IncrementalHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 104 mSDtfsCounter, 196 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 296 GetRequests, 192 SyntacticMatches, 5 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.8s 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, 0.5s SatisfiabilityAnalysisTime, 1.2s 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! [2023-04-01 04:57:14,983 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...