/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/list-properties/list_flag-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:48:03,164 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:48:03,166 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:48:03,206 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:48:03,206 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:48:03,210 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:48:03,213 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:48:03,216 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:48:03,218 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:48:03,223 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:48:03,224 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:48:03,226 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:48:03,226 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:48:03,229 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:48:03,231 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:48:03,233 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:48:03,234 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:48:03,234 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:48:03,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:48:03,242 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:48:03,243 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:48:03,246 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:48:03,246 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:48:03,248 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:48:03,257 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:48:03,257 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:48:03,257 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:48:03,259 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:48:03,259 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:48:03,260 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:48:03,260 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:48:03,261 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:48:03,262 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:48:03,263 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:48:03,263 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:48:03,263 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:48:03,264 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:48:03,264 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:48:03,264 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:48:03,265 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:48:03,265 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:48:03,266 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-03-31 22:48:03,286 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:48:03,286 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:48:03,286 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:48:03,287 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:48:03,287 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:48:03,287 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:48:03,287 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:48:03,288 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:48:03,288 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:48:03,288 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:48:03,288 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:48:03,288 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:48:03,288 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:48:03,288 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:48:03,289 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:48:03,289 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:48:03,289 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:48:03,289 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:48:03,290 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:48:03,290 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:48:03,290 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:48:03,290 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:48:03,290 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:48:03,290 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:48:03,290 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:48:03,290 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:48:03,291 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:48:03,291 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:48:03,291 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:48:03,291 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:48:03,291 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:48:03,291 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:48:03,291 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:48:03,292 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:48:03,292 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:48:03,292 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:48:03,292 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:48:03,292 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:48:03,292 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:48:03,292 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:48:03,293 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:48:03,293 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:48:03,562 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:48:03,591 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:48:03,594 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:48:03,595 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:48:03,596 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:48:03,597 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/list_flag-1.i [2023-03-31 22:48:04,719 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:48:04,955 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:48:04,956 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/list_flag-1.i [2023-03-31 22:48:04,972 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/deae92db7/b01b9ad1bc7c467ba4532d12c133b844/FLAGc5c6860f2 [2023-03-31 22:48:04,986 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/deae92db7/b01b9ad1bc7c467ba4532d12c133b844 [2023-03-31 22:48:04,988 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:48:04,989 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:48:04,990 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:48:04,990 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:48:04,993 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:48:04,994 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:48:04" (1/1) ... [2023-03-31 22:48:04,995 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c887d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:48:04, skipping insertion in model container [2023-03-31 22:48:04,995 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:48:04" (1/1) ... [2023-03-31 22:48:05,001 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:48:05,036 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:48:05,371 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-properties/list_flag-1.i[23375,23388] [2023-03-31 22:48:05,375 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:48:05,385 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:48:05,425 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-properties/list_flag-1.i[23375,23388] [2023-03-31 22:48:05,426 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:48:05,452 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:48:05,452 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:48:05 WrapperNode [2023-03-31 22:48:05,452 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:48:05,453 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:48:05,454 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:48:05,454 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:48:05,463 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:48:05" (1/1) ... [2023-03-31 22:48:05,463 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:48:05" (1/1) ... [2023-03-31 22:48:05,476 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:48:05" (1/1) ... [2023-03-31 22:48:05,476 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:48:05" (1/1) ... [2023-03-31 22:48:05,499 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:48:05" (1/1) ... [2023-03-31 22:48:05,503 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:48:05" (1/1) ... [2023-03-31 22:48:05,505 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:48:05" (1/1) ... [2023-03-31 22:48:05,507 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:48:05" (1/1) ... [2023-03-31 22:48:05,511 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:48:05,512 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:48:05,512 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:48:05,512 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:48:05,513 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:48:05" (1/1) ... [2023-03-31 22:48:05,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:48:05,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:48:05,549 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-03-31 22:48:05,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-03-31 22:48:05,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:48:05,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:48:05,580 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:48:05,581 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2023-03-31 22:48:05,581 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2023-03-31 22:48:05,581 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2023-03-31 22:48:05,581 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2023-03-31 22:48:05,581 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2023-03-31 22:48:05,581 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-03-31 22:48:05,581 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:48:05,581 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:48:05,581 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:48:05,582 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-31 22:48:05,582 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-31 22:48:05,582 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:48:05,582 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:48:05,582 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:48:05,582 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-03-31 22:48:05,582 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-03-31 22:48:05,582 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-03-31 22:48:05,582 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-03-31 22:48:05,583 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-03-31 22:48:05,583 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-03-31 22:48:05,583 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-03-31 22:48:05,583 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-03-31 22:48:05,583 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-03-31 22:48:05,583 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-03-31 22:48:05,583 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-03-31 22:48:05,583 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-03-31 22:48:05,583 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-03-31 22:48:05,584 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-03-31 22:48:05,584 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-03-31 22:48:05,584 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-03-31 22:48:05,584 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2023-03-31 22:48:05,584 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2023-03-31 22:48:05,584 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2023-03-31 22:48:05,584 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2023-03-31 22:48:05,584 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2023-03-31 22:48:05,585 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-03-31 22:48:05,585 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-03-31 22:48:05,585 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-03-31 22:48:05,585 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-03-31 22:48:05,585 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-03-31 22:48:05,585 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-03-31 22:48:05,585 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-03-31 22:48:05,585 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-03-31 22:48:05,586 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-03-31 22:48:05,586 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-03-31 22:48:05,586 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-03-31 22:48:05,586 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-03-31 22:48:05,586 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-03-31 22:48:05,586 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-03-31 22:48:05,586 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-03-31 22:48:05,587 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-03-31 22:48:05,587 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-03-31 22:48:05,587 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-03-31 22:48:05,587 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-03-31 22:48:05,587 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-03-31 22:48:05,587 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-03-31 22:48:05,587 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-03-31 22:48:05,587 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-03-31 22:48:05,587 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-03-31 22:48:05,588 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-03-31 22:48:05,588 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-03-31 22:48:05,588 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-03-31 22:48:05,588 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-03-31 22:48:05,588 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-03-31 22:48:05,588 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-03-31 22:48:05,588 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-03-31 22:48:05,588 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-03-31 22:48:05,588 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-03-31 22:48:05,588 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-03-31 22:48:05,589 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-03-31 22:48:05,589 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-03-31 22:48:05,589 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-03-31 22:48:05,589 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-03-31 22:48:05,589 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-03-31 22:48:05,589 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-03-31 22:48:05,589 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-03-31 22:48:05,589 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2023-03-31 22:48:05,589 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-03-31 22:48:05,589 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2023-03-31 22:48:05,590 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-03-31 22:48:05,590 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:48:05,590 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2023-03-31 22:48:05,590 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-03-31 22:48:05,590 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-03-31 22:48:05,590 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-03-31 22:48:05,590 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-03-31 22:48:05,590 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-03-31 22:48:05,590 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-03-31 22:48:05,590 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-03-31 22:48:05,590 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-03-31 22:48:05,591 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-03-31 22:48:05,591 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-03-31 22:48:05,591 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-03-31 22:48:05,591 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-03-31 22:48:05,591 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-03-31 22:48:05,591 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-03-31 22:48:05,591 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-03-31 22:48:05,591 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-03-31 22:48:05,591 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-03-31 22:48:05,591 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-03-31 22:48:05,592 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-03-31 22:48:05,592 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-03-31 22:48:05,592 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-03-31 22:48:05,592 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-03-31 22:48:05,592 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-03-31 22:48:05,592 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-03-31 22:48:05,592 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-03-31 22:48:05,592 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-03-31 22:48:05,592 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-03-31 22:48:05,592 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-03-31 22:48:05,593 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-03-31 22:48:05,593 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-03-31 22:48:05,593 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-03-31 22:48:05,593 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-03-31 22:48:05,593 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-03-31 22:48:05,593 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-03-31 22:48:05,593 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-03-31 22:48:05,593 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-03-31 22:48:05,594 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-03-31 22:48:05,594 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-03-31 22:48:05,594 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-03-31 22:48:05,594 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:48:05,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-31 22:48:05,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:48:05,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-03-31 22:48:05,594 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-03-31 22:48:05,594 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:48:05,594 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:48:05,595 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:48:05,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:48:05,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:48:05,847 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:48:05,849 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:48:05,886 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-03-31 22:48:06,000 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:48:06,027 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:48:06,028 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-03-31 22:48:06,030 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:48:06 BoogieIcfgContainer [2023-03-31 22:48:06,030 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:48:06,032 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:48:06,032 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:48:06,035 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:48:06,035 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:48:04" (1/3) ... [2023-03-31 22:48:06,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aed5e8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:48:06, skipping insertion in model container [2023-03-31 22:48:06,036 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:48:05" (2/3) ... [2023-03-31 22:48:06,036 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aed5e8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:48:06, skipping insertion in model container [2023-03-31 22:48:06,037 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:48:06" (3/3) ... [2023-03-31 22:48:06,038 INFO L112 eAbstractionObserver]: Analyzing ICFG list_flag-1.i [2023-03-31 22:48:06,054 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:48:06,055 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:48:06,134 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:48:06,140 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;@5bac2dae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:48:06,141 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:48:06,144 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 23 states have internal predecessors, (32), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:48:06,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-03-31 22:48:06,154 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:48:06,155 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:48:06,156 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:48:06,162 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:48:06,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1903290210, now seen corresponding path program 1 times [2023-03-31 22:48:06,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:48:06,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459287910] [2023-03-31 22:48:06,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:48:06,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:48:06,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:48:06,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:48:06,344 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:48:06,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459287910] [2023-03-31 22:48:06,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459287910] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:48:06,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:48:06,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-03-31 22:48:06,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012260115] [2023-03-31 22:48:06,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:48:06,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-03-31 22:48:06,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:48:06,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-03-31 22:48:06,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 22:48:06,391 INFO L87 Difference]: Start difference. First operand has 29 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 23 states have internal predecessors, (32), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:48:06,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:48:06,426 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2023-03-31 22:48:06,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-03-31 22:48:06,429 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2023-03-31 22:48:06,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:48:06,434 INFO L225 Difference]: With dead ends: 43 [2023-03-31 22:48:06,434 INFO L226 Difference]: Without dead ends: 21 [2023-03-31 22:48:06,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 22:48:06,441 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:48:06,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 22:48:06,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-03-31 22:48:06,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-03-31 22:48:06,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:48:06,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2023-03-31 22:48:06,474 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 14 [2023-03-31 22:48:06,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:48:06,475 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2023-03-31 22:48:06,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:48:06,477 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2023-03-31 22:48:06,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-03-31 22:48:06,478 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:48:06,478 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:48:06,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:48:06,479 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:48:06,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:48:06,480 INFO L85 PathProgramCache]: Analyzing trace with hash -871490984, now seen corresponding path program 1 times [2023-03-31 22:48:06,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:48:06,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340776223] [2023-03-31 22:48:06,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:48:06,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:48:06,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:48:06,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:48:06,732 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:48:06,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340776223] [2023-03-31 22:48:06,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340776223] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:48:06,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:48:06,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:48:06,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7391699] [2023-03-31 22:48:06,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:48:06,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:48:06,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:48:06,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:48:06,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:48:06,736 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:48:06,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:48:06,843 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2023-03-31 22:48:06,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 22:48:06,844 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2023-03-31 22:48:06,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:48:06,846 INFO L225 Difference]: With dead ends: 43 [2023-03-31 22:48:06,846 INFO L226 Difference]: Without dead ends: 39 [2023-03-31 22:48:06,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-03-31 22:48:06,850 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 22 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:48:06,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 59 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 22:48:06,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-03-31 22:48:06,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2023-03-31 22:48:06,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:48:06,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2023-03-31 22:48:06,865 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 16 [2023-03-31 22:48:06,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:48:06,866 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2023-03-31 22:48:06,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:48:06,866 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2023-03-31 22:48:06,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-03-31 22:48:06,867 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:48:06,867 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:48:06,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:48:06,868 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:48:06,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:48:06,873 INFO L85 PathProgramCache]: Analyzing trace with hash 64463731, now seen corresponding path program 1 times [2023-03-31 22:48:06,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:48:06,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376041323] [2023-03-31 22:48:06,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:48:06,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:48:06,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:48:07,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:48:07,089 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:48:07,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376041323] [2023-03-31 22:48:07,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376041323] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:48:07,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:48:07,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:48:07,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843614000] [2023-03-31 22:48:07,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:48:07,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:48:07,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:48:07,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:48:07,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:48:07,092 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:48:07,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:48:07,164 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2023-03-31 22:48:07,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 22:48:07,164 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-03-31 22:48:07,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:48:07,165 INFO L225 Difference]: With dead ends: 45 [2023-03-31 22:48:07,165 INFO L226 Difference]: Without dead ends: 37 [2023-03-31 22:48:07,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-03-31 22:48:07,166 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 18 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:48:07,167 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 63 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 22:48:07,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-03-31 22:48:07,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 27. [2023-03-31 22:48:07,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:48:07,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2023-03-31 22:48:07,171 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 18 [2023-03-31 22:48:07,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:48:07,172 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2023-03-31 22:48:07,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:48:07,172 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2023-03-31 22:48:07,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-03-31 22:48:07,172 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:48:07,173 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:48:07,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:48:07,173 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:48:07,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:48:07,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1179277790, now seen corresponding path program 1 times [2023-03-31 22:48:07,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:48:07,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753053119] [2023-03-31 22:48:07,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:48:07,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:48:07,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:48:07,300 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:48:07,300 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:48:07,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753053119] [2023-03-31 22:48:07,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753053119] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:48:07,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:48:07,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:48:07,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149212441] [2023-03-31 22:48:07,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:48:07,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:48:07,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:48:07,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:48:07,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:48:07,303 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:48:07,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:48:07,370 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2023-03-31 22:48:07,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 22:48:07,372 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2023-03-31 22:48:07,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:48:07,373 INFO L225 Difference]: With dead ends: 43 [2023-03-31 22:48:07,373 INFO L226 Difference]: Without dead ends: 33 [2023-03-31 22:48:07,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-03-31 22:48:07,381 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 14 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:48:07,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 52 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 22:48:07,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-03-31 22:48:07,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2023-03-31 22:48:07,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:48:07,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-03-31 22:48:07,387 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2023-03-31 22:48:07,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:48:07,387 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-03-31 22:48:07,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:48:07,389 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-03-31 22:48:07,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-03-31 22:48:07,389 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:48:07,389 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:48:07,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-03-31 22:48:07,390 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:48:07,390 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:48:07,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1532175620, now seen corresponding path program 1 times [2023-03-31 22:48:07,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:48:07,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096307408] [2023-03-31 22:48:07,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:48:07,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:48:07,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-03-31 22:48:07,430 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-03-31 22:48:07,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-03-31 22:48:07,465 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-03-31 22:48:07,465 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-03-31 22:48:07,466 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-03-31 22:48:07,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-31 22:48:07,471 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-03-31 22:48:07,475 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-03-31 22:48:07,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.03 10:48:07 BoogieIcfgContainer [2023-03-31 22:48:07,492 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-03-31 22:48:07,492 INFO L158 Benchmark]: Toolchain (without parser) took 2503.22ms. Allocated memory was 186.6MB in the beginning and 224.4MB in the end (delta: 37.7MB). Free memory was 139.1MB in the beginning and 172.1MB in the end (delta: -33.1MB). Peak memory consumption was 4.9MB. Max. memory is 8.0GB. [2023-03-31 22:48:07,492 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 186.6MB. Free memory is still 135.7MB. There was no memory consumed. Max. memory is 8.0GB. [2023-03-31 22:48:07,493 INFO L158 Benchmark]: CACSL2BoogieTranslator took 462.61ms. Allocated memory is still 186.6MB. Free memory was 138.8MB in the beginning and 122.2MB in the end (delta: 16.6MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. [2023-03-31 22:48:07,493 INFO L158 Benchmark]: Boogie Preprocessor took 57.98ms. Allocated memory is still 186.6MB. Free memory was 122.2MB in the beginning and 119.4MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2023-03-31 22:48:07,493 INFO L158 Benchmark]: RCFGBuilder took 518.12ms. Allocated memory is still 186.6MB. Free memory was 119.4MB in the beginning and 96.8MB in the end (delta: 22.6MB). Peak memory consumption was 23.1MB. Max. memory is 8.0GB. [2023-03-31 22:48:07,493 INFO L158 Benchmark]: TraceAbstraction took 1459.79ms. Allocated memory was 186.6MB in the beginning and 224.4MB in the end (delta: 37.7MB). Free memory was 96.3MB in the beginning and 172.1MB in the end (delta: -75.8MB). There was no memory consumed. Max. memory is 8.0GB. [2023-03-31 22:48:07,494 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 186.6MB. Free memory is still 135.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 462.61ms. Allocated memory is still 186.6MB. Free memory was 138.8MB in the beginning and 122.2MB in the end (delta: 16.6MB). Peak memory consumption was 16.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 57.98ms. Allocated memory is still 186.6MB. Free memory was 122.2MB in the beginning and 119.4MB in the end (delta: 2.8MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 518.12ms. Allocated memory is still 186.6MB. Free memory was 119.4MB in the beginning and 96.8MB in the end (delta: 22.6MB). Peak memory consumption was 23.1MB. Max. memory is 8.0GB. * TraceAbstraction took 1459.79ms. Allocated memory was 186.6MB in the beginning and 224.4MB in the end (delta: 37.7MB). Free memory was 96.3MB in the beginning and 172.1MB in the end (delta: -75.8MB). There was no memory consumed. 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: 557]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L532] int flag = __VERIFIER_nondet_int(); [L533] List p, a, t; [L534] a = (List) malloc(sizeof(struct node)) [L535] COND FALSE !(a == 0) VAL [a={-1:0}, flag=0] [L536] p = a VAL [a={-1:0}, flag=0, p={-1:0}] [L537] COND TRUE __VERIFIER_nondet_int() [L538] COND FALSE !(\read(flag)) [L541] p->h = 2 [L543] t = (List) malloc(sizeof(struct node)) [L544] COND FALSE !(t == 0) VAL [a={-1:0}, flag=0, p={-1:0}, t={-2:0}] [L545] p->n = t [L546] EXPR p->n [L546] p = p->n [L537] COND FALSE !(__VERIFIER_nondet_int()) [L548] p->h = 3 [L549] p = a VAL [a={-1:0}, flag=0, p={-1:0}, t={-2:0}] [L550] COND FALSE !(\read(flag)) VAL [a={-1:0}, flag=0, p={-1:0}, t={-2:0}] [L554] EXPR p->h VAL [a={-1:0}, flag=0, p->h=2, p={-1:0}, t={-2:0}] [L554] COND FALSE !(p->h == 1) [L556] EXPR p->h VAL [a={-1:0}, flag=0, p->h=2, p={-1:0}, t={-2:0}] [L556] COND TRUE p->h != 3 [L557] reach_error() VAL [a={-1:0}, flag=0, p={-1:0}, t={-2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.4s, OverallIterations: 5, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 54 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 54 mSDsluCounter, 206 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 123 mSDsCounter, 6 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 129 IncrementalHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 6 mSolverCounterUnsat, 83 mSDtfsCounter, 129 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=0, InterpolantAutomatonStates: 17, 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, 4 MinimizatonAttempts, 30 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 86 NumberOfCodeBlocks, 86 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 62 ConstructedInterpolants, 0 QuantifiedInterpolants, 170 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 4/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-03-31 22:48:07,511 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...