/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-simple/dll2c_append_unequal.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:53:02,544 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:53:02,545 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:53:02,573 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:53:02,573 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:53:02,574 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:53:02,574 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:53:02,576 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:53:02,577 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:53:02,577 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:53:02,578 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:53:02,578 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:53:02,579 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:53:02,579 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:53:02,580 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:53:02,580 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:53:02,581 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:53:02,581 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:53:02,582 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:53:02,584 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:53:02,584 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:53:02,585 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:53:02,586 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:53:02,587 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:53:02,589 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:53:02,589 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:53:02,589 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:53:02,590 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:53:02,590 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:53:02,591 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:53:02,591 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:53:02,591 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:53:02,592 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:53:02,592 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:53:02,593 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:53:02,593 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:53:02,593 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:53:02,594 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:53:02,594 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:53:02,594 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:53:02,595 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:53:02,605 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 22:53:02,632 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:53:02,632 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:53:02,633 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:53:02,633 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:53:02,633 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:53:02,633 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:53:02,633 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:53:02,634 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:53:02,634 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:53:02,634 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:53:02,634 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:53:02,634 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:53:02,635 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:53:02,635 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:53:02,635 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:53:02,635 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:53:02,635 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:53:02,635 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:53:02,636 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:53:02,636 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:53:02,636 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:53:02,636 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:53:02,636 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:53:02,636 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:53:02,636 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:53:02,637 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:53:02,637 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:53:02,637 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:53:02,637 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:53:02,637 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:53:02,637 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:53:02,637 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:53:02,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:53:02,638 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:53:02,638 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:53:02,638 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:53:02,638 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:53:02,638 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:53:02,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:53:02,638 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:53:02,638 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:53:02,639 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:53:02,810 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:53:02,822 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:53:02,823 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:53:02,824 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:53:02,824 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:53:02,825 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2c_append_unequal.i [2023-03-31 22:53:03,717 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:53:03,926 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:53:03,926 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_append_unequal.i [2023-03-31 22:53:03,935 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c27f88897/b97496fe0f2c4f13936268cf2b2c9ff3/FLAG220e30771 [2023-03-31 22:53:03,946 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c27f88897/b97496fe0f2c4f13936268cf2b2c9ff3 [2023-03-31 22:53:03,948 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:53:03,949 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:53:03,950 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:53:03,950 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:53:03,959 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:53:03,959 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:53:03" (1/1) ... [2023-03-31 22:53:03,960 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@536d91d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:53:03, skipping insertion in model container [2023-03-31 22:53:03,960 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:53:03" (1/1) ... [2023-03-31 22:53:03,965 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:53:03,989 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:53:04,227 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_append_unequal.i[24672,24685] [2023-03-31 22:53:04,231 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:53:04,240 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:53:04,283 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_append_unequal.i[24672,24685] [2023-03-31 22:53:04,284 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:53:04,302 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:53:04,302 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:53:04 WrapperNode [2023-03-31 22:53:04,303 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:53:04,303 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:53:04,303 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:53:04,303 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:53:04,327 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:53:04" (1/1) ... [2023-03-31 22:53:04,327 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:53:04" (1/1) ... [2023-03-31 22:53:04,338 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:53:04" (1/1) ... [2023-03-31 22:53:04,339 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:53:04" (1/1) ... [2023-03-31 22:53:04,359 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:53:04" (1/1) ... [2023-03-31 22:53:04,362 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:53:04" (1/1) ... [2023-03-31 22:53:04,364 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:53:04" (1/1) ... [2023-03-31 22:53:04,372 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:53:04" (1/1) ... [2023-03-31 22:53:04,382 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:53:04,383 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:53:04,383 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:53:04,383 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:53:04,384 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:53:04" (1/1) ... [2023-03-31 22:53:04,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:53:04,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:53:04,411 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 22:53:04,413 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 22:53:04,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:53:04,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:53:04,445 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:53:04,445 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2023-03-31 22:53:04,446 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2023-03-31 22:53:04,446 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-03-31 22:53:04,447 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-03-31 22:53:04,449 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_create [2023-03-31 22:53:04,449 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_destroy [2023-03-31 22:53:04,449 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_append [2023-03-31 22:53:04,452 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:53:04,452 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:53:04,453 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:53:04,453 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-31 22:53:04,453 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-31 22:53:04,453 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:53:04,453 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:53:04,453 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2023-03-31 22:53:04,453 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2023-03-31 22:53:04,453 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-03-31 22:53:04,453 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-03-31 22:53:04,453 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-03-31 22:53:04,453 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-03-31 22:53:04,453 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-03-31 22:53:04,453 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-03-31 22:53:04,454 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-03-31 22:53:04,454 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-03-31 22:53:04,454 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-03-31 22:53:04,454 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-03-31 22:53:04,454 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-03-31 22:53:04,454 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-03-31 22:53:04,454 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-03-31 22:53:04,454 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-03-31 22:53:04,454 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-03-31 22:53:04,454 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-03-31 22:53:04,454 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-03-31 22:53:04,454 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-03-31 22:53:04,454 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-03-31 22:53:04,455 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-03-31 22:53:04,455 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-03-31 22:53:04,455 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-03-31 22:53:04,455 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-03-31 22:53:04,455 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-03-31 22:53:04,455 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-03-31 22:53:04,455 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-03-31 22:53:04,455 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-03-31 22:53:04,455 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-03-31 22:53:04,455 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-03-31 22:53:04,455 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-03-31 22:53:04,455 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-03-31 22:53:04,455 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-03-31 22:53:04,456 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-03-31 22:53:04,456 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-03-31 22:53:04,456 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-03-31 22:53:04,456 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-03-31 22:53:04,456 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-03-31 22:53:04,456 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-03-31 22:53:04,456 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-03-31 22:53:04,456 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-03-31 22:53:04,456 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-03-31 22:53:04,456 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-03-31 22:53:04,456 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-03-31 22:53:04,456 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-03-31 22:53:04,456 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-03-31 22:53:04,457 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-03-31 22:53:04,457 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-03-31 22:53:04,457 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-03-31 22:53:04,457 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-03-31 22:53:04,457 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-03-31 22:53:04,457 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-03-31 22:53:04,457 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-03-31 22:53:04,457 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-03-31 22:53:04,457 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-03-31 22:53:04,457 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-03-31 22:53:04,457 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-03-31 22:53:04,457 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-03-31 22:53:04,457 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-03-31 22:53:04,458 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2023-03-31 22:53:04,458 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-03-31 22:53:04,458 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2023-03-31 22:53:04,458 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-03-31 22:53:04,458 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:53:04,458 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2023-03-31 22:53:04,458 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-03-31 22:53:04,458 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-03-31 22:53:04,458 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-03-31 22:53:04,458 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-03-31 22:53:04,459 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-03-31 22:53:04,459 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-03-31 22:53:04,459 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-03-31 22:53:04,459 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-03-31 22:53:04,459 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-03-31 22:53:04,459 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-03-31 22:53:04,459 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-03-31 22:53:04,459 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-03-31 22:53:04,459 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-03-31 22:53:04,459 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-03-31 22:53:04,459 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-03-31 22:53:04,459 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-03-31 22:53:04,459 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-03-31 22:53:04,459 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-03-31 22:53:04,459 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-03-31 22:53:04,460 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-03-31 22:53:04,460 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-03-31 22:53:04,460 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-03-31 22:53:04,460 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-03-31 22:53:04,460 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-03-31 22:53:04,460 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-03-31 22:53:04,460 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-03-31 22:53:04,460 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-03-31 22:53:04,460 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-03-31 22:53:04,460 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-03-31 22:53:04,460 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-03-31 22:53:04,461 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-03-31 22:53:04,461 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-03-31 22:53:04,461 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-03-31 22:53:04,461 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-03-31 22:53:04,461 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-03-31 22:53:04,461 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-03-31 22:53:04,462 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-03-31 22:53:04,462 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-03-31 22:53:04,462 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-03-31 22:53:04,465 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-03-31 22:53:04,465 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-31 22:53:04,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-03-31 22:53:04,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:53:04,467 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_create [2023-03-31 22:53:04,467 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_destroy [2023-03-31 22:53:04,467 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-03-31 22:53:04,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:53:04,468 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_append [2023-03-31 22:53:04,468 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:53:04,468 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 22:53:04,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-03-31 22:53:04,468 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:53:04,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:53:04,468 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:53:04,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:53:04,735 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:53:04,737 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:53:04,814 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-03-31 22:53:04,926 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:53:05,001 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:53:05,001 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-03-31 22:53:05,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:53:05 BoogieIcfgContainer [2023-03-31 22:53:05,003 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:53:05,004 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:53:05,005 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:53:05,007 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:53:05,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:53:03" (1/3) ... [2023-03-31 22:53:05,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@418be900 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:53:05, skipping insertion in model container [2023-03-31 22:53:05,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:53:04" (2/3) ... [2023-03-31 22:53:05,007 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@418be900 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:53:05, skipping insertion in model container [2023-03-31 22:53:05,008 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:53:05" (3/3) ... [2023-03-31 22:53:05,008 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2c_append_unequal.i [2023-03-31 22:53:05,019 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:53:05,019 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:53:05,054 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:53:05,058 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;@245870a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:53:05,058 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:53:05,061 INFO L276 IsEmpty]: Start isEmpty. Operand has 46 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 30 states have internal predecessors, (39), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-03-31 22:53:05,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-03-31 22:53:05,066 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:53:05,066 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:53:05,067 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:53:05,071 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:53:05,071 INFO L85 PathProgramCache]: Analyzing trace with hash -2111312556, now seen corresponding path program 1 times [2023-03-31 22:53:05,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:53:05,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052164407] [2023-03-31 22:53:05,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:53:05,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:53:05,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:53:05,541 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 22:53:05,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:53:05,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052164407] [2023-03-31 22:53:05,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052164407] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:53:05,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:53:05,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:53:05,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944793967] [2023-03-31 22:53:05,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:53:05,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:53:05,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:53:05,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:53:05,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:53:05,581 INFO L87 Difference]: Start difference. First operand has 46 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 30 states have internal predecessors, (39), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 5 states, 3 states have (on average 5.0) internal successors, (15), 5 states have internal predecessors, (15), 4 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-03-31 22:53:05,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:53:05,793 INFO L93 Difference]: Finished difference Result 83 states and 102 transitions. [2023-03-31 22:53:05,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 22:53:05,795 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 5.0) internal successors, (15), 5 states have internal predecessors, (15), 4 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 29 [2023-03-31 22:53:05,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:53:05,799 INFO L225 Difference]: With dead ends: 83 [2023-03-31 22:53:05,799 INFO L226 Difference]: Without dead ends: 35 [2023-03-31 22:53:05,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-31 22:53:05,810 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 17 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 22:53:05,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 151 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 22:53:05,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-03-31 22:53:05,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2023-03-31 22:53:05,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 22:53:05,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2023-03-31 22:53:05,853 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 29 [2023-03-31 22:53:05,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:53:05,854 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2023-03-31 22:53:05,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 5.0) internal successors, (15), 5 states have internal predecessors, (15), 4 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-03-31 22:53:05,854 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2023-03-31 22:53:05,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-03-31 22:53:05,867 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:53:05,867 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:53:05,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:53:05,867 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:53:05,868 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:53:05,868 INFO L85 PathProgramCache]: Analyzing trace with hash 332058475, now seen corresponding path program 1 times [2023-03-31 22:53:05,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:53:05,868 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714649215] [2023-03-31 22:53:05,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:53:05,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:53:06,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:53:13,826 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 22:53:13,826 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:53:13,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714649215] [2023-03-31 22:53:13,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714649215] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:53:13,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270229121] [2023-03-31 22:53:13,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:53:13,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:53:13,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:53:13,838 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:53:13,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-03-31 22:53:14,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:53:14,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 730 conjuncts, 198 conjunts are in the unsatisfiable core [2023-03-31 22:53:14,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:53:14,268 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-03-31 22:53:14,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-03-31 22:53:14,656 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-31 22:53:14,782 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:53:14,783 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-03-31 22:53:14,804 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2023-03-31 22:53:14,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:53:14,809 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2023-03-31 22:53:14,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:53:14,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:53:14,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 14 [2023-03-31 22:53:14,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:53:14,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:53:14,920 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 19 [2023-03-31 22:53:14,923 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 18 [2023-03-31 22:53:14,932 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-03-31 22:53:15,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:53:15,040 INFO L321 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2023-03-31 22:53:15,040 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 38 [2023-03-31 22:53:15,232 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-03-31 22:53:15,235 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 40 [2023-03-31 22:53:15,242 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-03-31 22:53:15,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:53:15,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 5 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2023-03-31 22:53:15,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3