/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 EqDomain -i ../sv-benchmarks/c/list-simple/dll2c_append_equal.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:56:50,296 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:56:50,298 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:56:50,321 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:56:50,322 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:56:50,323 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:56:50,324 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:56:50,335 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:56:50,336 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:56:50,337 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:56:50,338 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:56:50,338 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:56:50,339 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:56:50,339 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:56:50,340 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:56:50,341 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:56:50,343 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:56:50,348 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:56:50,351 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:56:50,353 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:56:50,354 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:56:50,358 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:56:50,360 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:56:50,361 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:56:50,365 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:56:50,366 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:56:50,366 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:56:50,366 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:56:50,367 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:56:50,367 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:56:50,367 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:56:50,368 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:56:50,369 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:56:50,369 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:56:50,370 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:56:50,370 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:56:50,371 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:56:50,371 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:56:50,371 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:56:50,372 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:56:50,372 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:56:50,381 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 10:56:50,413 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:56:50,413 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:56:50,413 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:56:50,414 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:56:50,414 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:56:50,415 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:56:50,415 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:56:50,415 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:56:50,415 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:56:50,415 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:56:50,416 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:56:50,416 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:56:50,416 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:56:50,416 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:56:50,416 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:56:50,417 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:56:50,417 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:56:50,417 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:56:50,417 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:56:50,417 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:56:50,418 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:56:50,418 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:56:50,418 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:56:50,418 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:56:50,418 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:56:50,418 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:56:50,418 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:56:50,419 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:56:50,419 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:56:50,419 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:56:50,419 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:56:50,419 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:56:50,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:56:50,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:56:50,420 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:56:50,420 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:56:50,420 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:56:50,420 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:56:50,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:56:50,420 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:56:50,420 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:56:50,420 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:56:50,665 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:56:50,686 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:56:50,688 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:56:50,690 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:56:50,690 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:56:50,691 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2c_append_equal.i [2023-04-01 10:56:51,924 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:56:52,150 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:56:52,151 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_append_equal.i [2023-04-01 10:56:52,163 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7990a2e16/2032dcf0d7e84c38b3e2a3e19b5bcb15/FLAGa0b516eff [2023-04-01 10:56:52,177 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7990a2e16/2032dcf0d7e84c38b3e2a3e19b5bcb15 [2023-04-01 10:56:52,180 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:56:52,181 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:56:52,185 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:56:52,186 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:56:52,189 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:56:52,189 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:56:52" (1/1) ... [2023-04-01 10:56:52,191 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39e2d3b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:56:52, skipping insertion in model container [2023-04-01 10:56:52,191 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:56:52" (1/1) ... [2023-04-01 10:56:52,197 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:56:52,229 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:56:52,530 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_equal.i[24585,24598] [2023-04-01 10:56:52,535 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:56:52,545 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:56:52,606 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_equal.i[24585,24598] [2023-04-01 10:56:52,608 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:56:52,635 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:56:52,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:56:52 WrapperNode [2023-04-01 10:56:52,636 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:56:52,637 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:56:52,637 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:56:52,637 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:56:52,646 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:56:52" (1/1) ... [2023-04-01 10:56:52,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:56:52" (1/1) ... [2023-04-01 10:56:52,662 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:56:52" (1/1) ... [2023-04-01 10:56:52,662 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:56:52" (1/1) ... [2023-04-01 10:56:52,679 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:56:52" (1/1) ... [2023-04-01 10:56:52,683 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:56:52" (1/1) ... [2023-04-01 10:56:52,687 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:56:52" (1/1) ... [2023-04-01 10:56:52,689 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:56:52" (1/1) ... [2023-04-01 10:56:52,694 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:56:52,695 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:56:52,695 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:56:52,695 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:56:52,697 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:56:52" (1/1) ... [2023-04-01 10:56:52,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:56:52,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:56:52,726 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 10:56:52,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 10:56:52,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:56:52,765 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:56:52,765 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:56:52,765 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2023-04-01 10:56:52,765 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2023-04-01 10:56:52,765 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-04-01 10:56:52,766 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-04-01 10:56:52,766 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_create [2023-04-01 10:56:52,766 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_destroy [2023-04-01 10:56:52,766 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_append [2023-04-01 10:56:52,766 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:56:52,766 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:56:52,766 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:56:52,766 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 10:56:52,767 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 10:56:52,767 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:56:52,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:56:52,767 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2023-04-01 10:56:52,767 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2023-04-01 10:56:52,767 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-04-01 10:56:52,767 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-04-01 10:56:52,767 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-04-01 10:56:52,767 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-04-01 10:56:52,768 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-04-01 10:56:52,768 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-04-01 10:56:52,768 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-04-01 10:56:52,768 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-04-01 10:56:52,768 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-04-01 10:56:52,768 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-04-01 10:56:52,768 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-04-01 10:56:52,768 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-04-01 10:56:52,769 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-04-01 10:56:52,769 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-04-01 10:56:52,769 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-04-01 10:56:52,769 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-04-01 10:56:52,769 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-04-01 10:56:52,769 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-04-01 10:56:52,769 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-04-01 10:56:52,769 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-04-01 10:56:52,769 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-04-01 10:56:52,769 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-04-01 10:56:52,770 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-04-01 10:56:52,770 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-04-01 10:56:52,770 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-04-01 10:56:52,770 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-04-01 10:56:52,770 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-04-01 10:56:52,770 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-04-01 10:56:52,770 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-04-01 10:56:52,770 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-04-01 10:56:52,771 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-04-01 10:56:52,771 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-04-01 10:56:52,771 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-04-01 10:56:52,771 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-04-01 10:56:52,771 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-04-01 10:56:52,771 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-04-01 10:56:52,771 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-04-01 10:56:52,771 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-04-01 10:56:52,771 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-04-01 10:56:52,772 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-04-01 10:56:52,772 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-04-01 10:56:52,772 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-04-01 10:56:52,772 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-04-01 10:56:52,772 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-04-01 10:56:52,772 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-04-01 10:56:52,772 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-04-01 10:56:52,772 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-04-01 10:56:52,772 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-04-01 10:56:52,773 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-04-01 10:56:52,773 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-04-01 10:56:52,773 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 10:56:52,773 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-04-01 10:56:52,773 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-04-01 10:56:52,773 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 10:56:52,773 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-04-01 10:56:52,773 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-04-01 10:56:52,773 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-04-01 10:56:52,773 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-04-01 10:56:52,774 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2023-04-01 10:56:52,774 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-04-01 10:56:52,774 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2023-04-01 10:56:52,774 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-04-01 10:56:52,774 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:56:52,774 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2023-04-01 10:56:52,774 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-04-01 10:56:52,774 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-04-01 10:56:52,774 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-04-01 10:56:52,775 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-04-01 10:56:52,775 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-04-01 10:56:52,775 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-04-01 10:56:52,775 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-04-01 10:56:52,775 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-04-01 10:56:52,775 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-04-01 10:56:52,775 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-04-01 10:56:52,775 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-04-01 10:56:52,775 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-04-01 10:56:52,775 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-04-01 10:56:52,776 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-04-01 10:56:52,776 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-04-01 10:56:52,776 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-04-01 10:56:52,776 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-04-01 10:56:52,776 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-04-01 10:56:52,776 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-04-01 10:56:52,776 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-04-01 10:56:52,776 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-04-01 10:56:52,776 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-04-01 10:56:52,776 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-04-01 10:56:52,777 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-04-01 10:56:52,777 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-04-01 10:56:52,777 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-04-01 10:56:52,777 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-04-01 10:56:52,777 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-04-01 10:56:52,777 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-04-01 10:56:52,777 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-04-01 10:56:52,777 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-04-01 10:56:52,777 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-04-01 10:56:52,778 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-04-01 10:56:52,778 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-04-01 10:56:52,778 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-04-01 10:56:52,778 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-04-01 10:56:52,778 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-04-01 10:56:52,778 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-04-01 10:56:52,778 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-04-01 10:56:52,778 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-04-01 10:56:52,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 10:56:52,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 10:56:52,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:56:52,779 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_create [2023-04-01 10:56:52,779 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_destroy [2023-04-01 10:56:52,779 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 10:56:52,779 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:56:52,779 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_append [2023-04-01 10:56:52,779 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:56:52,779 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 10:56:52,779 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-04-01 10:56:52,780 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:56:52,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:56:52,780 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:56:52,780 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:56:53,055 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:56:53,057 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:56:53,178 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-04-01 10:56:53,388 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:56:53,472 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:56:53,472 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 10:56:53,475 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:56:53 BoogieIcfgContainer [2023-04-01 10:56:53,475 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:56:53,478 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:56:53,478 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:56:53,481 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:56:53,481 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:56:52" (1/3) ... [2023-04-01 10:56:53,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33eb58a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:56:53, skipping insertion in model container [2023-04-01 10:56:53,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:56:52" (2/3) ... [2023-04-01 10:56:53,482 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33eb58a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:56:53, skipping insertion in model container [2023-04-01 10:56:53,482 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:56:53" (3/3) ... [2023-04-01 10:56:53,485 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2c_append_equal.i [2023-04-01 10:56:53,501 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:56:53,501 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:56:53,555 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:56:53,560 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;@34d43fa7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:56:53,561 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:56:53,564 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 28 states have internal predecessors, (36), 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) [2023-04-01 10:56:53,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 10:56:53,571 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:56:53,572 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] [2023-04-01 10:56:53,573 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:56:53,577 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:56:53,578 INFO L85 PathProgramCache]: Analyzing trace with hash -1486292237, now seen corresponding path program 1 times [2023-04-01 10:56:53,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:56:53,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675482937] [2023-04-01 10:56:53,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:56:53,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:56:53,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:56:54,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 10:56:54,205 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:56:54,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675482937] [2023-04-01 10:56:54,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675482937] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:56:54,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:56:54,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:56:54,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236061784] [2023-04-01 10:56:54,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:56:54,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:56:54,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:56:54,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:56:54,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:56:54,240 INFO L87 Difference]: Start difference. First operand has 44 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 28 states have internal predecessors, (36), 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) [2023-04-01 10:56:54,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:56:54,439 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2023-04-01 10:56:54,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 10:56:54,442 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 [2023-04-01 10:56:54,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:56:54,448 INFO L225 Difference]: With dead ends: 79 [2023-04-01 10:56:54,448 INFO L226 Difference]: Without dead ends: 33 [2023-04-01 10:56:54,450 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 10:56:54,453 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 14 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 142 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 [2023-04-01 10:56:54,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 142 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 10:56:54,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-04-01 10:56:54,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2023-04-01 10:56:54,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 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) [2023-04-01 10:56:54,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-04-01 10:56:54,489 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 29 [2023-04-01 10:56:54,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:56:54,490 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-04-01 10:56:54,490 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) [2023-04-01 10:56:54,491 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-04-01 10:56:54,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-04-01 10:56:54,492 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:56:54,492 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] [2023-04-01 10:56:54,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:56:54,493 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:56:54,493 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:56:54,493 INFO L85 PathProgramCache]: Analyzing trace with hash 519244691, now seen corresponding path program 1 times [2023-04-01 10:56:54,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:56:54,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146600700] [2023-04-01 10:56:54,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:56:54,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:56:55,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:57:07,929 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 10:57:07,930 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:57:07,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146600700] [2023-04-01 10:57:07,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146600700] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:57:07,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128456050] [2023-04-01 10:57:07,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:57:07,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:57:07,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:57:07,935 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 10:57:07,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 10:57:08,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:57:08,425 INFO L262 TraceCheckSpWp]: Trace formula consists of 728 conjuncts, 196 conjunts are in the unsatisfiable core [2023-04-01 10:57:08,441 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:57:08,602 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 6 treesize of output 5 [2023-04-01 10:57:08,810 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2023-04-01 10:57:08,907 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 [2023-04-01 10:57:08,996 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-04-01 10:57:08,996 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-04-01 10:57:09,098 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2023-04-01 10:57:09,104 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 [2023-04-01 10:57:09,124 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2023-04-01 10:57:09,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 10:57:09,221 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 [2023-04-01 10:57:09,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 10:57:09,230 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 [2023-04-01 10:57:09,235 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 [2023-04-01 10:57:09,244 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 [2023-04-01 10:57:09,569 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 10:57:09,570 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 88 treesize of output 39 [2023-04-01 10:57:09,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 10:57:09,583 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2023-04-01 10:57:09,588 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