/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/forester-heap/sll-rb-cnstr_1-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:51:18,754 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:51:18,756 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:51:18,797 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:51:18,797 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:51:18,798 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:51:18,799 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:51:18,800 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:51:18,801 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:51:18,802 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:51:18,803 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:51:18,804 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:51:18,804 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:51:18,805 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:51:18,806 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:51:18,806 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:51:18,807 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:51:18,808 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:51:18,809 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:51:18,811 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:51:18,812 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:51:18,813 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:51:18,814 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:51:18,815 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:51:18,818 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:51:18,819 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:51:18,819 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:51:18,820 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:51:18,820 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:51:18,821 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:51:18,821 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:51:18,822 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:51:18,823 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:51:18,823 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:51:18,824 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:51:18,825 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:51:18,827 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:51:18,828 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:51:18,828 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:51:18,830 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:51:18,830 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:51:18,831 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 22:51:18,852 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:51:18,852 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:51:18,853 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:51:18,853 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:51:18,854 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:51:18,854 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:51:18,854 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:51:18,855 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:51:18,855 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:51:18,855 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:51:18,855 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:51:18,856 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:51:18,856 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:51:18,856 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:51:18,856 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:51:18,857 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:51:18,857 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:51:18,857 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:51:18,858 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:51:18,858 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:51:18,858 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:51:18,859 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:51:18,859 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:51:18,859 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:51:18,859 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:51:18,860 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:51:18,860 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:51:18,860 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:51:18,860 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:51:18,861 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:51:18,861 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:51:18,861 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:51:18,861 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:51:18,861 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:51:18,862 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:51:18,862 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:51:18,862 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:51:18,862 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:51:18,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:51:18,863 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:51:18,863 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:51:18,863 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:51:19,085 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:51:19,111 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:51:19,113 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:51:19,114 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:51:19,116 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:51:19,118 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i [2023-03-31 22:51:20,227 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:51:20,429 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:51:20,429 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i [2023-03-31 22:51:20,439 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87f42427e/7cd30480e34247b6bcac81d410dbae10/FLAGbc47c97a7 [2023-03-31 22:51:20,453 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/87f42427e/7cd30480e34247b6bcac81d410dbae10 [2023-03-31 22:51:20,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:51:20,457 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:51:20,458 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:51:20,458 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:51:20,461 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:51:20,462 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:51:20" (1/1) ... [2023-03-31 22:51:20,463 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c492b4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:51:20, skipping insertion in model container [2023-03-31 22:51:20,463 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:51:20" (1/1) ... [2023-03-31 22:51:20,468 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:51:20,502 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:51:20,733 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/forester-heap/sll-rb-cnstr_1-2.i[22480,22493] [2023-03-31 22:51:20,738 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/forester-heap/sll-rb-cnstr_1-2.i[22552,22565] [2023-03-31 22:51:20,741 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/forester-heap/sll-rb-cnstr_1-2.i[22720,22733] [2023-03-31 22:51:20,750 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:51:20,762 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:51:20,803 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/forester-heap/sll-rb-cnstr_1-2.i[22480,22493] [2023-03-31 22:51:20,804 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/forester-heap/sll-rb-cnstr_1-2.i[22552,22565] [2023-03-31 22:51:20,806 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/forester-heap/sll-rb-cnstr_1-2.i[22720,22733] [2023-03-31 22:51:20,808 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:51:20,833 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:51:20,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:51:20 WrapperNode [2023-03-31 22:51:20,834 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:51:20,835 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:51:20,835 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:51:20,835 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:51:20,845 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:51:20" (1/1) ... [2023-03-31 22:51:20,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:51:20" (1/1) ... [2023-03-31 22:51:20,855 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:51:20" (1/1) ... [2023-03-31 22:51:20,856 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:51:20" (1/1) ... [2023-03-31 22:51:20,868 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:51:20" (1/1) ... [2023-03-31 22:51:20,878 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:51:20" (1/1) ... [2023-03-31 22:51:20,881 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:51:20" (1/1) ... [2023-03-31 22:51:20,882 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:51:20" (1/1) ... [2023-03-31 22:51:20,888 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:51:20,889 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:51:20,889 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:51:20,889 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:51:20,890 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:51:20" (1/1) ... [2023-03-31 22:51:20,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:51:20,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:51:20,921 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 22:51:20,923 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 22:51:20,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:51:20,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:51:20,953 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:51:20,953 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:51:20,953 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-03-31 22:51:20,953 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-03-31 22:51:20,954 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-03-31 22:51:20,954 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-03-31 22:51:20,954 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-03-31 22:51:20,954 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-03-31 22:51:20,954 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-03-31 22:51:20,955 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-03-31 22:51:20,955 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-03-31 22:51:20,955 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-03-31 22:51:20,955 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-03-31 22:51:20,955 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-03-31 22:51:20,955 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-03-31 22:51:20,955 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-03-31 22:51:20,955 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-03-31 22:51:20,955 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-03-31 22:51:20,956 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-03-31 22:51:20,956 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-03-31 22:51:20,956 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-03-31 22:51:20,957 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-03-31 22:51:20,957 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-03-31 22:51:20,957 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-03-31 22:51:20,957 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-03-31 22:51:20,957 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-03-31 22:51:20,957 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-03-31 22:51:20,957 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-03-31 22:51:20,957 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-03-31 22:51:20,957 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-03-31 22:51:20,958 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-03-31 22:51:20,958 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-03-31 22:51:20,958 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-03-31 22:51:20,958 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-03-31 22:51:20,958 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-03-31 22:51:20,959 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-03-31 22:51:20,959 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-03-31 22:51:20,959 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-03-31 22:51:20,960 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-03-31 22:51:20,961 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-03-31 22:51:20,961 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-03-31 22:51:20,961 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-03-31 22:51:20,961 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-03-31 22:51:20,961 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-03-31 22:51:20,961 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-03-31 22:51:20,962 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-03-31 22:51:20,962 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-03-31 22:51:20,962 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-03-31 22:51:20,962 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-03-31 22:51:20,963 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-03-31 22:51:20,963 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-03-31 22:51:20,963 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-03-31 22:51:20,963 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-03-31 22:51:20,964 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-03-31 22:51:20,964 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-03-31 22:51:20,964 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-03-31 22:51:20,964 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-03-31 22:51:20,964 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-03-31 22:51:20,965 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-03-31 22:51:20,965 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-03-31 22:51:20,965 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2023-03-31 22:51:20,965 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:51:20,965 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-03-31 22:51:20,965 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2023-03-31 22:51:20,965 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-03-31 22:51:20,965 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:51:20,965 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2023-03-31 22:51:20,965 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-03-31 22:51:20,966 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-03-31 22:51:20,966 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-03-31 22:51:20,966 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-03-31 22:51:20,966 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-03-31 22:51:20,966 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-03-31 22:51:20,966 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-03-31 22:51:20,966 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-03-31 22:51:20,966 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-03-31 22:51:20,966 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-03-31 22:51:20,967 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-03-31 22:51:20,967 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-03-31 22:51:20,967 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-03-31 22:51:20,967 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-03-31 22:51:20,967 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-03-31 22:51:20,967 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-03-31 22:51:20,968 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-03-31 22:51:20,968 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-03-31 22:51:20,968 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-03-31 22:51:20,968 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-03-31 22:51:20,968 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-03-31 22:51:20,968 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-03-31 22:51:20,968 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-03-31 22:51:20,968 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-03-31 22:51:20,968 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-03-31 22:51:20,969 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-03-31 22:51:20,969 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-03-31 22:51:20,969 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-03-31 22:51:20,969 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-03-31 22:51:20,969 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-03-31 22:51:20,969 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-03-31 22:51:20,969 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-03-31 22:51:20,969 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-03-31 22:51:20,970 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-03-31 22:51:20,970 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-03-31 22:51:20,970 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-03-31 22:51:20,970 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-03-31 22:51:20,970 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-03-31 22:51:20,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:51:20,970 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:51:20,970 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-31 22:51:20,971 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-31 22:51:20,971 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:51:20,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:51:20,971 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:51:20,971 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-31 22:51:20,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-03-31 22:51:20,972 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:51:20,973 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-03-31 22:51:20,975 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:51:20,975 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:51:20,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:51:20,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:51:20,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:51:21,254 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:51:21,255 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:51:21,425 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:51:21,492 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:51:21,492 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-03-31 22:51:21,494 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:51:21 BoogieIcfgContainer [2023-03-31 22:51:21,495 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:51:21,497 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:51:21,497 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:51:21,500 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:51:21,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:51:20" (1/3) ... [2023-03-31 22:51:21,500 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6674415c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:51:21, skipping insertion in model container [2023-03-31 22:51:21,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:51:20" (2/3) ... [2023-03-31 22:51:21,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6674415c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:51:21, skipping insertion in model container [2023-03-31 22:51:21,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:51:21" (3/3) ... [2023-03-31 22:51:21,502 INFO L112 eAbstractionObserver]: Analyzing ICFG sll-rb-cnstr_1-2.i [2023-03-31 22:51:21,517 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:51:21,517 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2023-03-31 22:51:21,562 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:51:21,568 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;@469366c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:51:21,569 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-03-31 22:51:21,592 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.8) internal successors, (36), 23 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-03-31 22:51:21,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-03-31 22:51:21,600 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:51:21,600 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:51:21,601 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:51:21,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:51:21,609 INFO L85 PathProgramCache]: Analyzing trace with hash -908072507, now seen corresponding path program 1 times [2023-03-31 22:51:21,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:51:21,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294900299] [2023-03-31 22:51:21,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:51:21,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:51:21,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:51:21,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:51:21,810 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:51:21,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294900299] [2023-03-31 22:51:21,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294900299] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:51:21,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:51:21,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-03-31 22:51:21,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382404090] [2023-03-31 22:51:21,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:51:21,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-03-31 22:51:21,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:51:21,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-03-31 22:51:21,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 22:51:21,863 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.8) internal successors, (36), 23 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:51:21,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:51:21,925 INFO L93 Difference]: Finished difference Result 49 states and 71 transitions. [2023-03-31 22:51:21,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-03-31 22:51:21,928 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2023-03-31 22:51:21,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:51:21,937 INFO L225 Difference]: With dead ends: 49 [2023-03-31 22:51:21,938 INFO L226 Difference]: Without dead ends: 24 [2023-03-31 22:51:21,941 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 22:51:21,946 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:51:21,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 22:51:21,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-03-31 22:51:21,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-03-31 22:51:21,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 20 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:51:21,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2023-03-31 22:51:21,982 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 9 [2023-03-31 22:51:21,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:51:21,984 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2023-03-31 22:51:21,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:51:21,985 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2023-03-31 22:51:21,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-03-31 22:51:21,986 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:51:21,986 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:51:21,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:51:21,986 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:51:21,988 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:51:21,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1902154329, now seen corresponding path program 1 times [2023-03-31 22:51:21,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:51:21,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047000699] [2023-03-31 22:51:21,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:51:21,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:51:22,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:51:22,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:51:22,143 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:51:22,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047000699] [2023-03-31 22:51:22,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047000699] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:51:22,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:51:22,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-03-31 22:51:22,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103028040] [2023-03-31 22:51:22,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:51:22,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-03-31 22:51:22,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:51:22,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-03-31 22:51:22,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-03-31 22:51:22,145 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:51:22,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:51:22,204 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2023-03-31 22:51:22,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-03-31 22:51:22,205 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2023-03-31 22:51:22,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:51:22,205 INFO L225 Difference]: With dead ends: 25 [2023-03-31 22:51:22,205 INFO L226 Difference]: Without dead ends: 23 [2023-03-31 22:51:22,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:51:22,208 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 26 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:51:22,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 27 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 22:51:22,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-03-31 22:51:22,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2023-03-31 22:51:22,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:51:22,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2023-03-31 22:51:22,220 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 10 [2023-03-31 22:51:22,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:51:22,221 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2023-03-31 22:51:22,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:51:22,221 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2023-03-31 22:51:22,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-03-31 22:51:22,221 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:51:22,221 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:51:22,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-03-31 22:51:22,222 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:51:22,224 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:51:22,224 INFO L85 PathProgramCache]: Analyzing trace with hash -714935817, now seen corresponding path program 1 times [2023-03-31 22:51:22,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:51:22,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605245611] [2023-03-31 22:51:22,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:51:22,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:51:22,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:51:22,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:51:22,417 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:51:22,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605245611] [2023-03-31 22:51:22,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605245611] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:51:22,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:51:22,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:51:22,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249361894] [2023-03-31 22:51:22,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:51:22,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:51:22,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:51:22,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:51:22,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:51:22,419 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:51:22,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:51:22,512 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2023-03-31 22:51:22,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-03-31 22:51:22,513 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2023-03-31 22:51:22,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:51:22,513 INFO L225 Difference]: With dead ends: 46 [2023-03-31 22:51:22,514 INFO L226 Difference]: Without dead ends: 44 [2023-03-31 22:51:22,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-03-31 22:51:22,515 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 32 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:51:22,516 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 60 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 22:51:22,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-03-31 22:51:22,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2023-03-31 22:51:22,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 25 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:51:22,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2023-03-31 22:51:22,522 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 13 [2023-03-31 22:51:22,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:51:22,523 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2023-03-31 22:51:22,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:51:22,523 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2023-03-31 22:51:22,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-03-31 22:51:22,524 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:51:22,524 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:51:22,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:51:22,524 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:51:22,524 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:51:22,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1416205996, now seen corresponding path program 1 times [2023-03-31 22:51:22,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:51:22,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111090533] [2023-03-31 22:51:22,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:51:22,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:51:22,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:51:23,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:51:23,338 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:51:23,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111090533] [2023-03-31 22:51:23,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111090533] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:51:23,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160921146] [2023-03-31 22:51:23,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:51:23,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:51:23,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:51:23,345 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 22:51:23,352 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 22:51:23,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:51:23,523 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 26 conjunts are in the unsatisfiable core [2023-03-31 22:51:23,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:51:23,607 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-03-31 22:51:23,613 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 22:51:23,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:51:23,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 170 treesize of output 202 [2023-03-31 22:51:23,930 INFO L321 Elim1Store]: treesize reduction 82, result has 29.9 percent of original size [2023-03-31 22:51:23,933 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 179 treesize of output 226 [2023-03-31 22:51:24,000 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 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 151 treesize of output 183 [2023-03-31 22:51:24,039 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 147 treesize of output 141 [2023-03-31 22:51:24,072 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 131 treesize of output 151 [2023-03-31 22:51:24,143 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-03-31 22:51:24,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 141 [2023-03-31 22:51:24,310 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 67 [2023-03-31 22:51:24,376 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-03-31 22:51:24,376 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 2 case distinctions, treesize of input 21 treesize of output 5 [2023-03-31 22:51:24,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 64 [2023-03-31 22:51:24,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:51:24,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-03-31 22:51:24,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:51:24,602 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:51:24,721 INFO L321 Elim1Store]: treesize reduction 20, result has 63.6 percent of original size [2023-03-31 22:51:24,722 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 191 treesize of output 238 [2023-03-31 22:51:24,778 INFO L321 Elim1Store]: treesize reduction 20, result has 63.6 percent of original size [2023-03-31 22:51:24,778 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 179 treesize of output 226 [2023-03-31 22:51:24,830 INFO L321 Elim1Store]: treesize reduction 10, result has 70.6 percent of original size [2023-03-31 22:51:24,830 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 167 treesize of output 196 [2023-03-31 22:51:25,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:51:25,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160921146] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:51:25,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1903391074] [2023-03-31 22:51:25,156 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2023-03-31 22:51:25,156 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:51:25,159 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:51:25,164 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:51:25,164 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:51:25,220 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 23 for LOIs [2023-03-31 22:51:25,432 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 22:51:25,436 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:51:25,666 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '411#(and (= main_~list~0.base main_~end~0.base) (= main_~end~0.offset 0) (not (= main_~end~0.base 0)) (= main_~list~0.offset 0) (not (= 1 (select (select |#memory_int| main_~end~0.base) 4))) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 22:51:25,666 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:51:25,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 22:51:25,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-03-31 22:51:25,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757791935] [2023-03-31 22:51:25,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 22:51:25,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-03-31 22:51:25,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:51:25,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-03-31 22:51:25,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2023-03-31 22:51:25,668 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:51:25,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:51:25,896 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2023-03-31 22:51:25,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:51:25,898 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-03-31 22:51:25,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:51:25,899 INFO L225 Difference]: With dead ends: 44 [2023-03-31 22:51:25,899 INFO L226 Difference]: Without dead ends: 42 [2023-03-31 22:51:25,900 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=411, Unknown=1, NotChecked=0, Total=506 [2023-03-31 22:51:25,901 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 95 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:51:25,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 52 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 22:51:25,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-03-31 22:51:25,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 20. [2023-03-31 22:51:25,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:51:25,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2023-03-31 22:51:25,910 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2023-03-31 22:51:25,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:51:25,910 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2023-03-31 22:51:25,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 10 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-03-31 22:51:25,911 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2023-03-31 22:51:25,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-03-31 22:51:25,911 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:51:25,912 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:51:25,919 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-03-31 22:51:26,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:51:26,119 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr2ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:51:26,119 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:51:26,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1383028028, now seen corresponding path program 1 times [2023-03-31 22:51:26,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:51:26,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16613801] [2023-03-31 22:51:26,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:51:26,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:51:26,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-03-31 22:51:26,133 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-03-31 22:51:26,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-03-31 22:51:26,163 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-03-31 22:51:26,164 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-03-31 22:51:26,165 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location mainErr2ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-03-31 22:51:26,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2023-03-31 22:51:26,166 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location mainErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2023-03-31 22:51:26,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-03-31 22:51:26,169 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-03-31 22:51:26,173 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-03-31 22:51:26,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.03 10:51:26 BoogieIcfgContainer [2023-03-31 22:51:26,189 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-03-31 22:51:26,189 INFO L158 Benchmark]: Toolchain (without parser) took 5732.32ms. Allocated memory was 327.2MB in the beginning and 393.2MB in the end (delta: 66.1MB). Free memory was 280.2MB in the beginning and 226.5MB in the end (delta: 53.8MB). Peak memory consumption was 121.1MB. Max. memory is 8.0GB. [2023-03-31 22:51:26,189 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 187.7MB. Free memory is still 138.2MB. There was no memory consumed. Max. memory is 8.0GB. [2023-03-31 22:51:26,190 INFO L158 Benchmark]: CACSL2BoogieTranslator took 376.10ms. Allocated memory is still 327.2MB. Free memory was 280.2MB in the beginning and 262.4MB in the end (delta: 17.8MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. [2023-03-31 22:51:26,190 INFO L158 Benchmark]: Boogie Preprocessor took 53.33ms. Allocated memory is still 327.2MB. Free memory was 262.4MB in the beginning and 259.6MB in the end (delta: 2.8MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. [2023-03-31 22:51:26,190 INFO L158 Benchmark]: RCFGBuilder took 605.56ms. Allocated memory is still 327.2MB. Free memory was 259.6MB in the beginning and 230.7MB in the end (delta: 29.0MB). Peak memory consumption was 28.3MB. Max. memory is 8.0GB. [2023-03-31 22:51:26,191 INFO L158 Benchmark]: TraceAbstraction took 4692.20ms. Allocated memory was 327.2MB in the beginning and 393.2MB in the end (delta: 66.1MB). Free memory was 229.9MB in the beginning and 226.5MB in the end (delta: 3.5MB). Peak memory consumption was 70.8MB. Max. memory is 8.0GB. [2023-03-31 22:51:26,194 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 187.7MB. Free memory is still 138.2MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 376.10ms. Allocated memory is still 327.2MB. Free memory was 280.2MB in the beginning and 262.4MB in the end (delta: 17.8MB). Peak memory consumption was 17.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 53.33ms. Allocated memory is still 327.2MB. Free memory was 262.4MB in the beginning and 259.6MB in the end (delta: 2.8MB). Peak memory consumption was 3.1MB. Max. memory is 8.0GB. * RCFGBuilder took 605.56ms. Allocated memory is still 327.2MB. Free memory was 259.6MB in the beginning and 230.7MB in the end (delta: 29.0MB). Peak memory consumption was 28.3MB. Max. memory is 8.0GB. * TraceAbstraction took 4692.20ms. Allocated memory was 327.2MB in the beginning and 393.2MB in the end (delta: 66.1MB). Free memory was 229.9MB in the beginning and 226.5MB in the end (delta: 3.5MB). Peak memory consumption was 70.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 1049]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L1006] SLL* list = malloc(sizeof(SLL)); [L1007] list->next = ((void*)0) [L1008] list->colour = BLACK [L1010] SLL* end = list; VAL [end={-1:0}, list={-1:0}] [L1013] COND FALSE !(__VERIFIER_nondet_int()) [L1034] end = ((void*)0) [L1035] end = list VAL [end={-1:0}, list={-1:0}] [L1038] COND FALSE !(!(((void*)0) != end)) VAL [end={-1:0}, list={-1:0}] [L1039] EXPR end->colour VAL [end->colour=1, end={-1:0}, list={-1:0}] [L1039] COND FALSE !(!(BLACK == end->colour)) [L1041] COND TRUE ((void*)0) != end [L1043] EXPR end->colour [L1043] COND FALSE !(RED == end->colour) [L1049] EXPR end->next VAL [end->next={0:0}, end->next={53:55}, end->next={54:51}, end={-1:0}, list={-1:0}] [L1049] COND TRUE !(end->next) [L1049] reach_error() VAL [end->next={53:55}, end->next={54:51}, end={-1:0}, list={-1:0}] - UnprovableResult [Line: 1038]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1039]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 30 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 4.6s, OverallIterations: 5, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 153 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 153 mSDsluCounter, 163 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 96 mSDsCounter, 22 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 85 IncrementalHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 22 mSolverCounterUnsat, 67 mSDtfsCounter, 85 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=3, InterpolantAutomatonStates: 19, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 4 MinimizatonAttempts, 38 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.7s InterpolantComputationTime, 79 NumberOfCodeBlocks, 79 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 71 ConstructedInterpolants, 2 QuantifiedInterpolants, 545 SizeOfPredicates, 25 NumberOfNonLiveVariables, 202 ConjunctsInSsa, 26 ConjunctsInUnsatCore, 6 InterpolantComputations, 3 PerfectInterpolantSequences, 0/6 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-03-31 22:51:26,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...