/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:56:55,823 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:56:55,824 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:56:55,859 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:56:55,859 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:56:55,865 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:56:55,870 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:56:55,873 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:56:55,874 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:56:55,879 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:56:55,880 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:56:55,882 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:56:55,882 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:56:55,886 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:56:55,886 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:56:55,887 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:56:55,888 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:56:55,889 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:56:55,891 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:56:55,895 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:56:55,896 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:56:55,897 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:56:55,898 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:56:55,899 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:56:55,907 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:56:55,907 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:56:55,907 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:56:55,909 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:56:55,909 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:56:55,910 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:56:55,910 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:56:55,911 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:56:55,912 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:56:55,913 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:56:55,913 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:56:55,914 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:56:55,914 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:56:55,914 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:56:55,914 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:56:55,915 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:56:55,915 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:56:55,917 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 22:56:55,941 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:56:55,941 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:56:55,941 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:56:55,941 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:56:55,942 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:56:55,942 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:56:55,942 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:56:55,942 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:56:55,942 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:56:55,943 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:56:55,943 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:56:55,943 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:56:55,943 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:56:55,943 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:56:55,943 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:56:55,943 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:56:55,943 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:56:55,944 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:56:55,944 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:56:55,944 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:56:55,944 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:56:55,944 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:56:55,945 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:56:55,945 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:56:55,945 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:56:55,945 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:56:55,945 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:56:55,945 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:56:55,945 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:56:55,945 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:56:55,946 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:56:55,946 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:56:55,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:56:55,946 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:56:55,946 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:56:55,946 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:56:55,946 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:56:55,947 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:56:55,947 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:56:55,947 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:56:55,947 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:56:55,947 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:56:56,167 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:56:56,184 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:56:56,186 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:56:56,187 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:56:56,188 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:56:56,189 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i [2023-03-31 22:56:57,287 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:56:57,532 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:56:57,533 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i [2023-03-31 22:56:57,543 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee42a2740/3ced511043d74a5ab71f0c6f32661aec/FLAG7345d8737 [2023-03-31 22:56:57,554 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee42a2740/3ced511043d74a5ab71f0c6f32661aec [2023-03-31 22:56:57,555 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:56:57,556 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:56:57,557 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:56:57,558 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:56:57,560 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:56:57,561 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:56:57" (1/1) ... [2023-03-31 22:56:57,562 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c912c7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:57, skipping insertion in model container [2023-03-31 22:56:57,562 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:56:57" (1/1) ... [2023-03-31 22:56:57,567 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:56:57,597 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:56:57,874 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i[24494,24507] [2023-03-31 22:56:57,880 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:56:57,890 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:56:57,946 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/sll_nondet_insert-2.i[24494,24507] [2023-03-31 22:56:57,948 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:56:57,977 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:56:57,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:57 WrapperNode [2023-03-31 22:56:57,977 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:56:57,978 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:56:57,978 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:56:57,979 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:56:57,988 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:57" (1/1) ... [2023-03-31 22:56:57,989 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:57" (1/1) ... [2023-03-31 22:56:58,014 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:57" (1/1) ... [2023-03-31 22:56:58,015 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:57" (1/1) ... [2023-03-31 22:56:58,028 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:57" (1/1) ... [2023-03-31 22:56:58,031 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:57" (1/1) ... [2023-03-31 22:56:58,034 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:57" (1/1) ... [2023-03-31 22:56:58,035 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:57" (1/1) ... [2023-03-31 22:56:58,043 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:56:58,044 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:56:58,044 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:56:58,044 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:56:58,045 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:57" (1/1) ... [2023-03-31 22:56:58,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:56:58,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:56:58,069 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 22:56:58,073 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 22:56:58,106 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:56:58,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:56:58,109 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:56:58,112 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2023-03-31 22:56:58,115 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2023-03-31 22:56:58,115 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-03-31 22:56:58,115 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2023-03-31 22:56:58,115 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2023-03-31 22:56:58,115 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2023-03-31 22:56:58,116 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_insert [2023-03-31 22:56:58,116 INFO L138 BoogieDeclarations]: Found implementation of procedure _get_nondet_int [2023-03-31 22:56:58,116 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:56:58,116 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:56:58,116 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:56:58,116 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-31 22:56:58,116 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-31 22:56:58,117 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:56:58,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:56:58,117 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2023-03-31 22:56:58,117 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2023-03-31 22:56:58,117 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2023-03-31 22:56:58,117 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-03-31 22:56:58,117 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-03-31 22:56:58,117 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-03-31 22:56:58,117 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-03-31 22:56:58,118 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-03-31 22:56:58,118 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-03-31 22:56:58,118 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-03-31 22:56:58,118 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-03-31 22:56:58,118 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-03-31 22:56:58,118 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-03-31 22:56:58,118 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-03-31 22:56:58,118 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-03-31 22:56:58,119 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-03-31 22:56:58,119 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-03-31 22:56:58,119 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-03-31 22:56:58,119 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-03-31 22:56:58,119 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-03-31 22:56:58,119 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-03-31 22:56:58,119 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-03-31 22:56:58,120 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-03-31 22:56:58,120 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-03-31 22:56:58,121 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-03-31 22:56:58,121 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-03-31 22:56:58,121 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-03-31 22:56:58,122 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-03-31 22:56:58,122 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-03-31 22:56:58,122 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-03-31 22:56:58,123 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-03-31 22:56:58,123 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-03-31 22:56:58,123 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-03-31 22:56:58,123 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-03-31 22:56:58,123 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-03-31 22:56:58,123 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-03-31 22:56:58,124 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-03-31 22:56:58,124 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-03-31 22:56:58,124 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-03-31 22:56:58,124 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-03-31 22:56:58,124 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-03-31 22:56:58,125 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-03-31 22:56:58,125 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-03-31 22:56:58,125 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-03-31 22:56:58,126 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-03-31 22:56:58,126 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-03-31 22:56:58,126 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-03-31 22:56:58,126 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-03-31 22:56:58,126 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-03-31 22:56:58,126 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-03-31 22:56:58,126 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-03-31 22:56:58,126 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-03-31 22:56:58,126 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-03-31 22:56:58,126 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-03-31 22:56:58,127 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-03-31 22:56:58,127 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-03-31 22:56:58,127 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-03-31 22:56:58,127 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-03-31 22:56:58,127 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-03-31 22:56:58,127 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-03-31 22:56:58,127 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-03-31 22:56:58,127 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2023-03-31 22:56:58,127 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-03-31 22:56:58,127 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2023-03-31 22:56:58,128 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-03-31 22:56:58,128 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:56:58,128 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2023-03-31 22:56:58,128 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-03-31 22:56:58,128 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-03-31 22:56:58,128 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-03-31 22:56:58,128 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-03-31 22:56:58,128 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-03-31 22:56:58,129 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-03-31 22:56:58,129 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-03-31 22:56:58,129 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-03-31 22:56:58,129 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-03-31 22:56:58,129 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-03-31 22:56:58,129 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-03-31 22:56:58,129 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-03-31 22:56:58,129 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-03-31 22:56:58,130 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-03-31 22:56:58,130 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-03-31 22:56:58,130 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-03-31 22:56:58,130 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-03-31 22:56:58,130 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-03-31 22:56:58,130 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-03-31 22:56:58,130 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-03-31 22:56:58,130 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-03-31 22:56:58,131 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-03-31 22:56:58,131 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-03-31 22:56:58,131 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-03-31 22:56:58,131 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-03-31 22:56:58,131 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-03-31 22:56:58,131 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-03-31 22:56:58,133 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-03-31 22:56:58,133 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-03-31 22:56:58,133 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-03-31 22:56:58,133 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-03-31 22:56:58,133 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-03-31 22:56:58,133 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-03-31 22:56:58,134 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-03-31 22:56:58,134 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-03-31 22:56:58,134 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-03-31 22:56:58,134 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-03-31 22:56:58,134 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-03-31 22:56:58,134 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-03-31 22:56:58,134 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2023-03-31 22:56:58,134 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-31 22:56:58,134 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-03-31 22:56:58,134 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2023-03-31 22:56:58,134 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-03-31 22:56:58,135 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2023-03-31 22:56:58,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:56:58,137 INFO L130 BoogieDeclarations]: Found specification of procedure sll_insert [2023-03-31 22:56:58,137 INFO L130 BoogieDeclarations]: Found specification of procedure _get_nondet_int [2023-03-31 22:56:58,137 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:56:58,137 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 22:56:58,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-03-31 22:56:58,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:56:58,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:56:58,138 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:56:58,138 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:56:58,138 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:56:58,336 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:56:58,338 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:56:58,383 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-03-31 22:56:58,588 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:56:58,672 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:56:58,672 INFO L302 CfgBuilder]: Removed 6 assume(true) statements. [2023-03-31 22:56:58,675 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:56:58 BoogieIcfgContainer [2023-03-31 22:56:58,675 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:56:58,676 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:56:58,677 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:56:58,679 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:56:58,679 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:56:57" (1/3) ... [2023-03-31 22:56:58,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@130797c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:56:58, skipping insertion in model container [2023-03-31 22:56:58,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:56:57" (2/3) ... [2023-03-31 22:56:58,680 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@130797c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:56:58, skipping insertion in model container [2023-03-31 22:56:58,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:56:58" (3/3) ... [2023-03-31 22:56:58,689 INFO L112 eAbstractionObserver]: Analyzing ICFG sll_nondet_insert-2.i [2023-03-31 22:56:58,704 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:56:58,705 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:56:58,763 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:56:58,769 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;@8dfff1e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:56:58,770 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:56:58,773 INFO L276 IsEmpty]: Start isEmpty. Operand has 55 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 37 states have internal predecessors, (48), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-03-31 22:56:58,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-03-31 22:56:58,781 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:56:58,782 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, 1] [2023-03-31 22:56:58,783 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:56:58,789 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:56:58,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1373249684, now seen corresponding path program 1 times [2023-03-31 22:56:58,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:56:58,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015560174] [2023-03-31 22:56:58,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:56:58,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:56:58,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:56:59,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 22:56:59,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:56:59,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015560174] [2023-03-31 22:56:59,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015560174] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:56:59,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986570558] [2023-03-31 22:56:59,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:56:59,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:56:59,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:56:59,017 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 22:56:59,046 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 22:56:59,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:56:59,219 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 1 conjunts are in the unsatisfiable core [2023-03-31 22:56:59,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:56:59,237 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 22:56:59,238 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:56:59,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986570558] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:56:59,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:56:59,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2023-03-31 22:56:59,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312906819] [2023-03-31 22:56:59,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:56:59,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-03-31 22:56:59,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:56:59,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-03-31 22:56:59,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-03-31 22:56:59,283 INFO L87 Difference]: Start difference. First operand has 55 states, 35 states have (on average 1.3714285714285714) internal successors, (48), 37 states have internal predecessors, (48), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-31 22:56:59,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:56:59,336 INFO L93 Difference]: Finished difference Result 105 states and 135 transitions. [2023-03-31 22:56:59,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-03-31 22:56:59,340 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 30 [2023-03-31 22:56:59,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:56:59,345 INFO L225 Difference]: With dead ends: 105 [2023-03-31 22:56:59,345 INFO L226 Difference]: Without dead ends: 42 [2023-03-31 22:56:59,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 31 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 22:56:59,353 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-03-31 22:56:59,354 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 56 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-03-31 22:56:59,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-03-31 22:56:59,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2023-03-31 22:56:59,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-03-31 22:56:59,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2023-03-31 22:56:59,393 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 30 [2023-03-31 22:56:59,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:56:59,394 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2023-03-31 22:56:59,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-03-31 22:56:59,394 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2023-03-31 22:56:59,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-03-31 22:56:59,397 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:56:59,397 INFO L195 NwaCegarLoop]: trace histogram [2, 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, 1, 1] [2023-03-31 22:56:59,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-03-31 22:56:59,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-03-31 22:56:59,604 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:56:59,604 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:56:59,604 INFO L85 PathProgramCache]: Analyzing trace with hash 310550338, now seen corresponding path program 1 times [2023-03-31 22:56:59,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:56:59,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124046714] [2023-03-31 22:56:59,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:56:59,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:56:59,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:56:59,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 22:56:59,928 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:56:59,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124046714] [2023-03-31 22:56:59,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124046714] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:56:59,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826000358] [2023-03-31 22:56:59,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:56:59,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:56:59,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:56:59,937 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:56:59,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-03-31 22:57:00,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:57:00,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 10 conjunts are in the unsatisfiable core [2023-03-31 22:57:00,091 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:57:00,264 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:57:00,264 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-03-31 22:57:00,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826000358] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:57:00,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-03-31 22:57:00,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 16 [2023-03-31 22:57:00,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885508321] [2023-03-31 22:57:00,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:57:00,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-03-31 22:57:00,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:57:00,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-03-31 22:57:00,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2023-03-31 22:57:00,267 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-31 22:57:00,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:57:00,412 INFO L93 Difference]: Finished difference Result 74 states and 85 transitions. [2023-03-31 22:57:00,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-03-31 22:57:00,414 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 33 [2023-03-31 22:57:00,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:57:00,415 INFO L225 Difference]: With dead ends: 74 [2023-03-31 22:57:00,415 INFO L226 Difference]: Without dead ends: 44 [2023-03-31 22:57:00,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2023-03-31 22:57:00,417 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 10 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:57:00,417 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 218 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 22:57:00,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-03-31 22:57:00,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-03-31 22:57:00,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-03-31 22:57:00,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2023-03-31 22:57:00,424 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 33 [2023-03-31 22:57:00,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:57:00,427 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2023-03-31 22:57:00,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.142857142857143) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-31 22:57:00,428 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2023-03-31 22:57:00,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-03-31 22:57:00,429 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:57:00,430 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1] [2023-03-31 22:57:00,438 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-03-31 22:57:00,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-03-31 22:57:00,636 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:57:00,637 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:57:00,637 INFO L85 PathProgramCache]: Analyzing trace with hash 2013520489, now seen corresponding path program 1 times [2023-03-31 22:57:00,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:57:00,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784307283] [2023-03-31 22:57:00,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:57:00,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:57:00,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:57:00,914 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-31 22:57:00,914 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:57:00,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784307283] [2023-03-31 22:57:00,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784307283] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:57:00,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:57:00,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-03-31 22:57:00,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2260192] [2023-03-31 22:57:00,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:57:00,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-03-31 22:57:00,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:57:00,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-03-31 22:57:00,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-03-31 22:57:00,920 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 10 states, 7 states have (on average 3.142857142857143) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-31 22:57:01,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:57:01,077 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2023-03-31 22:57:01,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-31 22:57:01,077 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 3.142857142857143) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) Word has length 37 [2023-03-31 22:57:01,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:57:01,082 INFO L225 Difference]: With dead ends: 61 [2023-03-31 22:57:01,082 INFO L226 Difference]: Without dead ends: 57 [2023-03-31 22:57:01,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-03-31 22:57:01,085 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 15 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:57:01,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 312 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 22:57:01,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-03-31 22:57:01,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2023-03-31 22:57:01,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 32 states have (on average 1.21875) internal successors, (39), 34 states have internal predecessors, (39), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2023-03-31 22:57:01,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2023-03-31 22:57:01,103 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 37 [2023-03-31 22:57:01,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:57:01,104 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2023-03-31 22:57:01,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 3.142857142857143) internal successors, (22), 9 states have internal predecessors, (22), 3 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2023-03-31 22:57:01,104 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2023-03-31 22:57:01,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-03-31 22:57:01,105 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:57:01,105 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1] [2023-03-31 22:57:01,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:57:01,105 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:57:01,105 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:57:01,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1971480628, now seen corresponding path program 1 times [2023-03-31 22:57:01,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:57:01,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903658002] [2023-03-31 22:57:01,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:57:01,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:57:01,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:57:01,373 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 22:57:01,374 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:57:01,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903658002] [2023-03-31 22:57:01,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903658002] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:57:01,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849934827] [2023-03-31 22:57:01,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:57:01,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:57:01,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:57:01,377 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:57:01,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-03-31 22:57:01,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:57:01,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 12 conjunts are in the unsatisfiable core [2023-03-31 22:57:01,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:57:01,626 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-03-31 22:57:01,626 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:57:01,852 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-03-31 22:57:01,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849934827] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:57:01,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1281259378] [2023-03-31 22:57:01,872 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2023-03-31 22:57:01,872 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:57:01,875 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:57:01,879 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:57:01,879 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:57:01,935 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 23 for LOIs [2023-03-31 22:57:02,334 INFO L197 IcfgInterpreter]: Interpreting procedure sll_length with input of size 22 for LOIs [2023-03-31 22:57:02,353 INFO L197 IcfgInterpreter]: Interpreting procedure sll_create with input of size 42 for LOIs [2023-03-31 22:57:02,454 INFO L197 IcfgInterpreter]: Interpreting procedure _get_nondet_int with input of size 19 for LOIs [2023-03-31 22:57:02,501 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 22:57:02,505 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:57:03,759 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1072#(and (<= 0 |main_~#s~0.base|) (= |main_~#s~0.offset| 0) (= main_~k~0 0) (= main_~len~2 2) (= main_~i~0 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 22:57:03,759 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:57:03,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 22:57:03,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 24 [2023-03-31 22:57:03,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304321946] [2023-03-31 22:57:03,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 22:57:03,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-03-31 22:57:03,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:57:03,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-03-31 22:57:03,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2243, Unknown=5, NotChecked=0, Total=2450 [2023-03-31 22:57:03,763 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 24 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 22 states have internal predecessors, (58), 4 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-03-31 22:57:04,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:57:04,069 INFO L93 Difference]: Finished difference Result 114 states and 147 transitions. [2023-03-31 22:57:04,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-03-31 22:57:04,070 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 22 states have internal predecessors, (58), 4 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 38 [2023-03-31 22:57:04,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:57:04,071 INFO L225 Difference]: With dead ends: 114 [2023-03-31 22:57:04,071 INFO L226 Difference]: Without dead ends: 80 [2023-03-31 22:57:04,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 72 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=254, Invalid=2821, Unknown=5, NotChecked=0, Total=3080 [2023-03-31 22:57:04,073 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 30 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-03-31 22:57:04,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 346 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-03-31 22:57:04,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-03-31 22:57:04,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 52. [2023-03-31 22:57:04,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 38 states have internal predecessors, (43), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2023-03-31 22:57:04,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 61 transitions. [2023-03-31 22:57:04,083 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 61 transitions. Word has length 38 [2023-03-31 22:57:04,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:57:04,083 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 61 transitions. [2023-03-31 22:57:04,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 22 states have internal predecessors, (58), 4 states have call successors, (9), 2 states have call predecessors, (9), 7 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-03-31 22:57:04,083 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 61 transitions. [2023-03-31 22:57:04,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-03-31 22:57:04,084 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:57:04,084 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 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, 1, 1] [2023-03-31 22:57:04,094 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-03-31 22:57:04,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:57:04,292 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:57:04,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:57:04,292 INFO L85 PathProgramCache]: Analyzing trace with hash -270531219, now seen corresponding path program 2 times [2023-03-31 22:57:04,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:57:04,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265224432] [2023-03-31 22:57:04,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:57:04,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:57:04,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:57:04,532 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-31 22:57:04,532 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:57:04,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265224432] [2023-03-31 22:57:04,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265224432] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:57:04,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848273167] [2023-03-31 22:57:04,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-03-31 22:57:04,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:57:04,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:57:04,534 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:57:04,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-03-31 22:57:04,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-03-31 22:57:04,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 22:57:04,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 41 conjunts are in the unsatisfiable core [2023-03-31 22:57:04,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:57:04,705 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-03-31 22:57:04,878 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 [2023-03-31 22:57:05,052 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:57:05,053 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:57:05,139 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 25 treesize of output 17 [2023-03-31 22:57:05,314 INFO L321 Elim1Store]: treesize reduction 11, result has 64.5 percent of original size [2023-03-31 22:57:05,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 105 treesize of output 104 [2023-03-31 22:57:05,368 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-31 22:57:05,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848273167] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:57:05,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [424834104] [2023-03-31 22:57:05,371 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2023-03-31 22:57:05,371 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:57:05,371 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:57:05,372 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:57:05,372 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:57:05,385 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 23 for LOIs [2023-03-31 22:57:05,533 INFO L197 IcfgInterpreter]: Interpreting procedure sll_length with input of size 22 for LOIs [2023-03-31 22:57:05,546 INFO L197 IcfgInterpreter]: Interpreting procedure sll_create with input of size 42 for LOIs [2023-03-31 22:57:05,621 INFO L197 IcfgInterpreter]: Interpreting procedure _get_nondet_int with input of size 19 for LOIs [2023-03-31 22:57:05,651 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 22:57:05,653 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:57:13,025 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1630#(and (<= 0 |main_~#s~0.base|) (= |main_~#s~0.offset| 0) (= main_~k~0 0) (= main_~len~2 2) (= main_~i~0 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 22:57:13,026 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:57:13,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 22:57:13,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15, 12] total 28 [2023-03-31 22:57:13,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353573227] [2023-03-31 22:57:13,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 22:57:13,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-03-31 22:57:13,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:57:13,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-03-31 22:57:13,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2684, Unknown=3, NotChecked=0, Total=2862 [2023-03-31 22:57:13,029 INFO L87 Difference]: Start difference. First operand 52 states and 61 transitions. Second operand has 28 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 24 states have internal predecessors, (51), 5 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2023-03-31 22:57:15,096 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-31 22:57:17,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-31 22:57:19,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-31 22:57:21,728 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-03-31 22:57:21,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:57:21,729 INFO L93 Difference]: Finished difference Result 92 states and 105 transitions. [2023-03-31 22:57:21,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-03-31 22:57:21,730 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 24 states have internal predecessors, (51), 5 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) Word has length 42 [2023-03-31 22:57:21,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:57:21,732 INFO L225 Difference]: With dead ends: 92 [2023-03-31 22:57:21,732 INFO L226 Difference]: Without dead ends: 86 [2023-03-31 22:57:21,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 85 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=287, Invalid=4000, Unknown=3, NotChecked=0, Total=4290 [2023-03-31 22:57:21,734 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 52 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 11 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2023-03-31 22:57:21,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 640 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 551 Invalid, 4 Unknown, 0 Unchecked, 8.4s Time] [2023-03-31 22:57:21,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2023-03-31 22:57:21,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2023-03-31 22:57:21,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 43 states have (on average 1.186046511627907) internal successors, (51), 45 states have internal predecessors, (51), 10 states have call successors, (10), 8 states have call predecessors, (10), 7 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2023-03-31 22:57:21,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2023-03-31 22:57:21,743 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 42 [2023-03-31 22:57:21,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:57:21,744 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2023-03-31 22:57:21,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 24 states have internal predecessors, (51), 5 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2023-03-31 22:57:21,744 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2023-03-31 22:57:21,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-03-31 22:57:21,745 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:57:21,745 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 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, 1] [2023-03-31 22:57:21,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-03-31 22:57:21,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:57:21,949 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:57:21,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:57:21,949 INFO L85 PathProgramCache]: Analyzing trace with hash -114645584, now seen corresponding path program 3 times [2023-03-31 22:57:21,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:57:21,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188360561] [2023-03-31 22:57:21,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:57:21,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:57:21,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:57:22,229 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-03-31 22:57:22,230 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:57:22,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188360561] [2023-03-31 22:57:22,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188360561] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:57:22,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837816483] [2023-03-31 22:57:22,230 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-03-31 22:57:22,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:57:22,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:57:22,232 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:57:22,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-03-31 22:57:22,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-03-31 22:57:22,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-03-31 22:57:22,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 45 conjunts are in the unsatisfiable core [2023-03-31 22:57:22,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:57:22,459 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-03-31 22:57:22,460 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:57:22,686 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-03-31 22:57:22,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837816483] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:57:22,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1789278451] [2023-03-31 22:57:22,689 INFO L159 IcfgInterpreter]: Started Sifa with 31 locations of interest [2023-03-31 22:57:22,689 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:57:22,689 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:57:22,689 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:57:22,689 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:57:22,709 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 23 for LOIs [2023-03-31 22:57:22,960 INFO L197 IcfgInterpreter]: Interpreting procedure sll_length with input of size 22 for LOIs [2023-03-31 22:57:22,977 INFO L197 IcfgInterpreter]: Interpreting procedure sll_create with input of size 42 for LOIs [2023-03-31 22:57:23,057 INFO L197 IcfgInterpreter]: Interpreting procedure _get_nondet_int with input of size 19 for LOIs [2023-03-31 22:57:23,100 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 22:57:23,104 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:57:24,288 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2181#(and (<= 0 |main_~#s~0.base|) (= |main_~#s~0.offset| 0) (= main_~k~0 0) (= main_~len~2 2) (= main_~i~0 0) (= |#NULL.offset| 0) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2023-03-31 22:57:24,288 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:57:24,288 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 22:57:24,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 15] total 22 [2023-03-31 22:57:24,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541783210] [2023-03-31 22:57:24,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 22:57:24,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-03-31 22:57:24,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:57:24,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-03-31 22:57:24,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2081, Unknown=0, NotChecked=0, Total=2256 [2023-03-31 22:57:24,291 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 22 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 19 states have internal predecessors, (41), 4 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) [2023-03-31 22:57:24,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:57:24,716 INFO L93 Difference]: Finished difference Result 120 states and 165 transitions. [2023-03-31 22:57:24,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-03-31 22:57:24,716 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 19 states have internal predecessors, (41), 4 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) Word has length 43 [2023-03-31 22:57:24,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:57:24,718 INFO L225 Difference]: With dead ends: 120 [2023-03-31 22:57:24,719 INFO L226 Difference]: Without dead ends: 116 [2023-03-31 22:57:24,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 92 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=218, Invalid=2644, Unknown=0, NotChecked=0, Total=2862 [2023-03-31 22:57:24,720 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 33 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:57:24,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 646 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 22:57:24,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-03-31 22:57:24,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 89. [2023-03-31 22:57:24,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 60 states have (on average 1.2666666666666666) internal successors, (76), 68 states have internal predecessors, (76), 17 states have call successors, (17), 8 states have call predecessors, (17), 11 states have return successors, (25), 12 states have call predecessors, (25), 16 states have call successors, (25) [2023-03-31 22:57:24,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 118 transitions. [2023-03-31 22:57:24,746 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 118 transitions. Word has length 43 [2023-03-31 22:57:24,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:57:24,747 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 118 transitions. [2023-03-31 22:57:24,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 19 states have internal predecessors, (41), 4 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (8), 7 states have call predecessors, (8), 4 states have call successors, (8) [2023-03-31 22:57:24,749 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 118 transitions. [2023-03-31 22:57:24,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-03-31 22:57:24,757 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:57:24,757 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 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, 1] [2023-03-31 22:57:24,769 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-03-31 22:57:24,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:57:24,964 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:57:24,964 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:57:24,965 INFO L85 PathProgramCache]: Analyzing trace with hash 422841805, now seen corresponding path program 4 times [2023-03-31 22:57:24,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:57:24,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270169035] [2023-03-31 22:57:24,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:57:24,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:57:24,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:57:25,610 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-03-31 22:57:25,610 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:57:25,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270169035] [2023-03-31 22:57:25,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270169035] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:57:25,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620229459] [2023-03-31 22:57:25,611 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-03-31 22:57:25,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:57:25,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:57:25,612 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-03-31 22:57:25,615 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-03-31 22:57:25,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:57:25,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 70 conjunts are in the unsatisfiable core [2023-03-31 22:57:25,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:57:25,780 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 22:57:25,811 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 22:57:25,815 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 22:57:25,856 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-03-31 22:57:25,856 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-03-31 22:57:25,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 19 treesize of output 18 [2023-03-31 22:57:25,912 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 22 [2023-03-31 22:57:26,619 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:57:26,619 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:57:27,659 INFO L321 Elim1Store]: treesize reduction 11, result has 81.0 percent of original size [2023-03-31 22:57:27,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 2132 treesize of output 2106 [2023-03-31 22:57:30,634 INFO L321 Elim1Store]: treesize reduction 1303, result has 39.2 percent of original size [2023-03-31 22:57:30,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 21 select indices, 21 select index equivalence classes, 0 disjoint index pairs (out of 210 index pairs), introduced 24 new quantified variables, introduced 210 case distinctions, treesize of input 10566 treesize of output 10117