/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain IntervalDomain -i ../sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-03-31 22:55:37,698 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-03-31 22:55:37,700 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-03-31 22:55:37,733 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-03-31 22:55:37,733 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-03-31 22:55:37,735 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-03-31 22:55:37,739 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-03-31 22:55:37,741 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-03-31 22:55:37,742 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-03-31 22:55:37,747 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-03-31 22:55:37,748 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-03-31 22:55:37,750 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-03-31 22:55:37,750 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-03-31 22:55:37,752 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-03-31 22:55:37,753 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-03-31 22:55:37,755 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-03-31 22:55:37,755 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-03-31 22:55:37,756 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-03-31 22:55:37,758 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-03-31 22:55:37,762 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-03-31 22:55:37,764 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-03-31 22:55:37,765 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-03-31 22:55:37,765 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-03-31 22:55:37,766 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-03-31 22:55:37,774 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-03-31 22:55:37,774 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-03-31 22:55:37,774 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-03-31 22:55:37,776 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-03-31 22:55:37,776 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-03-31 22:55:37,777 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-03-31 22:55:37,777 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-03-31 22:55:37,778 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-03-31 22:55:37,779 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-03-31 22:55:37,780 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-03-31 22:55:37,781 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-03-31 22:55:37,781 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-03-31 22:55:37,781 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-03-31 22:55:37,781 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-03-31 22:55:37,781 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-03-31 22:55:37,782 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-03-31 22:55:37,783 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-03-31 22:55:37,784 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 22:55:37,819 INFO L113 SettingsManager]: Loading preferences was successful [2023-03-31 22:55:37,819 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-03-31 22:55:37,819 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-03-31 22:55:37,819 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-03-31 22:55:37,820 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-03-31 22:55:37,820 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-03-31 22:55:37,820 INFO L138 SettingsManager]: * User list type=DISABLED [2023-03-31 22:55:37,821 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-03-31 22:55:37,821 INFO L138 SettingsManager]: * Explicit value domain=true [2023-03-31 22:55:37,821 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-03-31 22:55:37,821 INFO L138 SettingsManager]: * Octagon Domain=false [2023-03-31 22:55:37,822 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-03-31 22:55:37,822 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-03-31 22:55:37,822 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-03-31 22:55:37,822 INFO L138 SettingsManager]: * Interval Domain=false [2023-03-31 22:55:37,822 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-03-31 22:55:37,822 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-03-31 22:55:37,822 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-03-31 22:55:37,823 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-03-31 22:55:37,823 INFO L138 SettingsManager]: * sizeof long=4 [2023-03-31 22:55:37,823 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-03-31 22:55:37,823 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-03-31 22:55:37,823 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-03-31 22:55:37,824 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-03-31 22:55:37,824 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-03-31 22:55:37,824 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-03-31 22:55:37,824 INFO L138 SettingsManager]: * sizeof long double=12 [2023-03-31 22:55:37,824 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-03-31 22:55:37,824 INFO L138 SettingsManager]: * Use constant arrays=true [2023-03-31 22:55:37,824 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-03-31 22:55:37,825 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-03-31 22:55:37,825 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-03-31 22:55:37,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:55:37,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-03-31 22:55:37,825 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-03-31 22:55:37,825 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-03-31 22:55:37,825 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-03-31 22:55:37,825 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-03-31 22:55:37,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-03-31 22:55:37,826 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-03-31 22:55:37,826 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-03-31 22:55:37,826 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> IntervalDomain [2023-03-31 22:55:38,078 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-03-31 22:55:38,105 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-03-31 22:55:38,107 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-03-31 22:55:38,108 INFO L271 PluginConnector]: Initializing CDTParser... [2023-03-31 22:55:38,109 INFO L275 PluginConnector]: CDTParser initialized [2023-03-31 22:55:38,110 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i [2023-03-31 22:55:39,211 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-03-31 22:55:39,494 INFO L351 CDTParser]: Found 1 translation units. [2023-03-31 22:55:39,494 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i [2023-03-31 22:55:39,507 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03d57b2e0/fdb9ada281f44e4481238c6b5d605866/FLAG60fa12751 [2023-03-31 22:55:39,518 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03d57b2e0/fdb9ada281f44e4481238c6b5d605866 [2023-03-31 22:55:39,520 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-03-31 22:55:39,522 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-03-31 22:55:39,523 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-03-31 22:55:39,523 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-03-31 22:55:39,527 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-03-31 22:55:39,527 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:55:39" (1/1) ... [2023-03-31 22:55:39,529 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30143db2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:55:39, skipping insertion in model container [2023-03-31 22:55:39,529 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.03 10:55:39" (1/1) ... [2023-03-31 22:55:39,535 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-03-31 22:55:39,573 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-03-31 22:55:39,828 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i[24165,24178] [2023-03-31 22:55:39,831 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:55:39,846 INFO L203 MainTranslator]: Completed pre-run [2023-03-31 22:55:39,900 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_prepend_unequal.i[24165,24178] [2023-03-31 22:55:39,901 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-03-31 22:55:39,927 INFO L208 MainTranslator]: Completed translation [2023-03-31 22:55:39,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:55:39 WrapperNode [2023-03-31 22:55:39,928 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-03-31 22:55:39,929 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-03-31 22:55:39,929 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-03-31 22:55:39,929 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-03-31 22:55:39,938 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:55:39" (1/1) ... [2023-03-31 22:55:39,939 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:55:39" (1/1) ... [2023-03-31 22:55:39,959 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:55:39" (1/1) ... [2023-03-31 22:55:39,959 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:55:39" (1/1) ... [2023-03-31 22:55:39,973 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:55:39" (1/1) ... [2023-03-31 22:55:39,976 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:55:39" (1/1) ... [2023-03-31 22:55:39,979 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:55:39" (1/1) ... [2023-03-31 22:55:39,982 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:55:39" (1/1) ... [2023-03-31 22:55:39,987 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-03-31 22:55:39,988 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-03-31 22:55:39,988 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-03-31 22:55:39,988 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-03-31 22:55:39,989 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:55:39" (1/1) ... [2023-03-31 22:55:39,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-03-31 22:55:40,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:55:40,041 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 22:55:40,054 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 22:55:40,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-03-31 22:55:40,074 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-03-31 22:55:40,074 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-03-31 22:55:40,074 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2023-03-31 22:55:40,074 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2023-03-31 22:55:40,075 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-03-31 22:55:40,075 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-03-31 22:55:40,075 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2023-03-31 22:55:40,075 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2023-03-31 22:55:40,075 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_prepend [2023-03-31 22:55:40,075 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-03-31 22:55:40,075 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-03-31 22:55:40,076 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-03-31 22:55:40,076 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-03-31 22:55:40,076 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-03-31 22:55:40,076 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-03-31 22:55:40,076 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-03-31 22:55:40,076 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2023-03-31 22:55:40,076 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2023-03-31 22:55:40,077 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-03-31 22:55:40,077 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-03-31 22:55:40,077 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-03-31 22:55:40,077 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-03-31 22:55:40,077 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-03-31 22:55:40,077 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-03-31 22:55:40,077 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-03-31 22:55:40,077 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-03-31 22:55:40,078 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-03-31 22:55:40,078 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-03-31 22:55:40,078 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-03-31 22:55:40,078 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-03-31 22:55:40,078 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-03-31 22:55:40,078 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-03-31 22:55:40,078 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-03-31 22:55:40,078 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-03-31 22:55:40,079 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-03-31 22:55:40,079 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-03-31 22:55:40,079 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-03-31 22:55:40,079 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-03-31 22:55:40,079 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-03-31 22:55:40,079 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-03-31 22:55:40,079 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-03-31 22:55:40,080 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-03-31 22:55:40,080 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-03-31 22:55:40,080 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-03-31 22:55:40,080 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-03-31 22:55:40,080 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-03-31 22:55:40,080 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-03-31 22:55:40,080 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-03-31 22:55:40,081 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-03-31 22:55:40,081 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-03-31 22:55:40,081 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-03-31 22:55:40,081 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-03-31 22:55:40,081 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-03-31 22:55:40,081 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-03-31 22:55:40,081 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-03-31 22:55:40,081 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-03-31 22:55:40,082 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-03-31 22:55:40,082 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-03-31 22:55:40,082 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-03-31 22:55:40,082 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-03-31 22:55:40,082 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-03-31 22:55:40,082 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-03-31 22:55:40,082 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-03-31 22:55:40,082 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-03-31 22:55:40,083 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-03-31 22:55:40,083 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-03-31 22:55:40,083 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-03-31 22:55:40,083 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-03-31 22:55:40,083 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-03-31 22:55:40,083 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-03-31 22:55:40,083 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-03-31 22:55:40,083 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-03-31 22:55:40,083 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-03-31 22:55:40,084 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-03-31 22:55:40,084 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-03-31 22:55:40,084 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-03-31 22:55:40,084 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2023-03-31 22:55:40,084 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-03-31 22:55:40,084 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2023-03-31 22:55:40,084 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-03-31 22:55:40,084 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-03-31 22:55:40,085 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2023-03-31 22:55:40,085 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-03-31 22:55:40,085 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-03-31 22:55:40,085 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-03-31 22:55:40,085 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-03-31 22:55:40,085 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-03-31 22:55:40,085 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-03-31 22:55:40,085 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-03-31 22:55:40,085 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-03-31 22:55:40,085 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-03-31 22:55:40,086 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-03-31 22:55:40,086 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-03-31 22:55:40,086 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-03-31 22:55:40,086 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-03-31 22:55:40,086 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-03-31 22:55:40,086 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-03-31 22:55:40,086 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-03-31 22:55:40,086 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-03-31 22:55:40,086 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-03-31 22:55:40,087 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-03-31 22:55:40,087 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-03-31 22:55:40,087 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-03-31 22:55:40,087 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-03-31 22:55:40,087 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-03-31 22:55:40,087 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-03-31 22:55:40,087 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-03-31 22:55:40,087 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-03-31 22:55:40,087 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-03-31 22:55:40,088 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-03-31 22:55:40,088 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-03-31 22:55:40,088 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-03-31 22:55:40,088 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-03-31 22:55:40,088 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-03-31 22:55:40,088 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-03-31 22:55:40,088 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-03-31 22:55:40,088 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-03-31 22:55:40,088 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-03-31 22:55:40,089 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-03-31 22:55:40,089 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-03-31 22:55:40,089 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-03-31 22:55:40,089 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-03-31 22:55:40,089 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-03-31 22:55:40,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-03-31 22:55:40,089 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-03-31 22:55:40,089 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2023-03-31 22:55:40,090 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2023-03-31 22:55:40,090 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-03-31 22:55:40,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-03-31 22:55:40,090 INFO L130 BoogieDeclarations]: Found specification of procedure sll_prepend [2023-03-31 22:55:40,090 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-03-31 22:55:40,090 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-03-31 22:55:40,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-03-31 22:55:40,090 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-03-31 22:55:40,090 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-03-31 22:55:40,090 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-03-31 22:55:40,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-03-31 22:55:40,357 INFO L236 CfgBuilder]: Building ICFG [2023-03-31 22:55:40,359 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-03-31 22:55:40,386 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-03-31 22:55:40,577 INFO L277 CfgBuilder]: Performing block encoding [2023-03-31 22:55:40,625 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-03-31 22:55:40,625 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-03-31 22:55:40,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:55:40 BoogieIcfgContainer [2023-03-31 22:55:40,628 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-03-31 22:55:40,629 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-03-31 22:55:40,630 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-03-31 22:55:40,635 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-03-31 22:55:40,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.03 10:55:39" (1/3) ... [2023-03-31 22:55:40,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@206d4f06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:55:40, skipping insertion in model container [2023-03-31 22:55:40,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.03 10:55:39" (2/3) ... [2023-03-31 22:55:40,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@206d4f06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.03 10:55:40, skipping insertion in model container [2023-03-31 22:55:40,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.03 10:55:40" (3/3) ... [2023-03-31 22:55:40,642 INFO L112 eAbstractionObserver]: Analyzing ICFG sll2n_prepend_unequal.i [2023-03-31 22:55:40,660 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-03-31 22:55:40,660 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-03-31 22:55:40,715 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-03-31 22:55:40,722 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;@64cd663c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-03-31 22:55:40,722 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-03-31 22:55:40,726 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 25 states have internal predecessors, (32), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2023-03-31 22:55:40,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-03-31 22:55:40,734 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:55:40,735 INFO L195 NwaCegarLoop]: trace histogram [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 22:55:40,735 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:55:40,743 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:55:40,744 INFO L85 PathProgramCache]: Analyzing trace with hash -308473228, now seen corresponding path program 1 times [2023-03-31 22:55:40,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:55:40,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068663249] [2023-03-31 22:55:40,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:55:40,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:55:40,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:55:41,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:55:41,189 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:55:41,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068663249] [2023-03-31 22:55:41,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068663249] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:55:41,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:55:41,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-03-31 22:55:41,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234848624] [2023-03-31 22:55:41,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:55:41,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-03-31 22:55:41,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:55:41,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-03-31 22:55:41,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-03-31 22:55:41,228 INFO L87 Difference]: Start difference. First operand has 40 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 25 states have internal predecessors, (32), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 5 states, 3 states have (on average 4.333333333333333) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-03-31 22:55:41,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:55:41,340 INFO L93 Difference]: Finished difference Result 73 states and 87 transitions. [2023-03-31 22:55:41,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-03-31 22:55:41,343 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 4.333333333333333) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 22 [2023-03-31 22:55:41,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:55:41,348 INFO L225 Difference]: With dead ends: 73 [2023-03-31 22:55:41,349 INFO L226 Difference]: Without dead ends: 31 [2023-03-31 22:55:41,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-03-31 22:55:41,356 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 15 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:55:41,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 124 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 22:55:41,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-03-31 22:55:41,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-03-31 22:55:41,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-03-31 22:55:41,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-03-31 22:55:41,394 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 22 [2023-03-31 22:55:41,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:55:41,394 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-03-31 22:55:41,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 4.333333333333333) internal successors, (13), 5 states have internal predecessors, (13), 3 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2023-03-31 22:55:41,395 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-03-31 22:55:41,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-03-31 22:55:41,396 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:55:41,396 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:55:41,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-03-31 22:55:41,397 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:55:41,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:55:41,398 INFO L85 PathProgramCache]: Analyzing trace with hash -740569555, now seen corresponding path program 1 times [2023-03-31 22:55:41,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:55:41,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609110592] [2023-03-31 22:55:41,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:55:41,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:55:41,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:55:41,667 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 22:55:41,667 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:55:41,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609110592] [2023-03-31 22:55:41,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609110592] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:55:41,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404008958] [2023-03-31 22:55:41,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:55:41,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:55:41,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:55:41,675 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 22:55:41,682 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 22:55:41,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:55:41,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 5 conjunts are in the unsatisfiable core [2023-03-31 22:55:41,881 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:55:41,962 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-03-31 22:55:41,963 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-03-31 22:55:42,109 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-03-31 22:55:42,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404008958] provided 0 perfect and 2 imperfect interpolant sequences [2023-03-31 22:55:42,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [284840865] [2023-03-31 22:55:42,130 INFO L159 IcfgInterpreter]: Started Sifa with 25 locations of interest [2023-03-31 22:55:42,130 INFO L166 IcfgInterpreter]: Building call graph [2023-03-31 22:55:42,133 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-03-31 22:55:42,137 INFO L176 IcfgInterpreter]: Starting interpretation [2023-03-31 22:55:42,138 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-03-31 22:55:42,306 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 23 for LOIs [2023-03-31 22:55:42,692 INFO L197 IcfgInterpreter]: Interpreting procedure sll_prepend with input of size 33 for LOIs [2023-03-31 22:55:42,813 INFO L197 IcfgInterpreter]: Interpreting procedure sll_create with input of size 44 for LOIs [2023-03-31 22:55:43,055 INFO L197 IcfgInterpreter]: Interpreting procedure node_create with input of size 15 for LOIs [2023-03-31 22:55:43,077 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-03-31 22:55:43,100 INFO L180 IcfgInterpreter]: Interpretation finished [2023-03-31 22:55:48,821 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '384#(and (<= 0 |main_~#s~0.base|) (= main_~data~0 1) (= |main_~#s~0.offset| 0) (= main_~ptr~0.base (select (select |#memory_$Pointer$.base| |main_~#s~0.base|) 0)) (= main_~len~0 2) (= |#NULL.offset| 0) (= 5 main_~uneq~0) (= (select (select |#memory_$Pointer$.offset| |main_~#s~0.base|) 0) main_~ptr~0.offset) (<= 0 |#StackHeapBarrier|) (not (= (select (select |#memory_int| main_~ptr~0.base) main_~ptr~0.offset) 5)) (= |#NULL.base| 0))' at error location [2023-03-31 22:55:48,821 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-03-31 22:55:48,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-03-31 22:55:48,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-03-31 22:55:48,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115333500] [2023-03-31 22:55:48,823 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-03-31 22:55:48,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-03-31 22:55:48,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:55:48,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-03-31 22:55:48,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2023-03-31 22:55:48,826 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 12 states, 8 states have (on average 3.625) internal successors, (29), 12 states have internal predecessors, (29), 7 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2023-03-31 22:55:48,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:55:48,980 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2023-03-31 22:55:48,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-03-31 22:55:48,980 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 3.625) internal successors, (29), 12 states have internal predecessors, (29), 7 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) Word has length 29 [2023-03-31 22:55:48,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:55:48,981 INFO L225 Difference]: With dead ends: 52 [2023-03-31 22:55:48,981 INFO L226 Difference]: Without dead ends: 34 [2023-03-31 22:55:48,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2023-03-31 22:55:48,983 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 23 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-03-31 22:55:48,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 57 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-03-31 22:55:48,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-03-31 22:55:48,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2023-03-31 22:55:48,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 22:55:48,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2023-03-31 22:55:48,990 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 29 [2023-03-31 22:55:48,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:55:48,990 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2023-03-31 22:55:48,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 3.625) internal successors, (29), 12 states have internal predecessors, (29), 7 states have call successors, (11), 2 states have call predecessors, (11), 4 states have return successors, (10), 5 states have call predecessors, (10), 7 states have call successors, (10) [2023-03-31 22:55:48,990 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2023-03-31 22:55:48,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-03-31 22:55:48,991 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:55:48,991 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-03-31 22:55:49,003 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 22:55:49,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:55:49,200 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:55:49,201 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:55:49,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1721884588, now seen corresponding path program 2 times [2023-03-31 22:55:49,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:55:49,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611552790] [2023-03-31 22:55:49,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:55:49,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:55:49,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:55:50,243 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-03-31 22:55:50,244 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:55:50,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611552790] [2023-03-31 22:55:50,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611552790] provided 1 perfect and 0 imperfect interpolant sequences [2023-03-31 22:55:50,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-03-31 22:55:50,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-03-31 22:55:50,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336109479] [2023-03-31 22:55:50,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-03-31 22:55:50,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-03-31 22:55:50,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-03-31 22:55:50,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-03-31 22:55:50,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2023-03-31 22:55:50,246 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand has 10 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 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 22:55:50,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-03-31 22:55:50,695 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2023-03-31 22:55:50,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-03-31 22:55:50,701 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 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 36 [2023-03-31 22:55:50,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-03-31 22:55:50,702 INFO L225 Difference]: With dead ends: 34 [2023-03-31 22:55:50,702 INFO L226 Difference]: Without dead ends: 32 [2023-03-31 22:55:50,702 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2023-03-31 22:55:50,703 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 18 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-03-31 22:55:50,704 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 102 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-03-31 22:55:50,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-03-31 22:55:50,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-03-31 22:55:50,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-03-31 22:55:50,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2023-03-31 22:55:50,709 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 36 [2023-03-31 22:55:50,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-03-31 22:55:50,709 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2023-03-31 22:55:50,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 8 states have internal predecessors, (18), 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 22:55:50,713 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2023-03-31 22:55:50,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-03-31 22:55:50,715 INFO L187 NwaCegarLoop]: Found error trace [2023-03-31 22:55:50,715 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 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] [2023-03-31 22:55:50,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-03-31 22:55:50,716 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-03-31 22:55:50,717 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-03-31 22:55:50,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1168578336, now seen corresponding path program 1 times [2023-03-31 22:55:50,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-03-31 22:55:50,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774043016] [2023-03-31 22:55:50,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:55:50,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-03-31 22:55:50,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:55:52,063 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-03-31 22:55:52,063 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-03-31 22:55:52,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774043016] [2023-03-31 22:55:52,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774043016] provided 0 perfect and 1 imperfect interpolant sequences [2023-03-31 22:55:52,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881409887] [2023-03-31 22:55:52,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-03-31 22:55:52,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-03-31 22:55:52,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-03-31 22:55:52,067 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 22:55:52,069 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 22:55:52,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-03-31 22:55:52,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 57 conjunts are in the unsatisfiable core [2023-03-31 22:55:52,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-03-31 22:55:52,502 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 8 treesize of output 4 [2023-03-31 22:55:52,648 WARN L861 $PredicateComparison]: unable to prove that (and (< |c_node_create_#res.base| |c_#StackHeapBarrier|) (exists ((v_ArrVal_325 (Array Int Int))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_node_create_#res.base| v_ArrVal_325)))) is different from true [2023-03-31 22:55:52,808 INFO L321 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2023-03-31 22:55:52,808 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 74 [2023-03-31 22:55:52,832 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 8 treesize of output 7 [2023-03-31 22:55:52,852 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 12 treesize of output 11 [2023-03-31 22:55:52,981 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 46 [2023-03-31 22:55:52,991 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 37 [2023-03-31 22:55:53,053 WARN L861 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_$Pointer$.offset| |c_sll_prepend_#in~head.base|) |c_sll_prepend_#in~head.offset|))) (let ((.cse0 (+ .cse1 4))) (or (exists ((sll_prepend_~new_head~1.base Int)) (and (exists ((v_ArrVal_325 (Array Int Int)) (v_ArrVal_330 (Array Int Int))) (= (store (store |c_old(#memory_$Pointer$.base)| sll_prepend_~new_head~1.base (store v_ArrVal_325 .cse0 (select (select (store |c_old(#memory_$Pointer$.base)| sll_prepend_~new_head~1.base v_ArrVal_325) |c_sll_prepend_#in~head.base|) |c_sll_prepend_#in~head.offset|))) |c_sll_prepend_#in~head.base| (store (select (store |c_old(#memory_$Pointer$.base)| sll_prepend_~new_head~1.base v_ArrVal_330) |c_sll_prepend_#in~head.base|) |c_sll_prepend_#in~head.offset| sll_prepend_~new_head~1.base)) |c_#memory_$Pointer$.base|)) (exists ((v_DerPreprocessor_1 (Array Int Int)) (v_DerPreprocessor_2 (Array Int Int))) (and (= .cse1 (select v_DerPreprocessor_2 |c_sll_prepend_#in~head.offset|)) (= (select (store (store (store (store |c_#memory_$Pointer$.offset| sll_prepend_~new_head~1.base v_DerPreprocessor_1) |c_sll_prepend_#in~head.base| v_DerPreprocessor_2) sll_prepend_~new_head~1.base v_DerPreprocessor_1) |c_sll_prepend_#in~head.base| v_DerPreprocessor_2) sll_prepend_~new_head~1.base) v_DerPreprocessor_1))) (< sll_prepend_~new_head~1.base |c_#StackHeapBarrier|))) (exists ((sll_prepend_~new_head~1.base Int)) (and (exists ((v_ArrVal_325 (Array Int Int)) (v_ArrVal_330 (Array Int Int))) (= (store (store |c_old(#memory_$Pointer$.base)| sll_prepend_~new_head~1.base (store v_ArrVal_325 .cse0 (select (select (store |c_old(#memory_$Pointer$.base)| sll_prepend_~new_head~1.base v_ArrVal_325) |c_sll_prepend_#in~head.base|) |c_sll_prepend_#in~head.offset|))) |c_sll_prepend_#in~head.base| (store (select (store |c_old(#memory_$Pointer$.base)| sll_prepend_~new_head~1.base v_ArrVal_330) |c_sll_prepend_#in~head.base|) |c_sll_prepend_#in~head.offset| sll_prepend_~new_head~1.base)) |c_#memory_$Pointer$.base|)) (not (= |c_sll_prepend_#in~head.base| sll_prepend_~new_head~1.base)) (< sll_prepend_~new_head~1.base |c_#StackHeapBarrier|)))))) is different from true [2023-03-31 22:55:54,130 INFO L321 Elim1Store]: treesize reduction 104, result has 60.8 percent of original size [2023-03-31 22:55:54,131 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 8 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 9 new quantified variables, introduced 8 case distinctions, treesize of input 308 treesize of output 998 [2023-03-31 22:55:54,333 INFO L321 Elim1Store]: treesize reduction 50, result has 23.1 percent of original size [2023-03-31 22:55:54,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 99 treesize of output 114 [2023-03-31 22:55:54,551 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-31 22:55:54,757 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-31 22:55:54,849 INFO L173 IndexEqualityManager]: detected equality via solver [2023-03-31 22:55:54,908 INFO L217 Elim1Store]: Index analysis took 468 ms [2023-03-31 22:55:55,400 INFO L321 Elim1Store]: treesize reduction 255, result has 3.0 percent of original size [2023-03-31 22:55:55,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 12 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 33 case distinctions, treesize of input 551 treesize of output 6141 [2023-03-31 22:55:55,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 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 18338 treesize of output 16747 [2023-03-31 22:55:56,170 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 17427 treesize of output 15736 [2023-03-31 22:55:57,566 INFO L321 Elim1Store]: treesize reduction 66, result has 7.0 percent of original size [2023-03-31 22:55:57,567 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 221 treesize of output 220 [2023-03-31 22:55:58,544 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 34 [2023-03-31 22:56:00,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-03-31 22:56:02,379 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 15 [2023-03-31 22:56:03,882 INFO L321 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2023-03-31 22:56:03,883 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 13 treesize of output 3 [2023-03-31 22:56:09,090 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9996 treesize of output 9972 [2023-03-31 22:56:22,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7