/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/list-ext3-properties/dll_nullified-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 11:00:32,857 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 11:00:32,859 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 11:00:32,894 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 11:00:32,894 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 11:00:32,898 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 11:00:32,900 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 11:00:32,902 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 11:00:32,903 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 11:00:32,907 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 11:00:32,908 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 11:00:32,909 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 11:00:32,909 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 11:00:32,911 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 11:00:32,911 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 11:00:32,912 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 11:00:32,913 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 11:00:32,913 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 11:00:32,915 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 11:00:32,918 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 11:00:32,919 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 11:00:32,920 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 11:00:32,920 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 11:00:32,921 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 11:00:32,927 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 11:00:32,927 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 11:00:32,928 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 11:00:32,929 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 11:00:32,929 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 11:00:32,929 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 11:00:32,930 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 11:00:32,930 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 11:00:32,931 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 11:00:32,931 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 11:00:32,932 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 11:00:32,932 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 11:00:32,932 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 11:00:32,932 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 11:00:32,932 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 11:00:32,933 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 11:00:32,933 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 11:00:32,934 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2023-04-01 11:00:32,956 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 11:00:32,956 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 11:00:32,957 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 11:00:32,957 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 11:00:32,958 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 11:00:32,958 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 11:00:32,958 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 11:00:32,958 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 11:00:32,958 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 11:00:32,958 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 11:00:32,958 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 11:00:32,959 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 11:00:32,959 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 11:00:32,959 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 11:00:32,959 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 11:00:32,959 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 11:00:32,959 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 11:00:32,959 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 11:00:32,959 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 11:00:32,960 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 11:00:32,960 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 11:00:32,960 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 11:00:32,960 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 11:00:32,960 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 11:00:32,960 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 11:00:32,960 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 11:00:32,960 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 11:00:32,960 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 11:00:32,960 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 11:00:32,961 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 11:00:32,961 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 11:00:32,961 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 11:00:32,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:00:32,961 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 11:00:32,961 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 11:00:32,961 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 11:00:32,961 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 11:00:32,961 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 11:00:32,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 11:00:32,962 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 11:00:32,962 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 11:00:32,962 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 11:00:33,133 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 11:00:33,148 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 11:00:33,149 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 11:00:33,151 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 11:00:33,151 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 11:00:33,152 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-ext3-properties/dll_nullified-2.i [2023-04-01 11:00:34,145 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 11:00:34,396 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 11:00:34,396 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-ext3-properties/dll_nullified-2.i [2023-04-01 11:00:34,405 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d7fdd13e/aa122e9981034d85b8fbb03b95b3c9c6/FLAGfa2dcd689 [2023-04-01 11:00:34,416 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2d7fdd13e/aa122e9981034d85b8fbb03b95b3c9c6 [2023-04-01 11:00:34,417 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 11:00:34,419 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 11:00:34,421 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 11:00:34,421 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 11:00:34,423 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 11:00:34,423 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:00:34" (1/1) ... [2023-04-01 11:00:34,424 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@796b2f56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:00:34, skipping insertion in model container [2023-04-01 11:00:34,424 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 11:00:34" (1/1) ... [2023-04-01 11:00:34,429 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 11:00:34,468 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 11:00:34,715 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/dll_nullified-2.i[23974,23987] [2023-04-01 11:00:34,718 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:00:34,729 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 11:00:34,764 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/dll_nullified-2.i[23974,23987] [2023-04-01 11:00:34,764 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 11:00:34,793 INFO L208 MainTranslator]: Completed translation [2023-04-01 11:00:34,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:00:34 WrapperNode [2023-04-01 11:00:34,793 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 11:00:34,794 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 11:00:34,794 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 11:00:34,794 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 11:00:34,802 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:00:34" (1/1) ... [2023-04-01 11:00:34,802 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:00:34" (1/1) ... [2023-04-01 11:00:34,825 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:00:34" (1/1) ... [2023-04-01 11:00:34,826 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:00:34" (1/1) ... [2023-04-01 11:00:34,834 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:00:34" (1/1) ... [2023-04-01 11:00:34,845 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:00:34" (1/1) ... [2023-04-01 11:00:34,850 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:00:34" (1/1) ... [2023-04-01 11:00:34,851 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:00:34" (1/1) ... [2023-04-01 11:00:34,855 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 11:00:34,855 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 11:00:34,856 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 11:00:34,856 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 11:00:34,856 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:00:34" (1/1) ... [2023-04-01 11:00:34,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 11:00:34,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:00:34,885 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-04-01 11:00:34,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-04-01 11:00:34,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 11:00:34,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 11:00:34,938 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 11:00:34,938 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2023-04-01 11:00:34,942 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2023-04-01 11:00:34,942 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-04-01 11:00:34,942 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2023-04-01 11:00:34,942 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 11:00:34,943 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 11:00:34,943 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 11:00:34,943 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 11:00:34,943 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 11:00:34,943 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 11:00:34,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 11:00:34,943 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2023-04-01 11:00:34,943 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2023-04-01 11:00:34,944 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-04-01 11:00:34,944 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-04-01 11:00:34,944 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-04-01 11:00:34,944 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-04-01 11:00:34,944 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-04-01 11:00:34,959 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-04-01 11:00:34,959 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-04-01 11:00:34,959 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-04-01 11:00:34,959 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-04-01 11:00:34,959 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-04-01 11:00:34,959 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-04-01 11:00:34,959 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-04-01 11:00:34,959 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-04-01 11:00:34,959 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-04-01 11:00:34,959 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-04-01 11:00:34,960 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-04-01 11:00:34,960 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-04-01 11:00:34,960 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-04-01 11:00:34,960 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-04-01 11:00:34,960 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-04-01 11:00:34,960 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-04-01 11:00:34,960 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-04-01 11:00:34,960 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-04-01 11:00:34,960 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-04-01 11:00:34,960 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-04-01 11:00:34,960 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-04-01 11:00:34,960 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-04-01 11:00:34,960 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-04-01 11:00:34,961 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-04-01 11:00:34,961 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-04-01 11:00:34,961 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-04-01 11:00:34,961 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-04-01 11:00:34,961 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-04-01 11:00:34,961 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-04-01 11:00:34,961 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-04-01 11:00:34,961 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-04-01 11:00:34,961 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-04-01 11:00:34,961 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-04-01 11:00:34,961 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-04-01 11:00:34,961 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-04-01 11:00:34,961 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-04-01 11:00:34,962 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-04-01 11:00:34,962 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-04-01 11:00:34,962 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-04-01 11:00:34,962 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-04-01 11:00:34,962 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-04-01 11:00:34,962 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-04-01 11:00:34,962 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-04-01 11:00:34,962 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-04-01 11:00:34,962 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-04-01 11:00:34,962 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 11:00:34,962 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-04-01 11:00:34,962 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-04-01 11:00:34,962 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 11:00:34,963 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-04-01 11:00:34,963 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-04-01 11:00:34,963 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-04-01 11:00:34,963 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-04-01 11:00:34,963 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2023-04-01 11:00:34,963 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-04-01 11:00:34,963 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2023-04-01 11:00:34,963 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-04-01 11:00:34,963 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 11:00:34,963 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2023-04-01 11:00:34,963 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-04-01 11:00:34,963 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-04-01 11:00:34,963 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-04-01 11:00:34,964 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-04-01 11:00:34,964 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-04-01 11:00:34,964 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-04-01 11:00:34,964 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-04-01 11:00:34,964 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-04-01 11:00:34,964 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-04-01 11:00:34,964 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-04-01 11:00:34,964 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-04-01 11:00:34,964 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-04-01 11:00:34,964 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-04-01 11:00:34,964 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-04-01 11:00:34,964 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-04-01 11:00:34,964 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-04-01 11:00:34,965 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-04-01 11:00:34,965 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-04-01 11:00:34,965 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-04-01 11:00:34,965 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-04-01 11:00:34,965 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-04-01 11:00:34,965 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-04-01 11:00:34,965 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-04-01 11:00:34,965 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-04-01 11:00:34,965 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-04-01 11:00:34,965 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-04-01 11:00:34,965 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-04-01 11:00:34,965 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-04-01 11:00:34,965 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-04-01 11:00:34,966 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-04-01 11:00:34,966 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-04-01 11:00:34,966 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-04-01 11:00:34,966 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-04-01 11:00:34,966 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-04-01 11:00:34,966 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-04-01 11:00:34,966 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-04-01 11:00:34,966 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-04-01 11:00:34,966 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-04-01 11:00:34,966 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-04-01 11:00:34,966 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2023-04-01 11:00:34,966 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 11:00:34,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 11:00:34,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 11:00:34,967 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 11:00:34,967 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 11:00:34,967 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 11:00:34,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 11:00:34,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 11:00:34,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 11:00:34,967 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 11:00:35,279 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 11:00:35,283 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 11:00:35,312 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-04-01 11:00:35,424 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 11:00:35,478 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 11:00:35,478 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 11:00:35,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:00:35 BoogieIcfgContainer [2023-04-01 11:00:35,480 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 11:00:35,482 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 11:00:35,482 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 11:00:35,484 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 11:00:35,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 11:00:34" (1/3) ... [2023-04-01 11:00:35,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f32e732 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:00:35, skipping insertion in model container [2023-04-01 11:00:35,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 11:00:34" (2/3) ... [2023-04-01 11:00:35,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f32e732 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 11:00:35, skipping insertion in model container [2023-04-01 11:00:35,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 11:00:35" (3/3) ... [2023-04-01 11:00:35,486 INFO L112 eAbstractionObserver]: Analyzing ICFG dll_nullified-2.i [2023-04-01 11:00:35,497 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 11:00:35,497 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 11:00:35,526 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 11:00:35,530 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;@32967cb8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 11:00:35,530 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 11:00:35,533 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 11:00:35,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 11:00:35,538 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:00:35,539 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:00:35,540 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:00:35,545 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:00:35,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1648136089, now seen corresponding path program 1 times [2023-04-01 11:00:35,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:00:35,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524831674] [2023-04-01 11:00:35,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:00:35,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:00:35,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:00:35,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:00:35,658 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:00:35,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524831674] [2023-04-01 11:00:35,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524831674] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:00:35,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:00:35,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-04-01 11:00:35,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729255018] [2023-04-01 11:00:35,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:00:35,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-04-01 11:00:35,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:00:35,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-04-01 11:00:35,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 11:00:35,682 INFO L87 Difference]: Start difference. First operand has 26 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 18 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 11:00:35,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:00:35,718 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2023-04-01 11:00:35,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-04-01 11:00:35,720 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2023-04-01 11:00:35,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:00:35,724 INFO L225 Difference]: With dead ends: 34 [2023-04-01 11:00:35,725 INFO L226 Difference]: Without dead ends: 19 [2023-04-01 11:00:35,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-04-01 11:00:35,728 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-04-01 11:00:35,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-04-01 11:00:35,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-04-01 11:00:35,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-04-01 11:00:35,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 11:00:35,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2023-04-01 11:00:35,750 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 14 [2023-04-01 11:00:35,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:00:35,750 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2023-04-01 11:00:35,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-04-01 11:00:35,751 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2023-04-01 11:00:35,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-04-01 11:00:35,751 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:00:35,751 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:00:35,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 11:00:35,752 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:00:35,752 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:00:35,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1648883685, now seen corresponding path program 1 times [2023-04-01 11:00:35,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:00:35,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279523930] [2023-04-01 11:00:35,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:00:35,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:00:35,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:00:35,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:00:35,857 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:00:35,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279523930] [2023-04-01 11:00:35,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279523930] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 11:00:35,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 11:00:35,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 11:00:35,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578310016] [2023-04-01 11:00:35,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 11:00:35,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 11:00:35,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:00:35,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 11:00:35,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 11:00:35,860 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 5 states, 3 states have (on average 3.0) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 11:00:35,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:00:35,975 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2023-04-01 11:00:35,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 11:00:35,976 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 3.0) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2023-04-01 11:00:35,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:00:35,976 INFO L225 Difference]: With dead ends: 31 [2023-04-01 11:00:35,976 INFO L226 Difference]: Without dead ends: 22 [2023-04-01 11:00:35,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-04-01 11:00:35,978 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 13 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 11:00:35,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 49 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 11:00:35,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-04-01 11:00:35,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2023-04-01 11:00:35,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 11:00:35,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2023-04-01 11:00:35,999 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2023-04-01 11:00:35,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:00:35,999 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2023-04-01 11:00:36,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 3.0) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 11:00:36,000 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2023-04-01 11:00:36,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-04-01 11:00:36,002 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:00:36,002 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:00:36,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-04-01 11:00:36,002 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:00:36,005 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:00:36,005 INFO L85 PathProgramCache]: Analyzing trace with hash 305343428, now seen corresponding path program 1 times [2023-04-01 11:00:36,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:00:36,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771306585] [2023-04-01 11:00:36,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:00:36,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:00:36,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:00:36,172 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:00:36,173 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:00:36,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771306585] [2023-04-01 11:00:36,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771306585] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:00:36,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052934019] [2023-04-01 11:00:36,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:00:36,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:00:36,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:00:36,183 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:00:36,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-04-01 11:00:36,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:00:36,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 11:00:36,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:00:36,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:00:36,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:00:36,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:00:36,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052934019] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:00:36,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [981714164] [2023-04-01 11:00:36,547 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 11:00:36,547 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:00:36,550 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:00:36,553 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:00:36,553 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:00:36,670 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-01 11:00:37,229 INFO L197 IcfgInterpreter]: Interpreting procedure dll_create with input of size 52 for LOIs [2023-04-01 11:00:37,780 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:00:37,798 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:00:38,884 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '300#(or (and (= (select |old(#valid)| 1) 1) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (not (= main_~head~1.base 0)) (not (= main_~head~1.base |#StackHeapBarrier|)) (not (= |#StackHeapBarrier| 0)) (= 5 main_~len~0) (= (select (select |old(#memory_int)| 1) 0) 48) (not (= (select (select |#memory_$Pointer$.offset| main_~head~1.base) 4) 0)) (= |#NULL.offset| 0) (= (select |old(#length)| 2) 18) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= 0 main_~head~1.offset) (= |#NULL.base| 0)) (and (= (select |old(#valid)| 1) 1) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (not (= main_~head~1.base 0)) (not (= main_~head~1.base |#StackHeapBarrier|)) (not (= |#StackHeapBarrier| 0)) (= 5 main_~len~0) (not (= (select (select |#memory_$Pointer$.base| main_~head~1.base) 4) 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= |#NULL.offset| 0) (= (select |old(#length)| 2) 18) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= 0 main_~head~1.offset) (= |#NULL.base| 0)))' at error location [2023-04-01 11:00:38,884 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:00:38,884 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:00:38,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2023-04-01 11:00:38,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692387842] [2023-04-01 11:00:38,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:00:38,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-04-01 11:00:38,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:00:38,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-04-01 11:00:38,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2023-04-01 11:00:38,887 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 9 states, 6 states have (on average 3.0) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 11:00:39,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:00:39,060 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2023-04-01 11:00:39,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 11:00:39,061 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 6 states have (on average 3.0) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 17 [2023-04-01 11:00:39,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:00:39,062 INFO L225 Difference]: With dead ends: 34 [2023-04-01 11:00:39,062 INFO L226 Difference]: Without dead ends: 25 [2023-04-01 11:00:39,063 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2023-04-01 11:00:39,063 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 16 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 11:00:39,063 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 43 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 11:00:39,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-04-01 11:00:39,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2023-04-01 11:00:39,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 11:00:39,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-04-01 11:00:39,066 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 17 [2023-04-01 11:00:39,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:00:39,066 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-04-01 11:00:39,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 6 states have (on average 3.0) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 11:00:39,066 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-04-01 11:00:39,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-04-01 11:00:39,067 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:00:39,067 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:00:39,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-04-01 11:00:39,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:00:39,279 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:00:39,280 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:00:39,280 INFO L85 PathProgramCache]: Analyzing trace with hash 403569531, now seen corresponding path program 2 times [2023-04-01 11:00:39,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:00:39,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137688768] [2023-04-01 11:00:39,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:00:39,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:00:39,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:00:39,538 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:00:39,538 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:00:39,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137688768] [2023-04-01 11:00:39,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137688768] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:00:39,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905884282] [2023-04-01 11:00:39,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 11:00:39,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:00:39,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:00:39,541 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) [2023-04-01 11:00:39,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-04-01 11:00:39,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-04-01 11:00:39,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:00:39,706 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 6 conjunts are in the unsatisfiable core [2023-04-01 11:00:39,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:00:39,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:00:39,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:00:39,799 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:00:39,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905884282] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:00:39,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1822956602] [2023-04-01 11:00:39,801 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 11:00:39,801 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:00:39,801 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:00:39,801 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:00:39,801 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:00:39,841 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-01 11:00:40,127 INFO L197 IcfgInterpreter]: Interpreting procedure dll_create with input of size 52 for LOIs [2023-04-01 11:00:40,557 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:00:40,559 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:00:41,793 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '529#(or (and (= (select |old(#valid)| 1) 1) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (not (= main_~head~1.base 0)) (not (= main_~head~1.base |#StackHeapBarrier|)) (not (= |#StackHeapBarrier| 0)) (= 5 main_~len~0) (= (select (select |old(#memory_int)| 1) 0) 48) (not (= (select (select |#memory_$Pointer$.offset| main_~head~1.base) 4) 0)) (= |#NULL.offset| 0) (= (select |old(#length)| 2) 18) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= 0 main_~head~1.offset) (= |#NULL.base| 0)) (and (= (select |old(#valid)| 1) 1) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (not (= main_~head~1.base 0)) (not (= main_~head~1.base |#StackHeapBarrier|)) (not (= |#StackHeapBarrier| 0)) (= 5 main_~len~0) (not (= (select (select |#memory_$Pointer$.base| main_~head~1.base) 4) 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= |#NULL.offset| 0) (= (select |old(#length)| 2) 18) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= 0 main_~head~1.offset) (= |#NULL.base| 0)))' at error location [2023-04-01 11:00:41,793 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:00:41,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:00:41,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-04-01 11:00:41,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573466117] [2023-04-01 11:00:41,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:00:41,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-04-01 11:00:41,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:00:41,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-04-01 11:00:41,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2023-04-01 11:00:41,795 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 11 states, 8 states have (on average 3.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 11:00:42,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:00:42,133 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2023-04-01 11:00:42,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-04-01 11:00:42,134 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 8 states have (on average 3.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 20 [2023-04-01 11:00:42,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:00:42,135 INFO L225 Difference]: With dead ends: 37 [2023-04-01 11:00:42,135 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 11:00:42,136 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2023-04-01 11:00:42,139 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 11:00:42,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 83 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 11:00:42,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 11:00:42,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2023-04-01 11:00:42,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 11:00:42,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2023-04-01 11:00:42,142 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 20 [2023-04-01 11:00:42,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:00:42,142 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2023-04-01 11:00:42,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 8 states have (on average 3.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 11:00:42,142 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2023-04-01 11:00:42,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-04-01 11:00:42,143 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:00:42,143 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:00:42,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-04-01 11:00:42,365 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,SelfDestructingSolverStorable3 [2023-04-01 11:00:42,366 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:00:42,366 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:00:42,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1784675428, now seen corresponding path program 3 times [2023-04-01 11:00:42,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:00:42,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728933714] [2023-04-01 11:00:42,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:00:42,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:00:42,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:00:42,543 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:00:42,543 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:00:42,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728933714] [2023-04-01 11:00:42,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728933714] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:00:42,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051157892] [2023-04-01 11:00:42,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 11:00:42,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:00:42,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:00:42,545 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) [2023-04-01 11:00:42,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-04-01 11:00:42,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 11:00:42,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:00:42,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 7 conjunts are in the unsatisfiable core [2023-04-01 11:00:42,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:00:42,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:00:42,755 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:00:42,846 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:00:42,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051157892] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:00:42,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1412518131] [2023-04-01 11:00:42,847 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 11:00:42,847 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:00:42,848 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:00:42,848 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:00:42,848 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:00:42,867 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-01 11:00:43,033 INFO L197 IcfgInterpreter]: Interpreting procedure dll_create with input of size 52 for LOIs [2023-04-01 11:00:43,381 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:00:43,384 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:00:44,319 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '786#(or (and (= (select |old(#valid)| 1) 1) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (not (= main_~head~1.base 0)) (not (= main_~head~1.base |#StackHeapBarrier|)) (not (= |#StackHeapBarrier| 0)) (= 5 main_~len~0) (= (select (select |old(#memory_int)| 1) 0) 48) (not (= (select (select |#memory_$Pointer$.offset| main_~head~1.base) 4) 0)) (= |#NULL.offset| 0) (= (select |old(#length)| 2) 18) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= 0 main_~head~1.offset) (= |#NULL.base| 0)) (and (= (select |old(#valid)| 1) 1) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (not (= main_~head~1.base 0)) (not (= main_~head~1.base |#StackHeapBarrier|)) (not (= |#StackHeapBarrier| 0)) (= 5 main_~len~0) (not (= (select (select |#memory_$Pointer$.base| main_~head~1.base) 4) 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= |#NULL.offset| 0) (= (select |old(#length)| 2) 18) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= 0 main_~head~1.offset) (= |#NULL.base| 0)))' at error location [2023-04-01 11:00:44,320 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:00:44,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:00:44,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2023-04-01 11:00:44,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780204875] [2023-04-01 11:00:44,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:00:44,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-04-01 11:00:44,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:00:44,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-04-01 11:00:44,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2023-04-01 11:00:44,334 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 13 states, 10 states have (on average 3.0) internal successors, (30), 13 states have internal predecessors, (30), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 11:00:44,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:00:44,785 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2023-04-01 11:00:44,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-04-01 11:00:44,785 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 3.0) internal successors, (30), 13 states have internal predecessors, (30), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 23 [2023-04-01 11:00:44,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:00:44,786 INFO L225 Difference]: With dead ends: 40 [2023-04-01 11:00:44,786 INFO L226 Difference]: Without dead ends: 31 [2023-04-01 11:00:44,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2023-04-01 11:00:44,794 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 24 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-04-01 11:00:44,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 80 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-04-01 11:00:44,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-04-01 11:00:44,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-04-01 11:00:44,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 11:00:44,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2023-04-01 11:00:44,809 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 23 [2023-04-01 11:00:44,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:00:44,809 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2023-04-01 11:00:44,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 3.0) internal successors, (30), 13 states have internal predecessors, (30), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-04-01 11:00:44,809 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2023-04-01 11:00:44,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-04-01 11:00:44,811 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:00:44,811 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:00:44,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-04-01 11:00:45,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:00:45,018 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:00:45,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:00:45,019 INFO L85 PathProgramCache]: Analyzing trace with hash 523757275, now seen corresponding path program 4 times [2023-04-01 11:00:45,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:00:45,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911911788] [2023-04-01 11:00:45,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:00:45,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:00:45,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:00:45,178 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:00:45,178 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:00:45,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911911788] [2023-04-01 11:00:45,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911911788] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:00:45,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593306681] [2023-04-01 11:00:45,180 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-04-01 11:00:45,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:00:45,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:00:45,198 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) [2023-04-01 11:00:45,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-04-01 11:00:45,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:00:45,402 INFO L262 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 8 conjunts are in the unsatisfiable core [2023-04-01 11:00:45,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:00:45,423 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:00:45,424 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:00:45,535 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 11:00:45,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593306681] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:00:45,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1312578573] [2023-04-01 11:00:45,537 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 11:00:45,537 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:00:45,537 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:00:45,537 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:00:45,537 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:00:45,554 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-01 11:00:45,787 INFO L197 IcfgInterpreter]: Interpreting procedure dll_create with input of size 52 for LOIs [2023-04-01 11:00:46,163 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:00:46,165 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:00:47,112 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1070#(or (and (= (select |old(#valid)| 1) 1) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (not (= main_~head~1.base 0)) (not (= main_~head~1.base |#StackHeapBarrier|)) (not (= |#StackHeapBarrier| 0)) (= 5 main_~len~0) (= (select (select |old(#memory_int)| 1) 0) 48) (not (= (select (select |#memory_$Pointer$.offset| main_~head~1.base) 4) 0)) (= |#NULL.offset| 0) (= (select |old(#length)| 2) 18) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= 0 main_~head~1.offset) (= |#NULL.base| 0)) (and (= (select |old(#valid)| 1) 1) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (not (= main_~head~1.base 0)) (not (= main_~head~1.base |#StackHeapBarrier|)) (not (= |#StackHeapBarrier| 0)) (= 5 main_~len~0) (not (= (select (select |#memory_$Pointer$.base| main_~head~1.base) 4) 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= |#NULL.offset| 0) (= (select |old(#length)| 2) 18) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= 0 main_~head~1.offset) (= |#NULL.base| 0)))' at error location [2023-04-01 11:00:47,113 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:00:47,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:00:47,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-04-01 11:00:47,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063325848] [2023-04-01 11:00:47,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:00:47,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 11:00:47,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:00:47,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 11:00:47,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2023-04-01 11:00:47,117 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 14 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 11:00:47,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:00:47,437 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2023-04-01 11:00:47,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 11:00:47,437 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2023-04-01 11:00:47,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:00:47,438 INFO L225 Difference]: With dead ends: 43 [2023-04-01 11:00:47,438 INFO L226 Difference]: Without dead ends: 34 [2023-04-01 11:00:47,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=122, Invalid=748, Unknown=0, NotChecked=0, Total=870 [2023-04-01 11:00:47,439 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 14 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 11:00:47,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 81 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 11:00:47,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-01 11:00:47,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2023-04-01 11:00:47,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 11:00:47,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2023-04-01 11:00:47,442 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 26 [2023-04-01 11:00:47,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:00:47,442 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2023-04-01 11:00:47,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 14 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 11:00:47,442 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2023-04-01 11:00:47,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 11:00:47,442 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:00:47,442 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:00:47,454 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-04-01 11:00:47,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:00:47,655 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:00:47,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:00:47,655 INFO L85 PathProgramCache]: Analyzing trace with hash 295032068, now seen corresponding path program 5 times [2023-04-01 11:00:47,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:00:47,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616969947] [2023-04-01 11:00:47,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:00:47,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:00:47,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:00:48,680 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 11:00:48,680 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:00:48,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616969947] [2023-04-01 11:00:48,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616969947] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:00:48,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569639408] [2023-04-01 11:00:48,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 11:00:48,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:00:48,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:00:48,681 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) [2023-04-01 11:00:48,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-04-01 11:00:49,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-04-01 11:00:49,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 11:00:49,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 52 conjunts are in the unsatisfiable core [2023-04-01 11:00:49,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:00:49,161 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-01 11:00:49,198 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-04-01 11:00:49,198 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 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 [2023-04-01 11:00:49,257 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 11 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 42 [2023-04-01 11:00:49,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2023-04-01 11:00:49,303 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 11:00:49,303 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:00:49,689 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:00:49,690 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 10 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 119 treesize of output 112 [2023-04-01 11:00:49,710 INFO L321 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2023-04-01 11:00:49,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 86 [2023-04-01 11:00:49,727 INFO L321 Elim1Store]: treesize reduction 21, result has 38.2 percent of original size [2023-04-01 11:00:49,727 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 77 [2023-04-01 11:00:49,783 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:00:49,783 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 104 treesize of output 72 [2023-04-01 11:00:49,792 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 7 treesize of output 3 [2023-04-01 11:00:49,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 11:00:49,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 11:00:49,887 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 11:00:49,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569639408] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:00:49,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1855770402] [2023-04-01 11:00:49,889 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 11:00:49,889 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:00:49,889 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:00:49,889 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:00:49,889 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:00:49,911 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-01 11:00:50,067 INFO L197 IcfgInterpreter]: Interpreting procedure dll_create with input of size 52 for LOIs [2023-04-01 11:00:50,430 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:00:50,432 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:00:51,803 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1387#(or (and (= (select |old(#valid)| 1) 1) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (not (= main_~head~1.base 0)) (not (= main_~head~1.base |#StackHeapBarrier|)) (not (= |#StackHeapBarrier| 0)) (= 5 main_~len~0) (= (select (select |old(#memory_int)| 1) 0) 48) (not (= (select (select |#memory_$Pointer$.offset| main_~head~1.base) 4) 0)) (= |#NULL.offset| 0) (= (select |old(#length)| 2) 18) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= 0 main_~head~1.offset) (= |#NULL.base| 0)) (and (= (select |old(#valid)| 1) 1) (= (select |old(#length)| 1) 2) (= (select |old(#valid)| 0) 0) (not (= main_~head~1.base 0)) (not (= main_~head~1.base |#StackHeapBarrier|)) (not (= |#StackHeapBarrier| 0)) (= 5 main_~len~0) (not (= (select (select |#memory_$Pointer$.base| main_~head~1.base) 4) 0)) (= (select (select |old(#memory_int)| 1) 0) 48) (= |#NULL.offset| 0) (= (select |old(#length)| 2) 18) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= 0 main_~head~1.offset) (= |#NULL.base| 0)))' at error location [2023-04-01 11:00:51,803 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:00:51,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:00:51,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 21 [2023-04-01 11:00:51,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614911586] [2023-04-01 11:00:51,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:00:51,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-04-01 11:00:51,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:00:51,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-04-01 11:00:51,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1160, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 11:00:51,805 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 11:00:52,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:00:52,492 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2023-04-01 11:00:52,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-04-01 11:00:52,493 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2023-04-01 11:00:52,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:00:52,493 INFO L225 Difference]: With dead ends: 41 [2023-04-01 11:00:52,493 INFO L226 Difference]: Without dead ends: 39 [2023-04-01 11:00:52,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=160, Invalid=1562, Unknown=0, NotChecked=0, Total=1722 [2023-04-01 11:00:52,494 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 15 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-04-01 11:00:52,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 148 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-04-01 11:00:52,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-04-01 11:00:52,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2023-04-01 11:00:52,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 11:00:52,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2023-04-01 11:00:52,498 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 29 [2023-04-01 11:00:52,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:00:52,499 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2023-04-01 11:00:52,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 19 states have internal predecessors, (37), 1 states have call successors, (3), 1 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 1 states have call successors, (3) [2023-04-01 11:00:52,499 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2023-04-01 11:00:52,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-04-01 11:00:52,499 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:00:52,499 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:00:52,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-04-01 11:00:52,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:00:52,707 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:00:52,707 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:00:52,707 INFO L85 PathProgramCache]: Analyzing trace with hash 552699723, now seen corresponding path program 1 times [2023-04-01 11:00:52,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:00:52,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275477623] [2023-04-01 11:00:52,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:00:52,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:00:52,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:00:53,504 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 18 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-04-01 11:00:53,505 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:00:53,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275477623] [2023-04-01 11:00:53,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275477623] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:00:53,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428190486] [2023-04-01 11:00:53,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:00:53,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:00:53,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:00:53,525 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) [2023-04-01 11:00:53,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-04-01 11:00:53,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:00:53,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 586 conjuncts, 45 conjunts are in the unsatisfiable core [2023-04-01 11:00:53,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:00:53,772 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-01 11:00:53,783 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-04-01 11:00:53,786 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 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 [2023-04-01 11:00:53,799 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 21 [2023-04-01 11:00:53,805 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-04-01 11:00:53,806 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2023-04-01 11:00:53,879 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:00:53,880 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2023-04-01 11:00:53,891 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 11:00:53,892 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:00:54,080 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:00:54,081 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 4 case distinctions, treesize of input 75 treesize of output 89 [2023-04-01 11:00:54,099 INFO L321 Elim1Store]: treesize reduction 10, result has 70.6 percent of original size [2023-04-01 11:00:54,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 86 [2023-04-01 11:00:54,119 INFO L321 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2023-04-01 11:00:54,119 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 91 [2023-04-01 11:00:54,129 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:00:54,129 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 28 [2023-04-01 11:00:54,174 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 17 treesize of output 9 [2023-04-01 11:00:54,182 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-04-01 11:00:54,183 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 24 [2023-04-01 11:00:54,185 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 8 treesize of output 4 [2023-04-01 11:00:54,189 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:00:54,189 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 42 treesize of output 24 [2023-04-01 11:00:54,264 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-04-01 11:00:54,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428190486] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:00:54,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [156621890] [2023-04-01 11:00:54,299 INFO L159 IcfgInterpreter]: Started Sifa with 18 locations of interest [2023-04-01 11:00:54,299 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:00:54,299 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:00:54,299 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:00:54,299 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:00:54,326 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-01 11:00:54,577 INFO L197 IcfgInterpreter]: Interpreting procedure dll_create with input of size 52 for LOIs [2023-04-01 11:00:54,959 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:00:54,961 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:00:56,420 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1725#(and (= (select (select |#memory_$Pointer$.offset| main_~head~1.base) 4) 0) (= (select (select |#memory_$Pointer$.base| main_~head~1.base) 4) 0) (= main_~temp~0.offset (select (select |#memory_$Pointer$.offset| main_~head~1.base) 12)) (= (select |old(#valid)| 1) 1) (exists ((|v_main_#t~mem15_18| Int) (|v_main_#t~mem15_19| Int) (|v_main_#t~short16_17| Bool) (|v_main_#t~short16_25| Bool) (|v_main_#t~mem17_10| Int) (|v_main_#t~short18_12| Bool) (|v_main_#t~mem17_11| Int)) (and (or (and |v_main_#t~short16_17| (not (= (select (select |#memory_int| main_~head~1.base) 0) 0))) (and (= (select (select |#memory_int| main_~head~1.base) 0) 0) (not |v_main_#t~short16_17|))) (or (and (= |v_main_#t~mem15_19| |v_main_#t~mem15_18|) |v_main_#t~short16_17| |v_main_#t~short16_25|) (and (or (and (= 0 |v_main_#t~mem15_19|) (not |v_main_#t~short16_25|)) (and |v_main_#t~short16_25| (not (= 0 |v_main_#t~mem15_19|)))) (= (select (select |#memory_int| main_~head~1.base) 8) |v_main_#t~mem15_19|) (not |v_main_#t~short16_17|))) (or (and (= |v_main_#t~mem17_11| |v_main_#t~mem17_10|) |v_main_#t~short18_12|) (and (not |v_main_#t~short18_12|) (not (= 0 |v_main_#t~mem17_11|)) (= (select (select |#memory_int| main_~head~1.base) 16) |v_main_#t~mem17_11|))) (or (and |v_main_#t~short18_12| |v_main_#t~short16_25|) (and (not |v_main_#t~short18_12|) (not |v_main_#t~short16_25|))))) (= (select |old(#length)| 1) 2) (= main_~temp~0.base (select (select |#memory_$Pointer$.base| main_~head~1.base) 12)) (= (select |old(#valid)| 0) 0) (not (= main_~head~1.base 0)) (not (= main_~head~1.base |#StackHeapBarrier|)) (not (= |#StackHeapBarrier| 0)) (= 5 main_~len~0) (= (select (select |old(#memory_int)| 1) 0) 48) (= |#NULL.offset| 0) (= (select |old(#length)| 2) 18) (= (select (select |old(#memory_int)| 1) 1) 0) (= (select |old(#valid)| 2) 1) (= 0 main_~head~1.offset) (= |#NULL.base| 0))' at error location [2023-04-01 11:00:56,421 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:00:56,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:00:56,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 23 [2023-04-01 11:00:56,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145254117] [2023-04-01 11:00:56,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:00:56,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-04-01 11:00:56,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:00:56,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-04-01 11:00:56,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2023-04-01 11:00:56,422 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 23 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 1 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 11:00:57,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:00:57,413 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2023-04-01 11:00:57,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-04-01 11:00:57,414 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 1 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2023-04-01 11:00:57,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:00:57,416 INFO L225 Difference]: With dead ends: 39 [2023-04-01 11:00:57,417 INFO L226 Difference]: Without dead ends: 35 [2023-04-01 11:00:57,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=184, Invalid=1886, Unknown=0, NotChecked=0, Total=2070 [2023-04-01 11:00:57,420 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 20 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-04-01 11:00:57,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 194 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-04-01 11:00:57,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-04-01 11:00:57,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-04-01 11:00:57,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 11:00:57,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2023-04-01 11:00:57,430 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 30 [2023-04-01 11:00:57,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:00:57,430 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2023-04-01 11:00:57,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 1 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 11:00:57,431 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2023-04-01 11:00:57,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-04-01 11:00:57,432 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:00:57,441 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:00:57,449 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-04-01 11:00:57,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:00:57,647 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:00:57,647 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:00:57,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1797537033, now seen corresponding path program 1 times [2023-04-01 11:00:57,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:00:57,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780607282] [2023-04-01 11:00:57,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:00:57,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:00:57,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:00:59,420 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 11:00:59,421 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:00:59,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780607282] [2023-04-01 11:00:59,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780607282] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:00:59,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599274986] [2023-04-01 11:00:59,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:00:59,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:00:59,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:00:59,422 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:00:59,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-04-01 11:00:59,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:00:59,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 594 conjuncts, 95 conjunts are in the unsatisfiable core [2023-04-01 11:00:59,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:00:59,716 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-01 11:00:59,735 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-04-01 11:00:59,735 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-04-01 11:00:59,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 12 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 42 [2023-04-01 11:00:59,782 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2023-04-01 11:00:59,830 INFO L321 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2023-04-01 11:00:59,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2023-04-01 11:00:59,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 11:00:59,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 29 [2023-04-01 11:00:59,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 21 [2023-04-01 11:00:59,870 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2023-04-01 11:00:59,877 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-04-01 11:00:59,878 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 51 [2023-04-01 11:00:59,884 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 54 [2023-04-01 11:00:59,890 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2023-04-01 11:01:00,091 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 36 [2023-04-01 11:01:00,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 11:01:00,134 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 24 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 11:01:00,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:01:01,147 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:01:01,147 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 115 treesize of output 135 [2023-04-01 11:01:01,178 INFO L321 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2023-04-01 11:01:01,179 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 115 treesize of output 130 [2023-04-01 11:01:01,190 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:01:01,190 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 4 case distinctions, treesize of input 82 treesize of output 96 [2023-04-01 11:01:01,207 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:01:01,207 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 77 treesize of output 84 [2023-04-01 11:01:01,238 INFO L321 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2023-04-01 11:01:01,239 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 2 case distinctions, treesize of input 10 treesize of output 18 [2023-04-01 11:01:01,254 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 119 [2023-04-01 11:01:01,284 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 14 treesize of output 10 [2023-04-01 11:01:01,289 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 14 treesize of output 10 [2023-04-01 11:01:01,293 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 14 treesize of output 10 [2023-04-01 11:01:01,323 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 35 treesize of output 31 [2023-04-01 11:01:01,327 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 33 treesize of output 29 [2023-04-01 11:01:01,331 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 35 treesize of output 31 [2023-04-01 11:01:01,345 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 17 treesize of output 9 [2023-04-01 11:01:01,354 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 267 treesize of output 247 [2023-04-01 11:01:01,537 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:01:01,537 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 937 treesize of output 925 [2023-04-01 11:01:01,565 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:01:01,565 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 17 treesize of output 9 [2023-04-01 11:01:01,572 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 21 treesize of output 17 [2023-04-01 11:01:01,601 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:01:01,601 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 72 treesize of output 52 [2023-04-01 11:01:01,613 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:01:01,614 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 76 treesize of output 60 [2023-04-01 11:01:01,618 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 19 treesize of output 15 [2023-04-01 11:01:01,642 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:01:01,642 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 74 treesize of output 54 [2023-04-01 11:01:01,655 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:01:01,655 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 82 treesize of output 66 [2023-04-01 11:01:01,658 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 21 treesize of output 17 [2023-04-01 11:01:01,664 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 21 treesize of output 17 [2023-04-01 11:01:01,668 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 29 treesize of output 25 [2023-04-01 11:01:01,671 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 29 treesize of output 25 [2023-04-01 11:01:01,674 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 27 treesize of output 23 [2023-04-01 11:01:01,678 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 19 treesize of output 15 [2023-04-01 11:01:01,699 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:01:01,699 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 82 treesize of output 66 [2023-04-01 11:01:01,702 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 21 treesize of output 17 [2023-04-01 11:01:01,709 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:01:01,709 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 74 treesize of output 54 [2023-04-01 11:01:01,729 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (= c_dll_create_~head~0.base 0)) (.cse0 (= c_dll_create_~head~0.offset 0))) (and (or (not .cse0) (and (forall ((v_prenex_8 (Array Int Int)) (v_arrayElimCell_41 Int)) (= (select (select (store |c_#memory_int| c_dll_create_~new_head~0.base v_prenex_8) v_arrayElimCell_41) 16) 0)) (forall ((v_ArrVal_2362 (Array Int Int)) (v_arrayElimCell_42 Int)) (= (select (select (store |c_#memory_int| c_dll_create_~new_head~0.base v_ArrVal_2362) v_arrayElimCell_42) 0) 0)) (forall ((v_arrayElimCell_40 Int) (v_prenex_7 (Array Int Int))) (= (select (select (store |c_#memory_int| c_dll_create_~new_head~0.base v_prenex_7) v_arrayElimCell_40) 8) 0))) (not .cse1)) (or (let ((.cse15 (+ c_dll_create_~head~0.offset 8)) (.cse2 (= c_dll_create_~head~0.base c_dll_create_~new_head~0.base)) (.cse10 (+ c_dll_create_~head~0.offset 16))) (let ((.cse3 (forall ((v_prenex_14 (Array Int Int))) (= (select (select (store |c_#memory_int| c_dll_create_~new_head~0.base v_prenex_14) c_dll_create_~head~0.base) .cse10) 0))) (.cse8 (forall ((v_prenex_2 (Array Int Int))) (= (select (select (store |c_#memory_int| c_dll_create_~new_head~0.base v_prenex_2) c_dll_create_~head~0.base) c_dll_create_~head~0.offset) 0))) (.cse4 (not .cse2)) (.cse6 (+ c_dll_create_~head~0.offset 12)) (.cse5 (forall ((v_prenex_18 (Array Int Int))) (= 0 (select (select (store |c_#memory_int| c_dll_create_~new_head~0.base v_prenex_18) c_dll_create_~head~0.base) .cse15))))) (and (or .cse2 .cse3) (or .cse4 .cse5) (or .cse4 (forall ((v_prenex_33 Int) (v_prenex_34 (Array Int Int)) (v_arrayElimCell_54 Int)) (= (select (store (select (store |c_#memory_int| c_dll_create_~new_head~0.base v_prenex_34) c_dll_create_~head~0.base) .cse6 v_prenex_33) (+ 16 v_arrayElimCell_54)) 0))) (or .cse2 (and (forall ((v_ArrVal_2355 Int) (v_prenex_2 (Array Int Int)) (v_arrayElimCell_59 Int)) (let ((.cse7 (select (store |c_#memory_int| c_dll_create_~new_head~0.base v_prenex_2) c_dll_create_~head~0.base))) (or (= (select .cse7 c_dll_create_~head~0.offset) 0) (= (select (store .cse7 .cse6 v_ArrVal_2355) v_arrayElimCell_59) 0)))) (forall ((v_prenex_52 (Array Int Int))) (= (select (select (store |c_#memory_int| c_dll_create_~new_head~0.base v_prenex_52) c_dll_create_~head~0.base) c_dll_create_~head~0.offset) 0)))) (or .cse2 .cse5) (or .cse4 .cse3) (or .cse2 .cse8) (or .cse4 .cse8) (or .cse4 (forall ((v_prenex_37 Int) (v_prenex_40 (Array Int Int)) (v_arrayElimCell_69 Int)) (= (select (store (select (store |c_#memory_int| c_dll_create_~new_head~0.base v_prenex_40) c_dll_create_~head~0.base) .cse6 v_prenex_37) v_arrayElimCell_69) 0))) (or .cse2 (and (forall ((v_prenex_13 Int) (v_prenex_14 (Array Int Int)) (v_arrayElimCell_64 Int)) (let ((.cse9 (select (store |c_#memory_int| c_dll_create_~new_head~0.base v_prenex_14) c_dll_create_~head~0.base))) (or (= (select (store .cse9 .cse6 v_prenex_13) (+ 16 v_arrayElimCell_64)) 0) (= (select .cse9 .cse10) 0)))) (forall ((v_prenex_62 (Array Int Int))) (= (select (select (store |c_#memory_int| c_dll_create_~new_head~0.base v_prenex_62) c_dll_create_~head~0.base) .cse10) 0)))) (or (forall ((v_prenex_23 Int) (v_arrayElimCell_65 Int) (v_prenex_26 (Array Int Int))) (= (select (store (select (store |c_#memory_int| c_dll_create_~new_head~0.base v_prenex_26) c_dll_create_~head~0.base) .cse6 v_prenex_23) (+ 8 v_arrayElimCell_65)) 0)) .cse4) (or .cse4 (and (forall ((v_prenex_10 (Array Int Int)) (v_arrayElimCell_45 Int) (v_arrayElimCell_67 Int) (v_prenex_9 Int)) (= (select (select (let ((.cse11 (store |c_#memory_int| c_dll_create_~new_head~0.base v_prenex_10))) (store .cse11 c_dll_create_~head~0.base (store (select .cse11 c_dll_create_~head~0.base) .cse6 v_prenex_9))) v_arrayElimCell_45) (+ 8 v_arrayElimCell_67)) 0)) (forall ((v_prenex_11 Int) (v_arrayElimCell_68 Int) (v_prenex_12 (Array Int Int)) (v_arrayElimCell_44 Int)) (= (select (select (let ((.cse12 (store |c_#memory_int| c_dll_create_~new_head~0.base v_prenex_12))) (store .cse12 c_dll_create_~head~0.base (store (select .cse12 c_dll_create_~head~0.base) .cse6 v_prenex_11))) v_arrayElimCell_44) v_arrayElimCell_68) 0)) (forall ((v_prenex_15 Int) (v_arrayElimCell_43 Int) (v_prenex_16 (Array Int Int)) (v_arrayElimCell_66 Int)) (= (select (select (let ((.cse13 (store |c_#memory_int| c_dll_create_~new_head~0.base v_prenex_16))) (store .cse13 c_dll_create_~head~0.base (store (select .cse13 c_dll_create_~head~0.base) .cse6 v_prenex_15))) v_arrayElimCell_43) (+ 16 v_arrayElimCell_66)) 0)))) (or .cse2 (and (forall ((v_prenex_72 (Array Int Int)) (v_arrayElimCell_72 Int) (v_prenex_71 Int)) (let ((.cse14 (select (store |c_#memory_int| c_dll_create_~new_head~0.base v_prenex_72) c_dll_create_~head~0.base))) (or (= (select (store .cse14 .cse6 v_prenex_71) (+ 8 v_arrayElimCell_72)) 0) (= (select .cse14 .cse15) 0)))) .cse5))))) (and .cse1 .cse0)))) is different from false [2023-04-01 11:01:01,907 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-04-01 11:01:02,177 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:01:02,178 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 1 new quantified variables, introduced 5 case distinctions, treesize of input 119 treesize of output 112 [2023-04-01 11:01:02,192 INFO L321 Elim1Store]: treesize reduction 10, result has 70.6 percent of original size [2023-04-01 11:01:02,192 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 63 treesize of output 97 [2023-04-01 11:01:02,208 INFO L321 Elim1Store]: treesize reduction 10, result has 70.6 percent of original size [2023-04-01 11:01:02,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 54 treesize of output 83 [2023-04-01 11:01:02,266 INFO L321 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2023-04-01 11:01:02,267 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 40 [2023-04-01 11:01:02,271 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2023-04-01 11:01:02,294 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:01:02,294 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 197 treesize of output 178 [2023-04-01 11:01:02,299 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 109 treesize of output 107 [2023-04-01 11:01:02,304 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 107 treesize of output 103 [2023-04-01 11:01:02,308 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 103 treesize of output 99 [2023-04-01 11:01:02,313 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 99 treesize of output 97 [2023-04-01 11:01:02,905 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 24 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 4 not checked. [2023-04-01 11:01:02,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599274986] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 11:01:02,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1611561284] [2023-04-01 11:01:02,906 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2023-04-01 11:01:02,906 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 11:01:02,906 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 11:01:02,906 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 11:01:02,906 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 11:01:02,922 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 49 for LOIs [2023-04-01 11:01:03,107 INFO L197 IcfgInterpreter]: Interpreting procedure dll_create with input of size 52 for LOIs [2023-04-01 11:01:03,447 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 11:01:03,449 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 11:01:04,536 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '2084#(exists ((|v_main_#t~short10_18| Bool) (|v_main_#t~short8_15| Bool) (|v_main_#t~mem9_41| Int) (|v_main_#t~mem9_40| Int) (|v_main_#t~short8_50| Bool) (|v_main_#t~mem7_36| Int) (|v_main_#t~mem7_37| Int)) (and (or (and (not |v_main_#t~short10_18|) (= |v_main_#t~mem9_41| (select (select |#memory_int| main_~head~1.base) (+ 16 main_~head~1.offset))) (not (= |v_main_#t~mem9_41| 0))) (and |v_main_#t~short10_18| (= |v_main_#t~mem9_41| |v_main_#t~mem9_40|))) (or (and |v_main_#t~short8_15| (not (= (select (select |#memory_int| main_~head~1.base) main_~head~1.offset) 0))) (and (= (select (select |#memory_int| main_~head~1.base) main_~head~1.offset) 0) (not |v_main_#t~short8_15|))) (or (and |v_main_#t~short10_18| |v_main_#t~short8_50|) (and (not |v_main_#t~short8_50|) (not |v_main_#t~short10_18|))) (or (and (= |v_main_#t~mem7_37| |v_main_#t~mem7_36|) |v_main_#t~short8_15| |v_main_#t~short8_50|) (and (= (select (select |#memory_int| main_~head~1.base) (+ 8 main_~head~1.offset)) |v_main_#t~mem7_37|) (or (and (not (= |v_main_#t~mem7_37| 0)) |v_main_#t~short8_50|) (and (not |v_main_#t~short8_50|) (= |v_main_#t~mem7_37| 0))) (not |v_main_#t~short8_15|)))))' at error location [2023-04-01 11:01:04,536 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 11:01:04,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 11:01:04,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 32 [2023-04-01 11:01:04,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519881103] [2023-04-01 11:01:04,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 11:01:04,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-04-01 11:01:04,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 11:01:04,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-04-01 11:01:04,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1757, Unknown=1, NotChecked=84, Total=1980 [2023-04-01 11:01:04,538 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 32 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 1 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 11:01:10,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 11:01:10,778 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2023-04-01 11:01:10,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 11:01:10,778 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 1 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) Word has length 32 [2023-04-01 11:01:10,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 11:01:10,780 INFO L225 Difference]: With dead ends: 44 [2023-04-01 11:01:10,780 INFO L226 Difference]: Without dead ends: 42 [2023-04-01 11:01:10,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=267, Invalid=2598, Unknown=1, NotChecked=104, Total=2970 [2023-04-01 11:01:10,783 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 23 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 4 mSolverCounterUnsat, 32 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 32 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-04-01 11:01:10,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 217 Invalid, 452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 392 Invalid, 32 Unknown, 24 Unchecked, 4.3s Time] [2023-04-01 11:01:10,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-04-01 11:01:10,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2023-04-01 11:01:10,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-04-01 11:01:10,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2023-04-01 11:01:10,790 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 32 [2023-04-01 11:01:10,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 11:01:10,790 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2023-04-01 11:01:10,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 29 states have (on average 1.896551724137931) internal successors, (55), 29 states have internal predecessors, (55), 1 states have call successors, (3), 1 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 1 states have call successors, (4) [2023-04-01 11:01:10,790 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2023-04-01 11:01:10,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-04-01 11:01:10,791 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 11:01:10,791 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 11:01:10,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-04-01 11:01:11,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:01:11,013 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 11:01:11,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 11:01:11,014 INFO L85 PathProgramCache]: Analyzing trace with hash -114286618, now seen corresponding path program 1 times [2023-04-01 11:01:11,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 11:01:11,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584817590] [2023-04-01 11:01:11,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:01:11,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 11:01:11,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:01:12,608 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-04-01 11:01:12,609 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 11:01:12,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584817590] [2023-04-01 11:01:12,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584817590] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 11:01:12,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967248332] [2023-04-01 11:01:12,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 11:01:12,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 11:01:12,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 11:01:12,617 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-04-01 11:01:12,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-04-01 11:01:12,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 11:01:12,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 98 conjunts are in the unsatisfiable core [2023-04-01 11:01:12,969 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 11:01:12,974 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-01 11:01:12,994 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2023-04-01 11:01:12,994 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2023-04-01 11:01:13,035 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 4 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 21 [2023-04-01 11:01:13,043 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-04-01 11:01:13,043 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 40 [2023-04-01 11:01:13,086 INFO L321 Elim1Store]: treesize reduction 8, result has 61.9 percent of original size [2023-04-01 11:01:13,086 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 22 [2023-04-01 11:01:13,144 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 28 [2023-04-01 11:01:13,148 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2023-04-01 11:01:13,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 11:01:13,151 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 41 [2023-04-01 11:01:13,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 40 treesize of output 42 [2023-04-01 11:01:13,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 11:01:13,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2023-04-01 11:01:13,348 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-04-01 11:01:13,391 INFO L321 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2023-04-01 11:01:13,391 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 78 treesize of output 33 [2023-04-01 11:01:13,394 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 11:01:13,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 11:01:14,200 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:01:14,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 117 treesize of output 170 [2023-04-01 11:01:14,220 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:01:14,221 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 97 treesize of output 117 [2023-04-01 11:01:14,337 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:01:14,337 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 49 treesize of output 17 [2023-04-01 11:01:14,350 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:01:14,350 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 196 treesize of output 184 [2023-04-01 11:01:14,356 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 114 treesize of output 110 [2023-04-01 11:01:14,391 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:01:14,391 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 204 treesize of output 192 [2023-04-01 11:01:14,603 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 13 treesize of output 9 [2023-04-01 11:01:14,638 INFO L321 Elim1Store]: treesize reduction 26, result has 63.4 percent of original size [2023-04-01 11:01:14,638 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 94 [2023-04-01 11:01:14,706 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:01:14,707 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 15 treesize of output 17 [2023-04-01 11:01:19,050 INFO L321 Elim1Store]: treesize reduction 10, result has 70.6 percent of original size [2023-04-01 11:01:19,051 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 121 [2023-04-01 11:01:19,063 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:01:19,064 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 78 treesize of output 98 [2023-04-01 11:01:19,081 INFO L321 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2023-04-01 11:01:19,081 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 2 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 93 [2023-04-01 11:01:19,186 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 17 treesize of output 9 [2023-04-01 11:01:19,270 INFO L321 Elim1Store]: treesize reduction 88, result has 46.0 percent of original size [2023-04-01 11:01:19,270 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 353 treesize of output 401 [2023-04-01 11:01:19,295 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:01:19,296 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 354 treesize of output 360 [2023-04-01 11:01:19,312 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:01:19,313 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 340 treesize of output 328 [2023-04-01 11:01:19,322 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 286 treesize of output 282 [2023-04-01 11:01:19,333 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 282 treesize of output 278 [2023-04-01 11:01:20,683 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 17 treesize of output 9 [2023-04-01 11:01:20,822 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 17 treesize of output 9 [2023-04-01 11:01:20,912 WARN L207 Elim1Store]: Array PQE input equivalent to true [2023-04-01 11:01:20,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 17 treesize of output 9 [2023-04-01 11:01:21,660 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 17 treesize of output 9 [2023-04-01 11:01:21,680 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 17 treesize of output 9 [2023-04-01 11:01:21,779 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 17 treesize of output 9 [2023-04-01 11:01:21,801 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 17 treesize of output 9 [2023-04-01 11:01:21,915 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 17 treesize of output 9 [2023-04-01 11:01:22,002 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 17 treesize of output 9 [2023-04-01 11:01:22,087 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 17 treesize of output 9 [2023-04-01 11:01:22,109 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 17 treesize of output 9 [2023-04-01 11:01:22,395 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 17 treesize of output 9 [2023-04-01 11:01:22,402 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 17 treesize of output 9 [2023-04-01 11:01:22,446 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:01:22,447 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 63 treesize of output 69 [2023-04-01 11:01:22,501 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:01:22,502 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 149 treesize of output 177 [2023-04-01 11:01:22,622 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 17 treesize of output 9 [2023-04-01 11:01:22,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 17 treesize of output 9 [2023-04-01 11:01:22,699 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:01:22,699 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 150 treesize of output 178 [2023-04-01 11:01:22,911 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 17 treesize of output 9 [2023-04-01 11:01:22,957 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 17 treesize of output 9 [2023-04-01 11:01:22,979 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:01:22,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 68 treesize of output 74 [2023-04-01 11:01:23,078 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:01:23,079 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 149 treesize of output 177 [2023-04-01 11:01:23,239 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 11:01:23,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 168 treesize of output 192