/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 OctagonDomain -i ../sv-benchmarks/c/list-simple/dll2n_remove_all.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 04:54:47,170 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 04:54:47,171 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 04:54:47,201 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 04:54:47,201 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 04:54:47,203 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 04:54:47,206 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 04:54:47,209 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 04:54:47,210 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 04:54:47,214 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 04:54:47,216 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 04:54:47,217 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 04:54:47,217 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 04:54:47,219 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 04:54:47,220 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 04:54:47,220 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 04:54:47,221 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 04:54:47,222 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 04:54:47,223 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 04:54:47,227 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 04:54:47,228 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 04:54:47,228 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 04:54:47,229 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 04:54:47,230 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 04:54:47,234 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 04:54:47,235 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 04:54:47,235 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 04:54:47,236 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 04:54:47,236 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 04:54:47,237 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 04:54:47,237 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 04:54:47,237 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 04:54:47,238 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 04:54:47,239 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 04:54:47,239 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 04:54:47,239 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 04:54:47,240 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 04:54:47,240 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 04:54:47,240 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 04:54:47,241 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 04:54:47,241 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 04:54:47,242 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 04:54:47,265 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 04:54:47,265 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 04:54:47,265 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 04:54:47,265 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 04:54:47,266 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 04:54:47,266 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 04:54:47,266 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 04:54:47,266 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 04:54:47,267 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 04:54:47,267 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 04:54:47,267 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 04:54:47,267 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 04:54:47,267 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 04:54:47,267 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 04:54:47,268 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 04:54:47,268 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 04:54:47,268 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 04:54:47,268 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 04:54:47,268 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 04:54:47,268 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 04:54:47,268 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 04:54:47,268 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 04:54:47,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 04:54:47,269 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 04:54:47,269 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 04:54:47,269 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 04:54:47,269 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 04:54:47,269 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 04:54:47,269 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 04:54:47,269 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 04:54:47,269 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 04:54:47,270 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 04:54:47,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:54:47,270 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 04:54:47,270 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 04:54:47,270 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 04:54:47,270 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 04:54:47,270 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 04:54:47,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 04:54:47,270 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 04:54:47,270 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 04:54:47,270 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> OctagonDomain [2023-04-01 04:54:47,444 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 04:54:47,473 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 04:54:47,475 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 04:54:47,475 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 04:54:47,476 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 04:54:47,477 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2n_remove_all.i [2023-04-01 04:54:48,546 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 04:54:48,794 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 04:54:48,795 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2n_remove_all.i [2023-04-01 04:54:48,806 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b4938f74/7d601f82ce8643f3b89fb21a5cf90b9b/FLAGf01367b18 [2023-04-01 04:54:48,821 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b4938f74/7d601f82ce8643f3b89fb21a5cf90b9b [2023-04-01 04:54:48,823 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 04:54:48,825 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 04:54:48,827 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 04:54:48,827 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 04:54:48,829 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 04:54:48,830 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:54:48" (1/1) ... [2023-04-01 04:54:48,831 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6724ddf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:54:48, skipping insertion in model container [2023-04-01 04:54:48,831 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 04:54:48" (1/1) ... [2023-04-01 04:54:48,836 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 04:54:48,869 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 04:54:49,029 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2n_remove_all.i[24090,24103] [2023-04-01 04:54:49,032 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:54:49,053 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 04:54:49,104 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2n_remove_all.i[24090,24103] [2023-04-01 04:54:49,105 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 04:54:49,128 INFO L208 MainTranslator]: Completed translation [2023-04-01 04:54:49,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:54:49 WrapperNode [2023-04-01 04:54:49,129 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 04:54:49,129 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 04:54:49,130 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 04:54:49,130 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 04:54:49,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:54:49" (1/1) ... [2023-04-01 04:54:49,138 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:54:49" (1/1) ... [2023-04-01 04:54:49,153 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:54:49" (1/1) ... [2023-04-01 04:54:49,153 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:54:49" (1/1) ... [2023-04-01 04:54:49,173 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:54:49" (1/1) ... [2023-04-01 04:54:49,177 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:54:49" (1/1) ... [2023-04-01 04:54:49,179 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:54:49" (1/1) ... [2023-04-01 04:54:49,190 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:54:49" (1/1) ... [2023-04-01 04:54:49,194 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 04:54:49,195 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 04:54:49,195 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 04:54:49,195 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 04:54:49,195 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:54:49" (1/1) ... [2023-04-01 04:54:49,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 04:54:49,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:54:49,218 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 04:54:49,238 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 04:54:49,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 04:54:49,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 04:54:49,249 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 04:54:49,249 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2023-04-01 04:54:49,250 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2023-04-01 04:54:49,250 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-04-01 04:54:49,251 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-04-01 04:54:49,251 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_create [2023-04-01 04:54:49,251 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_remove_first [2023-04-01 04:54:49,251 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 04:54:49,251 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 04:54:49,251 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 04:54:49,251 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 04:54:49,251 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 04:54:49,251 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 04:54:49,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 04:54:49,251 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2023-04-01 04:54:49,252 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2023-04-01 04:54:49,252 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-04-01 04:54:49,252 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-04-01 04:54:49,252 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-04-01 04:54:49,252 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-04-01 04:54:49,252 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-04-01 04:54:49,252 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-04-01 04:54:49,252 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-04-01 04:54:49,252 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-04-01 04:54:49,252 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-04-01 04:54:49,253 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-04-01 04:54:49,253 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-04-01 04:54:49,253 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-04-01 04:54:49,253 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-04-01 04:54:49,253 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-04-01 04:54:49,253 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-04-01 04:54:49,253 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-04-01 04:54:49,253 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-04-01 04:54:49,253 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-04-01 04:54:49,253 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-04-01 04:54:49,253 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-04-01 04:54:49,254 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-04-01 04:54:49,254 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-04-01 04:54:49,254 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-04-01 04:54:49,254 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-04-01 04:54:49,254 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-04-01 04:54:49,254 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-04-01 04:54:49,254 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-04-01 04:54:49,255 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-04-01 04:54:49,255 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-04-01 04:54:49,255 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-04-01 04:54:49,255 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-04-01 04:54:49,256 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-04-01 04:54:49,256 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-04-01 04:54:49,256 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-04-01 04:54:49,256 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-04-01 04:54:49,256 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-04-01 04:54:49,256 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-04-01 04:54:49,256 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-04-01 04:54:49,257 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-04-01 04:54:49,257 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-04-01 04:54:49,257 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-04-01 04:54:49,258 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-04-01 04:54:49,258 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-04-01 04:54:49,258 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-04-01 04:54:49,258 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-04-01 04:54:49,258 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-04-01 04:54:49,258 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-04-01 04:54:49,258 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-04-01 04:54:49,258 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-04-01 04:54:49,258 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-04-01 04:54:49,258 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 04:54:49,258 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-04-01 04:54:49,259 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-04-01 04:54:49,259 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 04:54:49,259 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-04-01 04:54:49,259 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-04-01 04:54:49,259 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-04-01 04:54:49,259 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-04-01 04:54:49,259 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2023-04-01 04:54:49,259 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-04-01 04:54:49,259 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2023-04-01 04:54:49,259 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-04-01 04:54:49,259 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 04:54:49,259 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2023-04-01 04:54:49,260 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-04-01 04:54:49,260 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-04-01 04:54:49,260 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-04-01 04:54:49,260 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-04-01 04:54:49,260 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-04-01 04:54:49,260 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-04-01 04:54:49,261 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-04-01 04:54:49,261 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-04-01 04:54:49,261 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-04-01 04:54:49,261 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-04-01 04:54:49,261 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-04-01 04:54:49,261 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-04-01 04:54:49,261 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-04-01 04:54:49,261 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-04-01 04:54:49,261 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-04-01 04:54:49,261 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-04-01 04:54:49,261 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-04-01 04:54:49,261 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-04-01 04:54:49,261 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-04-01 04:54:49,261 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-04-01 04:54:49,261 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-04-01 04:54:49,262 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-04-01 04:54:49,262 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-04-01 04:54:49,262 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-04-01 04:54:49,262 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-04-01 04:54:49,262 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-04-01 04:54:49,262 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-04-01 04:54:49,262 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-04-01 04:54:49,262 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-04-01 04:54:49,262 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-04-01 04:54:49,262 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-04-01 04:54:49,262 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-04-01 04:54:49,263 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-04-01 04:54:49,263 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-04-01 04:54:49,263 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-04-01 04:54:49,264 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-04-01 04:54:49,264 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-04-01 04:54:49,264 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-04-01 04:54:49,264 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-04-01 04:54:49,264 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-04-01 04:54:49,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 04:54:49,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 04:54:49,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 04:54:49,265 INFO L130 BoogieDeclarations]: Found specification of procedure dll_create [2023-04-01 04:54:49,265 INFO L130 BoogieDeclarations]: Found specification of procedure dll_remove_first [2023-04-01 04:54:49,265 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 04:54:49,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 04:54:49,265 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 04:54:49,265 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 04:54:49,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-04-01 04:54:49,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 04:54:49,265 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 04:54:49,265 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 04:54:49,265 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 04:54:49,483 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 04:54:49,488 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 04:54:49,526 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-04-01 04:54:49,634 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 04:54:49,703 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 04:54:49,704 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-04-01 04:54:49,706 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:54:49 BoogieIcfgContainer [2023-04-01 04:54:49,706 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 04:54:49,710 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 04:54:49,710 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 04:54:49,712 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 04:54:49,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 04:54:48" (1/3) ... [2023-04-01 04:54:49,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@765545cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:54:49, skipping insertion in model container [2023-04-01 04:54:49,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 04:54:49" (2/3) ... [2023-04-01 04:54:49,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@765545cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 04:54:49, skipping insertion in model container [2023-04-01 04:54:49,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 04:54:49" (3/3) ... [2023-04-01 04:54:49,714 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2n_remove_all.i [2023-04-01 04:54:49,727 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 04:54:49,727 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 04:54:49,768 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 04:54:49,773 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;@49914356, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 04:54:49,773 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 04:54:49,776 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 04:54:49,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-04-01 04:54:49,781 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:54:49,781 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:54:49,782 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:54:49,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:54:49,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1032397593, now seen corresponding path program 1 times [2023-04-01 04:54:49,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:54:49,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155458614] [2023-04-01 04:54:49,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:54:49,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:54:49,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:54:50,083 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 04:54:50,084 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:54:50,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155458614] [2023-04-01 04:54:50,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155458614] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:54:50,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 04:54:50,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 04:54:50,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180659476] [2023-04-01 04:54:50,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:54:50,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 04:54:50,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:54:50,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 04:54:50,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 04:54:50,129 INFO L87 Difference]: Start difference. First operand has 27 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 5 states have internal predecessors, (8), 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 04:54:50,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:54:50,217 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2023-04-01 04:54:50,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 04:54:50,219 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 5 states have internal predecessors, (8), 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 13 [2023-04-01 04:54:50,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:54:50,223 INFO L225 Difference]: With dead ends: 45 [2023-04-01 04:54:50,223 INFO L226 Difference]: Without dead ends: 23 [2023-04-01 04:54:50,225 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 04:54:50,227 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 12 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-04-01 04:54:50,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 74 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-04-01 04:54:50,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-04-01 04:54:50,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2023-04-01 04:54:50,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 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 04:54:50,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2023-04-01 04:54:50,250 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 13 [2023-04-01 04:54:50,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:54:50,250 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2023-04-01 04:54:50,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 5 states have internal predecessors, (8), 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 04:54:50,251 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2023-04-01 04:54:50,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-04-01 04:54:50,251 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:54:50,251 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:54:50,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 04:54:50,252 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:54:50,252 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:54:50,252 INFO L85 PathProgramCache]: Analyzing trace with hash -711141340, now seen corresponding path program 1 times [2023-04-01 04:54:50,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:54:50,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348897491] [2023-04-01 04:54:50,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:54:50,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:54:50,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:54:50,388 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 04:54:50,388 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:54:50,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348897491] [2023-04-01 04:54:50,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348897491] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:54:50,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917156985] [2023-04-01 04:54:50,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:54:50,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:54:50,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:54:50,401 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 04:54:50,446 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 04:54:50,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:54:50,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 04:54:50,606 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:54:50,702 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 04:54:50,702 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:54:50,801 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 04:54:50,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917156985] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:54:50,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1017303188] [2023-04-01 04:54:50,822 INFO L159 IcfgInterpreter]: Started Sifa with 16 locations of interest [2023-04-01 04:54:50,822 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:54:50,825 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:54:50,828 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:54:50,829 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:54:50,884 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:54:51,154 INFO L197 IcfgInterpreter]: Interpreting procedure dll_create with input of size 44 for LOIs [2023-04-01 04:54:51,405 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:54:51,409 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:54:51,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1017303188] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 04:54:51,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:54:51,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [6, 6, 6] total 24 [2023-04-01 04:54:51,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958756928] [2023-04-01 04:54:51,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 04:54:51,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-04-01 04:54:51,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:54:51,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-04-01 04:54:51,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2023-04-01 04:54:51,970 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 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 04:54:53,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:54:53,066 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2023-04-01 04:54:53,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-04-01 04:54:53,069 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 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) Word has length 16 [2023-04-01 04:54:53,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:54:53,071 INFO L225 Difference]: With dead ends: 27 [2023-04-01 04:54:53,071 INFO L226 Difference]: Without dead ends: 24 [2023-04-01 04:54:53,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=190, Invalid=1070, Unknown=0, NotChecked=0, Total=1260 [2023-04-01 04:54:53,073 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 33 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:54:53,073 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 8 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 04:54:53,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-04-01 04:54:53,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2023-04-01 04:54:53,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 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 04:54:53,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2023-04-01 04:54:53,083 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 16 [2023-04-01 04:54:53,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:54:53,083 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2023-04-01 04:54:53,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 8 states have internal predecessors, (11), 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 04:54:53,083 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2023-04-01 04:54:53,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-04-01 04:54:53,084 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:54:53,084 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:54:53,105 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 04:54:53,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:54:53,291 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:54:53,292 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:54:53,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1770617266, now seen corresponding path program 1 times [2023-04-01 04:54:53,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:54:53,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603671304] [2023-04-01 04:54:53,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:54:53,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:54:53,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:54:53,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 04:54:53,411 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:54:53,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603671304] [2023-04-01 04:54:53,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603671304] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:54:53,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826612801] [2023-04-01 04:54:53,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:54:53,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:54:53,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:54:53,454 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 04:54:53,492 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 04:54:53,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:54:53,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 5 conjunts are in the unsatisfiable core [2023-04-01 04:54:53,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:54:53,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 04:54:53,623 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:54:53,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 04:54:53,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [826612801] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:54:53,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [105141329] [2023-04-01 04:54:53,695 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-01 04:54:53,695 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:54:53,695 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:54:53,695 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:54:53,695 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:54:53,708 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:54:53,990 INFO L197 IcfgInterpreter]: Interpreting procedure dll_remove_first with input of size 31 for LOIs [2023-04-01 04:54:54,001 INFO L197 IcfgInterpreter]: Interpreting procedure dll_create with input of size 44 for LOIs [2023-04-01 04:54:54,114 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:54:54,116 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:54:57,515 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '489#(and (= main_~data~0 1) (<= 1 |#StackHeapBarrier|) (= |main_~#s~0.offset| 0) (< main_~i~0 0) (= main_~len~0 2) (or (not (= (select (select |#memory_$Pointer$.base| |main_~#s~0.base|) 0) 0)) (not (= (select (select |#memory_$Pointer$.offset| |main_~#s~0.base|) 0) 0))) (= |#NULL.offset| 0) (<= (+ |#StackHeapBarrier| 1) |main_~#s~0.base|) (= |#NULL.base| 0))' at error location [2023-04-01 04:54:57,515 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:54:57,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:54:57,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-04-01 04:54:57,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743926096] [2023-04-01 04:54:57,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:54:57,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-04-01 04:54:57,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:54:57,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-04-01 04:54:57,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2023-04-01 04:54:57,517 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 12 states, 8 states have (on average 3.25) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2023-04-01 04:54:57,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:54:57,941 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2023-04-01 04:54:57,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-04-01 04:54:57,941 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 3.25) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) Word has length 21 [2023-04-01 04:54:57,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:54:57,942 INFO L225 Difference]: With dead ends: 38 [2023-04-01 04:54:57,942 INFO L226 Difference]: Without dead ends: 27 [2023-04-01 04:54:57,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2023-04-01 04:54:57,943 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 04:54:57,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 64 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 04:54:57,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-04-01 04:54:57,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2023-04-01 04:54:57,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 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 04:54:57,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2023-04-01 04:54:57,948 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 21 [2023-04-01 04:54:57,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:54:57,948 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2023-04-01 04:54:57,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 3.25) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2023-04-01 04:54:57,962 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2023-04-01 04:54:57,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-04-01 04:54:57,963 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:54:57,963 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:54:57,985 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 04:54:58,164 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,SelfDestructingSolverStorable2 [2023-04-01 04:54:58,164 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:54:58,164 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:54:58,165 INFO L85 PathProgramCache]: Analyzing trace with hash 754319449, now seen corresponding path program 2 times [2023-04-01 04:54:58,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:54:58,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932167571] [2023-04-01 04:54:58,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:54:58,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:54:58,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:54:58,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 04:54:58,403 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:54:58,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932167571] [2023-04-01 04:54:58,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932167571] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:54:58,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695397172] [2023-04-01 04:54:58,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-04-01 04:54:58,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:54:58,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:54:58,405 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 04:54:58,407 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 04:54:58,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-04-01 04:54:58,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 04:54:58,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 4 conjunts are in the unsatisfiable core [2023-04-01 04:54:58,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:54:58,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 04:54:58,656 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:54:58,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-04-01 04:54:58,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695397172] provided 0 perfect and 2 imperfect interpolant sequences [2023-04-01 04:54:58,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [313243585] [2023-04-01 04:54:58,769 INFO L159 IcfgInterpreter]: Started Sifa with 20 locations of interest [2023-04-01 04:54:58,770 INFO L166 IcfgInterpreter]: Building call graph [2023-04-01 04:54:58,770 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-04-01 04:54:58,770 INFO L176 IcfgInterpreter]: Starting interpretation [2023-04-01 04:54:58,770 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-04-01 04:54:58,798 INFO L197 IcfgInterpreter]: Interpreting procedure main with input of size 24 for LOIs [2023-04-01 04:54:59,173 INFO L197 IcfgInterpreter]: Interpreting procedure dll_remove_first with input of size 31 for LOIs [2023-04-01 04:54:59,193 INFO L197 IcfgInterpreter]: Interpreting procedure dll_create with input of size 44 for LOIs [2023-04-01 04:54:59,345 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 7 for LOIs [2023-04-01 04:54:59,351 INFO L180 IcfgInterpreter]: Interpretation finished [2023-04-01 04:55:04,178 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '754#(and (= main_~data~0 1) (<= 1 |#StackHeapBarrier|) (= |main_~#s~0.offset| 0) (< main_~i~0 0) (= main_~len~0 2) (or (not (= (select (select |#memory_$Pointer$.base| |main_~#s~0.base|) 0) 0)) (not (= (select (select |#memory_$Pointer$.offset| |main_~#s~0.base|) 0) 0))) (= |#NULL.offset| 0) (<= (+ |#StackHeapBarrier| 1) |main_~#s~0.base|) (= |#NULL.base| 0))' at error location [2023-04-01 04:55:04,178 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-04-01 04:55:04,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-04-01 04:55:04,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2023-04-01 04:55:04,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805706648] [2023-04-01 04:55:04,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-04-01 04:55:04,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-04-01 04:55:04,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 04:55:04,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-04-01 04:55:04,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2023-04-01 04:55:04,180 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 04:55:04,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 04:55:04,489 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2023-04-01 04:55:04,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 04:55:04,491 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 24 [2023-04-01 04:55:04,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 04:55:04,495 INFO L225 Difference]: With dead ends: 31 [2023-04-01 04:55:04,495 INFO L226 Difference]: Without dead ends: 28 [2023-04-01 04:55:04,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2023-04-01 04:55:04,498 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 10 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-04-01 04:55:04,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 38 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-04-01 04:55:04,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-04-01 04:55:04,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-04-01 04:55:04,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-04-01 04:55:04,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2023-04-01 04:55:04,512 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 24 [2023-04-01 04:55:04,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 04:55:04,513 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2023-04-01 04:55:04,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-04-01 04:55:04,513 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2023-04-01 04:55:04,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-04-01 04:55:04,514 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 04:55:04,514 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 04:55:04,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-04-01 04:55:04,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:55:04,722 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 04:55:04,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 04:55:04,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1962461383, now seen corresponding path program 3 times [2023-04-01 04:55:04,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 04:55:04,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405411227] [2023-04-01 04:55:04,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 04:55:04,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 04:55:04,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 04:55:09,101 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-04-01 04:55:09,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 04:55:09,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405411227] [2023-04-01 04:55:09,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405411227] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 04:55:09,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34115992] [2023-04-01 04:55:09,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-04-01 04:55:09,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 04:55:09,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 04:55:09,103 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 04:55:09,105 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 04:55:09,927 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-04-01 04:55:09,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-04-01 04:55:09,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 137 conjunts are in the unsatisfiable core [2023-04-01 04:55:09,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 04:55:10,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-04-01 04:55:10,917 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-04-01 04:55:10,944 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 15 [2023-04-01 04:55:11,322 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-04-01 04:55:11,322 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 1 case distinctions, treesize of input 11 treesize of output 11 [2023-04-01 04:55:11,721 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 04:55:11,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:55:11,739 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 37 treesize of output 26 [2023-04-01 04:55:11,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:55:11,756 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 51 treesize of output 34 [2023-04-01 04:55:11,767 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 11 treesize of output 15 [2023-04-01 04:55:11,813 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 23 treesize of output 29 [2023-04-01 04:55:11,852 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 23 treesize of output 29 [2023-04-01 04:55:13,592 WARN L861 $PredicateComparison]: unable to prove that (let ((.cse7 (select |c_old(#memory_$Pointer$.offset)| |c_dll_remove_first_#in~head.base|)) (.cse8 (select |c_old(#memory_$Pointer$.base)| |c_dll_remove_first_#in~head.base|))) (let ((.cse9 (select .cse8 |c_dll_remove_first_#in~head.offset|)) (.cse10 (+ (select .cse7 |c_dll_remove_first_#in~head.offset|) 4))) (let ((.cse1 (select (select |c_old(#memory_$Pointer$.offset)| .cse9) .cse10)) (.cse2 (select (select |c_old(#memory_$Pointer$.base)| .cse9) .cse10))) (let ((.cse5 (= .cse2 0)) (.cse4 (= .cse1 0))) (or (let ((.cse3 (+ 8 .cse1))) (and (exists ((v_ArrVal_586 Int)) (= (let ((.cse0 (store |c_old(#memory_$Pointer$.offset)| .cse2 (store (select |c_old(#memory_$Pointer$.offset)| .cse2) .cse3 v_ArrVal_586)))) (store .cse0 |c_dll_remove_first_#in~head.base| (store (select .cse0 |c_dll_remove_first_#in~head.base|) |c_dll_remove_first_#in~head.offset| .cse1))) |c_#memory_$Pointer$.offset|)) (or (not .cse4) (not .cse5)) (exists ((v_ArrVal_587 Int)) (= |c_#memory_$Pointer$.base| (let ((.cse6 (store |c_old(#memory_$Pointer$.base)| .cse2 (store (select |c_old(#memory_$Pointer$.base)| .cse2) .cse3 v_ArrVal_587)))) (store .cse6 |c_dll_remove_first_#in~head.base| (store (select .cse6 |c_dll_remove_first_#in~head.base|) |c_dll_remove_first_#in~head.offset| .cse2))))))) (and .cse5 .cse4 (= (store |c_old(#memory_$Pointer$.offset)| |c_dll_remove_first_#in~head.base| (store .cse7 |c_dll_remove_first_#in~head.offset| 0)) |c_#memory_$Pointer$.offset|) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_dll_remove_first_#in~head.base| (store .cse8 |c_dll_remove_first_#in~head.offset| 0))))))))) is different from true [2023-04-01 04:55:13,641 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-01 04:55:13,641 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 219 treesize of output 102 [2023-04-01 04:55:13,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:55:13,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:55:13,674 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:55:13,674 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 2 case distinctions, treesize of input 87 treesize of output 59 [2023-04-01 04:55:14,261 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-04-01 04:55:14,282 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2023-04-01 04:55:14,624 INFO L321 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2023-04-01 04:55:14,624 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 54 [2023-04-01 04:55:14,659 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:55:14,661 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:55:14,661 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 13 [2023-04-01 04:55:14,962 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-04-01 04:55:14,962 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-04-01 04:55:23,196 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:55:23,197 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 1074 treesize of output 930 [2023-04-01 04:55:23,238 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:55:23,239 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 1154 treesize of output 769 [2023-04-01 04:55:24,164 INFO L321 Elim1Store]: treesize reduction 312, result has 11.6 percent of original size [2023-04-01 04:55:24,166 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 1 disjoint index pairs (out of 36 index pairs), introduced 13 new quantified variables, introduced 36 case distinctions, treesize of input 298186 treesize of output 283690 [2023-04-01 04:55:31,368 WARN L223 SmtUtils]: Spent 7.20s on a formula simplification. DAG size of input: 821 DAG size of output: 542 (called from [L 809] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-04-01 04:55:32,117 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:55:32,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 50240 treesize of output 37000 [2023-04-01 04:55:32,415 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 04:55:32,725 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 04:55:32,872 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 04:55:32,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-04-01 04:55:33,118 INFO L321 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2023-04-01 04:55:33,119 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 106690 treesize of output 95488 [2023-04-01 04:55:36,189 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 19860 treesize of output 19844 [2023-04-01 04:55:37,013 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-04-01 04:55:37,013 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 19963 treesize of output 18165 [2023-04-01 04:55:38,367 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-04-01 04:55:38,367 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 116 [2023-04-01 04:55:38,842 INFO L321 Elim1Store]: treesize reduction 8, result has 33.3 percent of original size [2023-04-01 04:55:38,842 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 62 treesize of output 55 [2023-04-01 04:55:39,720 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2023-04-01 04:55:39,800 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 5 [2023-04-01 04:55:39,850 INFO L321 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2023-04-01 04:55:39,851 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 47 treesize of output 43 [2023-04-01 04:55:59,196 WARN L223 SmtUtils]: Spent 8.14s on a formula simplification that was a NOOP. DAG size: 78 (called from [L 376] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)