/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -tc ../../../trunk/examples/toolchains/AutomizerC.xml --sifa.abstract.domain EqDomain -i ../sv-benchmarks/c/list-simple/dll2c_prepend_unequal.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-f954360 [2023-04-01 10:57:06,112 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-04-01 10:57:06,115 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-04-01 10:57:06,153 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-04-01 10:57:06,154 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-04-01 10:57:06,156 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-04-01 10:57:06,160 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-04-01 10:57:06,161 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-04-01 10:57:06,162 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-04-01 10:57:06,163 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-04-01 10:57:06,164 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-04-01 10:57:06,169 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-04-01 10:57:06,169 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-04-01 10:57:06,170 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-04-01 10:57:06,171 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-04-01 10:57:06,172 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-04-01 10:57:06,172 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-04-01 10:57:06,173 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-04-01 10:57:06,174 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-04-01 10:57:06,176 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-04-01 10:57:06,177 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-04-01 10:57:06,182 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-04-01 10:57:06,182 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-04-01 10:57:06,183 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-04-01 10:57:06,186 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-04-01 10:57:06,186 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-04-01 10:57:06,186 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-04-01 10:57:06,187 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-04-01 10:57:06,187 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-04-01 10:57:06,188 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-04-01 10:57:06,188 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-04-01 10:57:06,189 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-04-01 10:57:06,189 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-04-01 10:57:06,190 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-04-01 10:57:06,191 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-04-01 10:57:06,191 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-04-01 10:57:06,192 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-04-01 10:57:06,192 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-04-01 10:57:06,192 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-04-01 10:57:06,193 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-04-01 10:57:06,193 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-04-01 10:57:06,199 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 10:57:06,219 INFO L113 SettingsManager]: Loading preferences was successful [2023-04-01 10:57:06,219 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-04-01 10:57:06,219 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-04-01 10:57:06,220 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-04-01 10:57:06,222 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-04-01 10:57:06,222 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-04-01 10:57:06,222 INFO L138 SettingsManager]: * User list type=DISABLED [2023-04-01 10:57:06,222 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-04-01 10:57:06,222 INFO L138 SettingsManager]: * Explicit value domain=true [2023-04-01 10:57:06,223 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-04-01 10:57:06,223 INFO L138 SettingsManager]: * Octagon Domain=false [2023-04-01 10:57:06,223 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2023-04-01 10:57:06,223 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-04-01 10:57:06,223 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-04-01 10:57:06,223 INFO L138 SettingsManager]: * Interval Domain=false [2023-04-01 10:57:06,223 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-04-01 10:57:06,223 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-04-01 10:57:06,224 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2023-04-01 10:57:06,224 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-04-01 10:57:06,224 INFO L138 SettingsManager]: * sizeof long=4 [2023-04-01 10:57:06,225 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-04-01 10:57:06,225 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-04-01 10:57:06,225 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-04-01 10:57:06,225 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-04-01 10:57:06,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-04-01 10:57:06,225 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-04-01 10:57:06,225 INFO L138 SettingsManager]: * sizeof long double=12 [2023-04-01 10:57:06,225 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-04-01 10:57:06,226 INFO L138 SettingsManager]: * Use constant arrays=true [2023-04-01 10:57:06,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-04-01 10:57:06,226 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-04-01 10:57:06,226 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-04-01 10:57:06,226 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:57:06,226 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-04-01 10:57:06,227 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2023-04-01 10:57:06,227 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-04-01 10:57:06,227 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-04-01 10:57:06,228 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-04-01 10:57:06,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-04-01 10:57:06,228 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-04-01 10:57:06,228 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-04-01 10:57:06,228 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> EqDomain [2023-04-01 10:57:06,453 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-04-01 10:57:06,476 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-04-01 10:57:06,479 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-04-01 10:57:06,480 INFO L271 PluginConnector]: Initializing CDTParser... [2023-04-01 10:57:06,481 INFO L275 PluginConnector]: CDTParser initialized [2023-04-01 10:57:06,482 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/dll2c_prepend_unequal.i [2023-04-01 10:57:07,746 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-04-01 10:57:08,042 INFO L351 CDTParser]: Found 1 translation units. [2023-04-01 10:57:08,045 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/dll2c_prepend_unequal.i [2023-04-01 10:57:08,059 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/670df6b98/bcbdb01ba9a54989b2900a5301f84279/FLAGe7997c4c8 [2023-04-01 10:57:08,072 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/670df6b98/bcbdb01ba9a54989b2900a5301f84279 [2023-04-01 10:57:08,075 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-04-01 10:57:08,076 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2023-04-01 10:57:08,077 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-04-01 10:57:08,077 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-04-01 10:57:08,082 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-04-01 10:57:08,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:57:08" (1/1) ... [2023-04-01 10:57:08,083 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1312300b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:57:08, skipping insertion in model container [2023-04-01 10:57:08,083 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.04 10:57:08" (1/1) ... [2023-04-01 10:57:08,090 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-04-01 10:57:08,132 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-04-01 10:57:08,357 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/dll2c_prepend_unequal.i[24729,24742] [2023-04-01 10:57:08,365 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:57:08,377 INFO L203 MainTranslator]: Completed pre-run [2023-04-01 10:57:08,436 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/dll2c_prepend_unequal.i[24729,24742] [2023-04-01 10:57:08,437 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-04-01 10:57:08,462 INFO L208 MainTranslator]: Completed translation [2023-04-01 10:57:08,462 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:57:08 WrapperNode [2023-04-01 10:57:08,462 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-04-01 10:57:08,463 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-04-01 10:57:08,463 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-04-01 10:57:08,464 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-04-01 10:57:08,473 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:57:08" (1/1) ... [2023-04-01 10:57:08,474 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:57:08" (1/1) ... [2023-04-01 10:57:08,488 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:57:08" (1/1) ... [2023-04-01 10:57:08,489 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:57:08" (1/1) ... [2023-04-01 10:57:08,504 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:57:08" (1/1) ... [2023-04-01 10:57:08,508 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:57:08" (1/1) ... [2023-04-01 10:57:08,511 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:57:08" (1/1) ... [2023-04-01 10:57:08,513 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:57:08" (1/1) ... [2023-04-01 10:57:08,524 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-04-01 10:57:08,525 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-04-01 10:57:08,525 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-04-01 10:57:08,525 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-04-01 10:57:08,526 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:57:08" (1/1) ... [2023-04-01 10:57:08,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-04-01 10:57:08,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:57:08,571 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 10:57:08,585 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 10:57:08,629 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2023-04-01 10:57:08,630 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-04-01 10:57:08,630 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2023-04-01 10:57:08,630 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2023-04-01 10:57:08,632 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2023-04-01 10:57:08,632 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2023-04-01 10:57:08,632 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2023-04-01 10:57:08,632 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_create [2023-04-01 10:57:08,632 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_destroy [2023-04-01 10:57:08,633 INFO L138 BoogieDeclarations]: Found implementation of procedure dll_circular_prepend [2023-04-01 10:57:08,633 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2023-04-01 10:57:08,633 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2023-04-01 10:57:08,633 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2023-04-01 10:57:08,633 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2023-04-01 10:57:08,633 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2023-04-01 10:57:08,633 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2023-04-01 10:57:08,633 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-04-01 10:57:08,634 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2023-04-01 10:57:08,634 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2023-04-01 10:57:08,634 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2023-04-01 10:57:08,634 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2023-04-01 10:57:08,634 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2023-04-01 10:57:08,634 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2023-04-01 10:57:08,634 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2023-04-01 10:57:08,634 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2023-04-01 10:57:08,635 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2023-04-01 10:57:08,635 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2023-04-01 10:57:08,636 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2023-04-01 10:57:08,636 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2023-04-01 10:57:08,636 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2023-04-01 10:57:08,636 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2023-04-01 10:57:08,636 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2023-04-01 10:57:08,636 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2023-04-01 10:57:08,636 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2023-04-01 10:57:08,637 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2023-04-01 10:57:08,637 INFO L130 BoogieDeclarations]: Found specification of procedure select [2023-04-01 10:57:08,637 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2023-04-01 10:57:08,637 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2023-04-01 10:57:08,637 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2023-04-01 10:57:08,637 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2023-04-01 10:57:08,637 INFO L130 BoogieDeclarations]: Found specification of procedure random [2023-04-01 10:57:08,637 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2023-04-01 10:57:08,638 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2023-04-01 10:57:08,638 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2023-04-01 10:57:08,639 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2023-04-01 10:57:08,639 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2023-04-01 10:57:08,639 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2023-04-01 10:57:08,640 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2023-04-01 10:57:08,640 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2023-04-01 10:57:08,640 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2023-04-01 10:57:08,640 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2023-04-01 10:57:08,640 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2023-04-01 10:57:08,640 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2023-04-01 10:57:08,641 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2023-04-01 10:57:08,641 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2023-04-01 10:57:08,641 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2023-04-01 10:57:08,642 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2023-04-01 10:57:08,642 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2023-04-01 10:57:08,642 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2023-04-01 10:57:08,643 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2023-04-01 10:57:08,643 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2023-04-01 10:57:08,643 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2023-04-01 10:57:08,643 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2023-04-01 10:57:08,643 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2023-04-01 10:57:08,643 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2023-04-01 10:57:08,644 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2023-04-01 10:57:08,644 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2023-04-01 10:57:08,644 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2023-04-01 10:57:08,644 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2023-04-01 10:57:08,644 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2023-04-01 10:57:08,644 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2023-04-01 10:57:08,644 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2023-04-01 10:57:08,644 INFO L130 BoogieDeclarations]: Found specification of procedure free [2023-04-01 10:57:08,644 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2023-04-01 10:57:08,645 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2023-04-01 10:57:08,645 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2023-04-01 10:57:08,645 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2023-04-01 10:57:08,645 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2023-04-01 10:57:08,645 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2023-04-01 10:57:08,646 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2023-04-01 10:57:08,646 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2023-04-01 10:57:08,646 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2023-04-01 10:57:08,646 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2023-04-01 10:57:08,647 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2023-04-01 10:57:08,647 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2023-04-01 10:57:08,647 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2023-04-01 10:57:08,647 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2023-04-01 10:57:08,647 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2023-04-01 10:57:08,647 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2023-04-01 10:57:08,647 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2023-04-01 10:57:08,647 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2023-04-01 10:57:08,648 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2023-04-01 10:57:08,648 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2023-04-01 10:57:08,648 INFO L130 BoogieDeclarations]: Found specification of procedure system [2023-04-01 10:57:08,648 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2023-04-01 10:57:08,648 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2023-04-01 10:57:08,648 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2023-04-01 10:57:08,648 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2023-04-01 10:57:08,648 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2023-04-01 10:57:08,648 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2023-04-01 10:57:08,649 INFO L130 BoogieDeclarations]: Found specification of procedure div [2023-04-01 10:57:08,649 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2023-04-01 10:57:08,649 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2023-04-01 10:57:08,649 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2023-04-01 10:57:08,649 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2023-04-01 10:57:08,649 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2023-04-01 10:57:08,650 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2023-04-01 10:57:08,650 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2023-04-01 10:57:08,650 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2023-04-01 10:57:08,650 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2023-04-01 10:57:08,650 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2023-04-01 10:57:08,650 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2023-04-01 10:57:08,650 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2023-04-01 10:57:08,650 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2023-04-01 10:57:08,650 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2023-04-01 10:57:08,651 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2023-04-01 10:57:08,651 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2023-04-01 10:57:08,651 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2023-04-01 10:57:08,652 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2023-04-01 10:57:08,652 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2023-04-01 10:57:08,652 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2023-04-01 10:57:08,653 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2023-04-01 10:57:08,655 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2023-04-01 10:57:08,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-04-01 10:57:08,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-04-01 10:57:08,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-04-01 10:57:08,662 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_create [2023-04-01 10:57:08,662 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_destroy [2023-04-01 10:57:08,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-04-01 10:57:08,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-04-01 10:57:08,662 INFO L130 BoogieDeclarations]: Found specification of procedure dll_circular_prepend [2023-04-01 10:57:08,663 INFO L130 BoogieDeclarations]: Found specification of procedure main [2023-04-01 10:57:08,663 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-04-01 10:57:08,663 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-04-01 10:57:08,663 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-04-01 10:57:08,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2023-04-01 10:57:08,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-04-01 10:57:08,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-04-01 10:57:08,941 INFO L236 CfgBuilder]: Building ICFG [2023-04-01 10:57:08,943 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-04-01 10:57:09,046 INFO L771 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2023-04-01 10:57:09,270 INFO L277 CfgBuilder]: Performing block encoding [2023-04-01 10:57:09,344 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-04-01 10:57:09,344 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-04-01 10:57:09,347 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:57:09 BoogieIcfgContainer [2023-04-01 10:57:09,347 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-04-01 10:57:09,349 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-04-01 10:57:09,349 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-04-01 10:57:09,352 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-04-01 10:57:09,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.04 10:57:08" (1/3) ... [2023-04-01 10:57:09,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a3a079 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:57:09, skipping insertion in model container [2023-04-01 10:57:09,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.04 10:57:08" (2/3) ... [2023-04-01 10:57:09,353 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34a3a079 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.04 10:57:09, skipping insertion in model container [2023-04-01 10:57:09,353 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.04 10:57:09" (3/3) ... [2023-04-01 10:57:09,354 INFO L112 eAbstractionObserver]: Analyzing ICFG dll2c_prepend_unequal.i [2023-04-01 10:57:09,371 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-04-01 10:57:09,371 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-04-01 10:57:09,412 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-04-01 10:57:09,418 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;@790a1b6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-04-01 10:57:09,418 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-04-01 10:57:09,422 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 29 states have internal predecessors, (38), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2023-04-01 10:57:09,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-04-01 10:57:09,431 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:57:09,431 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:57:09,432 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:57:09,438 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:57:09,438 INFO L85 PathProgramCache]: Analyzing trace with hash 231098832, now seen corresponding path program 1 times [2023-04-01 10:57:09,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:57:09,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463957650] [2023-04-01 10:57:09,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:57:09,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:57:09,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:57:10,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-04-01 10:57:10,074 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:57:10,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463957650] [2023-04-01 10:57:10,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463957650] provided 1 perfect and 0 imperfect interpolant sequences [2023-04-01 10:57:10,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-04-01 10:57:10,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-04-01 10:57:10,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829076450] [2023-04-01 10:57:10,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-04-01 10:57:10,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-04-01 10:57:10,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-04-01 10:57:10,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-04-01 10:57:10,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-04-01 10:57:10,120 INFO L87 Difference]: Start difference. First operand has 45 states, 28 states have (on average 1.3571428571428572) internal successors, (38), 29 states have internal predecessors, (38), 9 states have call successors, (9), 7 states have call predecessors, (9), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 5 states, 3 states have (on average 4.666666666666667) internal successors, (14), 5 states have internal predecessors, (14), 4 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-04-01 10:57:10,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-04-01 10:57:10,441 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2023-04-01 10:57:10,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-04-01 10:57:10,443 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 4.666666666666667) internal successors, (14), 5 states have internal predecessors, (14), 4 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 28 [2023-04-01 10:57:10,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-04-01 10:57:10,449 INFO L225 Difference]: With dead ends: 81 [2023-04-01 10:57:10,449 INFO L226 Difference]: Without dead ends: 34 [2023-04-01 10:57:10,452 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 10:57:10,455 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 16 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-04-01 10:57:10,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 148 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-04-01 10:57:10,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-04-01 10:57:10,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2023-04-01 10:57:10,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-04-01 10:57:10,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2023-04-01 10:57:10,488 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 28 [2023-04-01 10:57:10,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-04-01 10:57:10,489 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2023-04-01 10:57:10,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 4.666666666666667) internal successors, (14), 5 states have internal predecessors, (14), 4 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2023-04-01 10:57:10,489 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2023-04-01 10:57:10,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-04-01 10:57:10,491 INFO L187 NwaCegarLoop]: Found error trace [2023-04-01 10:57:10,491 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-04-01 10:57:10,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-04-01 10:57:10,491 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-04-01 10:57:10,492 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-04-01 10:57:10,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1975020599, now seen corresponding path program 1 times [2023-04-01 10:57:10,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-04-01 10:57:10,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803625978] [2023-04-01 10:57:10,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:57:10,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-04-01 10:57:10,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:57:17,559 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-04-01 10:57:17,559 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-04-01 10:57:17,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803625978] [2023-04-01 10:57:17,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803625978] provided 0 perfect and 1 imperfect interpolant sequences [2023-04-01 10:57:17,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377512898] [2023-04-01 10:57:17,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-04-01 10:57:17,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-04-01 10:57:17,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-04-01 10:57:17,563 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 10:57:17,564 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 10:57:17,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-04-01 10:57:17,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 114 conjunts are in the unsatisfiable core [2023-04-01 10:57:17,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-04-01 10:57:17,980 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 10:57:18,063 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-04-01 10:57:18,168 INFO L321 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-04-01 10:57:18,169 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-04-01 10:57:18,307 INFO L321 Elim1Store]: treesize reduction 30, result has 38.8 percent of original size [2023-04-01 10:57:18,308 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 78 [2023-04-01 10:57:18,318 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 10 treesize of output 9 [2023-04-01 10:57:18,333 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 16 treesize of output 15 [2023-04-01 10:57:18,389 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 10:57:18,390 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 10:57:18,393 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 13 [2023-04-01 10:57:18,400 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 13 treesize of output 9 [2023-04-01 10:57:18,658 INFO L321 Elim1Store]: treesize reduction 17, result has 5.6 percent of original size [2023-04-01 10:57:18,659 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 63 treesize of output 26 [2023-04-01 10:57:18,668 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-04-01 10:57:18,668 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 7 [2023-04-01 10:57:18,798 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 13 treesize of output 9 [2023-04-01 10:57:19,178 INFO L321 Elim1Store]: treesize reduction 30, result has 23.1 percent of original size [2023-04-01 10:57:19,179 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 300 treesize of output 319 [2023-04-01 10:57:19,315 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2023-04-01 10:57:19,478 INFO L321 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2023-04-01 10:57:19,479 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 531 treesize of output 560 [2023-04-01 10:57:19,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 549 treesize of output 560 [2023-04-01 10:57:20,754 INFO L321 Elim1Store]: treesize reduction 453, result has 42.4 percent of original size [2023-04-01 10:57:20,755 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 5 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 786 treesize of output 1939 [2023-04-01 10:57:20,883 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 49 [2023-04-01 10:57:21,382 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 16 treesize of output 15 [2023-04-01 10:57:21,494 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 16 treesize of output 15 [2023-04-01 10:57:21,563 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 16 treesize of output 15 [2023-04-01 10:57:22,607 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 10:57:22,611 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 10:57:22,613 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 10:57:22,617 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 485 treesize of output 446 [2023-04-01 10:57:22,728 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 10:57:22,755 INFO L321 Elim1Store]: treesize reduction 145, result has 20.8 percent of original size [2023-04-01 10:57:22,756 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 519 treesize of output 518 [2023-04-01 10:57:23,100 INFO L321 Elim1Store]: treesize reduction 332, result has 20.4 percent of original size [2023-04-01 10:57:23,100 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 11 case distinctions, treesize of input 642 treesize of output 685 [2023-04-01 10:57:23,336 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 13 treesize of output 9 [2023-04-01 10:57:23,409 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 13 treesize of output 9 [2023-04-01 10:57:23,452 WARN L207 Elim1Store]: Array PQE input equivalent to false [2023-04-01 10:57:23,811 INFO L321 Elim1Store]: treesize reduction 332, result has 20.4 percent of original size [2023-04-01 10:57:23,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 11 case distinctions, treesize of input 642 treesize of output 685 [2023-04-01 10:57:23,971 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 13 treesize of output 9 [2023-04-01 10:57:36,515 INFO L173 IndexEqualityManager]: detected equality via solver [2023-04-01 10:57:36,517 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 245 treesize of output 59 [2023-04-01 10:57:38,114 INFO L321 Elim1Store]: treesize reduction 166, result has 33.9 percent of original size [2023-04-01 10:57:38,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 4049 treesize of output 3463 [2023-04-01 10:57:42,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 10:57:42,298 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 7 [2023-04-01 10:57:42,307 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2023-04-01 10:57:42,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2023-04-01 10:57:42,398 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 1 [2023-04-01 10:57:42,427 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-04-01 10:57:43,972 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 11 treesize of output 7 [2023-04-01 10:57:44,003 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 11 treesize of output 7 [2023-04-01 10:57:44,023 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 11 treesize of output 7 [2023-04-01 10:57:44,039 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2023-04-01 10:57:44,096 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 11 treesize of output 7 [2023-04-01 10:57:44,281 INFO L173 IndexEqualityManager]: detected equality via solver