/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 13:39:56,109 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 13:39:56,112 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 13:39:56,167 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 13:39:56,168 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 13:39:56,172 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 13:39:56,175 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 13:39:56,183 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 13:39:56,186 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 13:39:56,192 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 13:39:56,193 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 13:39:56,195 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 13:39:56,196 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 13:39:56,199 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 13:39:56,200 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 13:39:56,214 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 13:39:56,215 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 13:39:56,217 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 13:39:56,219 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 13:39:56,221 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 13:39:56,223 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 13:39:56,224 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 13:39:56,226 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 13:39:56,226 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 13:39:56,229 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-23 13:39:56,230 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-23 13:39:56,230 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-23 13:39:56,231 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-23 13:39:56,232 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-23 13:39:56,233 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-23 13:39:56,233 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-23 13:39:56,234 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-23 13:39:56,235 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-23 13:39:56,236 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-23 13:39:56,237 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-23 13:39:56,237 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-23 13:39:56,238 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-23 13:39:56,238 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-23 13:39:56,239 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 13:39:56,240 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 13:39:56,241 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 13:39:56,242 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-02-23 13:39:56,272 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 13:39:56,273 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 13:39:56,274 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-23 13:39:56,274 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-23 13:39:56,275 INFO L138 SettingsManager]: * Use SBE=true [2021-02-23 13:39:56,275 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 13:39:56,275 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 13:39:56,275 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 13:39:56,276 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 13:39:56,276 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 13:39:56,276 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 13:39:56,276 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 13:39:56,276 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 13:39:56,277 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 13:39:56,277 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 13:39:56,277 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 13:39:56,277 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 13:39:56,278 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 13:39:56,278 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-23 13:39:56,278 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 13:39:56,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 13:39:56,279 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 13:39:56,279 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-23 13:39:56,279 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-23 13:39:56,279 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-23 13:39:56,279 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-23 13:39:56,280 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 13:39:56,280 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-23 13:39:56,280 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 13:39:56,643 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 13:39:56,670 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 13:39:56,673 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 13:39:56,675 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 13:39:56,676 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 13:39:56,677 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2021-02-23 13:39:56,760 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c15141a96/160636e4b6074890985acc6e0d18d6a7/FLAGc1e205031 [2021-02-23 13:39:57,552 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 13:39:57,553 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2021-02-23 13:39:57,576 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c15141a96/160636e4b6074890985acc6e0d18d6a7/FLAGc1e205031 [2021-02-23 13:39:57,833 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c15141a96/160636e4b6074890985acc6e0d18d6a7 [2021-02-23 13:39:57,836 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 13:39:57,850 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 13:39:57,853 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 13:39:57,853 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 13:39:57,859 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 13:39:57,860 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 01:39:57" (1/1) ... [2021-02-23 13:39:57,862 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a115805 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:39:57, skipping insertion in model container [2021-02-23 13:39:57,862 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 01:39:57" (1/1) ... [2021-02-23 13:39:57,870 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 13:39:57,907 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 13:39:58,273 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-1.i[24032,24045] [2021-02-23 13:39:58,279 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 13:39:58,291 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 13:39:58,338 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-1.i[24032,24045] [2021-02-23 13:39:58,340 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 13:39:58,450 INFO L208 MainTranslator]: Completed translation [2021-02-23 13:39:58,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:39:58 WrapperNode [2021-02-23 13:39:58,454 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 13:39:58,456 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 13:39:58,461 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 13:39:58,461 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 13:39:58,508 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:39:58" (1/1) ... [2021-02-23 13:39:58,509 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:39:58" (1/1) ... [2021-02-23 13:39:58,557 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:39:58" (1/1) ... [2021-02-23 13:39:58,560 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:39:58" (1/1) ... [2021-02-23 13:39:58,612 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:39:58" (1/1) ... [2021-02-23 13:39:58,619 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:39:58" (1/1) ... [2021-02-23 13:39:58,624 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:39:58" (1/1) ... [2021-02-23 13:39:58,632 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 13:39:58,633 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 13:39:58,633 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 13:39:58,634 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 13:39:58,635 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:39:58" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 13:39:58,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 13:39:58,750 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 13:39:58,751 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 13:39:58,751 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-02-23 13:39:58,751 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-02-23 13:39:58,751 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die [2021-02-23 13:39:58,751 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sl_with_head_and_tail [2021-02-23 13:39:58,752 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_random_insert [2021-02-23 13:39:58,752 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_sl [2021-02-23 13:39:58,752 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-02-23 13:39:58,752 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 13:39:58,752 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 13:39:58,752 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 13:39:58,753 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-23 13:39:58,753 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-23 13:39:58,753 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 13:39:58,753 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 13:39:58,753 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-23 13:39:58,753 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-02-23 13:39:58,754 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-02-23 13:39:58,754 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-02-23 13:39:58,754 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-02-23 13:39:58,754 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-02-23 13:39:58,754 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-02-23 13:39:58,754 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-02-23 13:39:58,754 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-02-23 13:39:58,755 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-02-23 13:39:58,755 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-02-23 13:39:58,755 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-02-23 13:39:58,755 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-02-23 13:39:58,755 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-02-23 13:39:58,755 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-02-23 13:39:58,756 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-02-23 13:39:58,756 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-02-23 13:39:58,756 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-02-23 13:39:58,756 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-02-23 13:39:58,756 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-02-23 13:39:58,757 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-02-23 13:39:58,757 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-02-23 13:39:58,757 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-02-23 13:39:58,757 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-02-23 13:39:58,757 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-02-23 13:39:58,757 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-02-23 13:39:58,758 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-02-23 13:39:58,758 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-02-23 13:39:58,758 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-02-23 13:39:58,758 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-02-23 13:39:58,758 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-02-23 13:39:58,759 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-02-23 13:39:58,759 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-02-23 13:39:58,759 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-02-23 13:39:58,759 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-02-23 13:39:58,759 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-02-23 13:39:58,759 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-02-23 13:39:58,759 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-02-23 13:39:58,760 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-02-23 13:39:58,760 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-02-23 13:39:58,760 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-02-23 13:39:58,760 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-02-23 13:39:58,760 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-02-23 13:39:58,760 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-02-23 13:39:58,761 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-02-23 13:39:58,761 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-02-23 13:39:58,761 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-02-23 13:39:58,761 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-02-23 13:39:58,761 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-02-23 13:39:58,761 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-02-23 13:39:58,762 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-02-23 13:39:58,762 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-02-23 13:39:58,762 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-02-23 13:39:58,762 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-23 13:39:58,762 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-02-23 13:39:58,762 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-02-23 13:39:58,763 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-02-23 13:39:58,763 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-02-23 13:39:58,763 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-02-23 13:39:58,763 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-02-23 13:39:58,763 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-02-23 13:39:58,763 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-02-23 13:39:58,764 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-02-23 13:39:58,764 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-02-23 13:39:58,764 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-02-23 13:39:58,764 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-02-23 13:39:58,764 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-02-23 13:39:58,764 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-02-23 13:39:58,764 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-02-23 13:39:58,765 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-02-23 13:39:58,765 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-02-23 13:39:58,765 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-02-23 13:39:58,765 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-02-23 13:39:58,765 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-02-23 13:39:58,765 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-02-23 13:39:58,765 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-02-23 13:39:58,766 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-02-23 13:39:58,766 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-02-23 13:39:58,766 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-02-23 13:39:58,766 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-02-23 13:39:58,766 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-02-23 13:39:58,766 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-02-23 13:39:58,767 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-02-23 13:39:58,767 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-02-23 13:39:58,767 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-02-23 13:39:58,767 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-02-23 13:39:58,767 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-02-23 13:39:58,768 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-02-23 13:39:58,768 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-02-23 13:39:58,768 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-02-23 13:39:58,768 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-02-23 13:39:58,768 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-02-23 13:39:58,768 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-02-23 13:39:58,769 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-02-23 13:39:58,769 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-02-23 13:39:58,769 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-02-23 13:39:58,769 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-02-23 13:39:58,769 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-02-23 13:39:58,769 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-02-23 13:39:58,769 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-02-23 13:39:58,770 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-02-23 13:39:58,770 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-02-23 13:39:58,770 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-02-23 13:39:58,770 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-02-23 13:39:58,770 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-02-23 13:39:58,770 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die [2021-02-23 13:39:58,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-23 13:39:58,771 INFO L130 BoogieDeclarations]: Found specification of procedure create_sl_with_head_and_tail [2021-02-23 13:39:58,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-02-23 13:39:58,771 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-02-23 13:39:58,771 INFO L130 BoogieDeclarations]: Found specification of procedure sl_random_insert [2021-02-23 13:39:58,771 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_sl [2021-02-23 13:39:58,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 13:39:58,772 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-02-23 13:39:58,772 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 13:39:58,772 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 13:39:58,772 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 13:39:58,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 13:39:58,773 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 13:39:58,773 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 13:39:59,419 INFO L759 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-02-23 13:39:59,870 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 13:39:59,871 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-02-23 13:39:59,872 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 01:39:59 BoogieIcfgContainer [2021-02-23 13:39:59,873 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 13:39:59,875 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 13:39:59,875 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 13:39:59,878 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 13:39:59,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 01:39:57" (1/3) ... [2021-02-23 13:39:59,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e06da00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 01:39:59, skipping insertion in model container [2021-02-23 13:39:59,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 01:39:58" (2/3) ... [2021-02-23 13:39:59,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e06da00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 01:39:59, skipping insertion in model container [2021-02-23 13:39:59,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 01:39:59" (3/3) ... [2021-02-23 13:39:59,882 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_and_skiplist_2lvl-1.i [2021-02-23 13:39:59,889 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-23 13:39:59,895 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 13:39:59,914 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 13:39:59,942 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 13:39:59,943 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 13:39:59,943 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-23 13:39:59,943 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 13:39:59,943 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 13:39:59,943 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 13:39:59,943 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 13:39:59,943 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 13:39:59,962 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2021-02-23 13:39:59,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-02-23 13:39:59,968 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:39:59,969 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:39:59,970 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:39:59,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:39:59,976 INFO L82 PathProgramCache]: Analyzing trace with hash -140425679, now seen corresponding path program 1 times [2021-02-23 13:39:59,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:39:59,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527281832] [2021-02-23 13:39:59,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:40:00,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:40:00,179 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:00,180 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:40:00,182 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:00,182 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:40:00,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:40:00,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:40:00,254 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:00,255 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:40:00,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:40:00,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527281832] [2021-02-23 13:40:00,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:40:00,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-23 13:40:00,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987225456] [2021-02-23 13:40:00,266 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-23 13:40:00,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:40:00,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-23 13:40:00,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 13:40:00,285 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 3 states. [2021-02-23 13:40:00,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:40:00,582 INFO L93 Difference]: Finished difference Result 95 states and 129 transitions. [2021-02-23 13:40:00,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-23 13:40:00,584 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2021-02-23 13:40:00,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:40:00,596 INFO L225 Difference]: With dead ends: 95 [2021-02-23 13:40:00,596 INFO L226 Difference]: Without dead ends: 18 [2021-02-23 13:40:00,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-23 13:40:00,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-02-23 13:40:00,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-02-23 13:40:00,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2021-02-23 13:40:00,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-02-23 13:40:00,648 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2021-02-23 13:40:00,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:40:00,649 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-02-23 13:40:00,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-23 13:40:00,649 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-02-23 13:40:00,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-23 13:40:00,650 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:40:00,650 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:40:00,650 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 13:40:00,650 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:40:00,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:40:00,651 INFO L82 PathProgramCache]: Analyzing trace with hash -500866268, now seen corresponding path program 1 times [2021-02-23 13:40:00,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:40:00,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052796758] [2021-02-23 13:40:00,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:40:00,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:40:00,774 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:00,775 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:40:00,787 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:00,790 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:40:00,806 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:00,807 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:40:00,819 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:00,819 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:40:00,831 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:00,832 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:40:00,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:40:00,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:40:00,890 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:00,891 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:40:00,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:40:00,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052796758] [2021-02-23 13:40:00,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 13:40:00,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 13:40:00,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597268850] [2021-02-23 13:40:00,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 13:40:00,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:40:00,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 13:40:00,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-02-23 13:40:00,897 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 6 states. [2021-02-23 13:40:01,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:40:01,062 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2021-02-23 13:40:01,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 13:40:01,063 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2021-02-23 13:40:01,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:40:01,064 INFO L225 Difference]: With dead ends: 33 [2021-02-23 13:40:01,064 INFO L226 Difference]: Without dead ends: 31 [2021-02-23 13:40:01,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-02-23 13:40:01,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-02-23 13:40:01,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 23. [2021-02-23 13:40:01,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2021-02-23 13:40:01,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-02-23 13:40:01,073 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 14 [2021-02-23 13:40:01,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:40:01,073 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-02-23 13:40:01,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 13:40:01,073 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-02-23 13:40:01,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-23 13:40:01,074 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:40:01,074 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:40:01,075 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 13:40:01,075 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:40:01,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:40:01,076 INFO L82 PathProgramCache]: Analyzing trace with hash -585734747, now seen corresponding path program 1 times [2021-02-23 13:40:01,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:40:01,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656928355] [2021-02-23 13:40:01,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:40:01,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:40:01,165 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,168 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:40:01,169 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,170 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:40:01,178 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,179 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 13:40:01,202 WARN L141 QuantifierPusher]: treesize reduction 10, result has 68.8 percent of original size [2021-02-23 13:40:01,205 WARN L147 QuantifierPusher]: treesize reduction 10, result has 68.8 percent of original size 22 [2021-02-23 13:40:01,226 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,228 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:40:01,244 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,245 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:40:01,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 13:40:01,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:40:01,298 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,299 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:40:01,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:40:01,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656928355] [2021-02-23 13:40:01,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049898759] [2021-02-23 13:40:01,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-23 13:40:01,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 13:40:01,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 21 conjunts are in the unsatisfiable core [2021-02-23 13:40:01,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-23 13:40:01,603 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,604 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:40:01,607 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,608 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:40:01,608 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,609 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:40:01,610 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,611 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:40:01,612 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,613 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:40:01,613 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,614 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:40:01,614 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,616 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:40:01,617 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,618 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:40:01,619 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,619 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:40:01,620 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,621 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:40:01,621 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,622 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:40:01,623 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,623 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:40:01,624 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,625 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:40:01,625 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,626 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:40:01,626 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,627 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:40:01,628 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,629 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:40:01,630 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,631 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:40:01,631 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,632 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:40:01,633 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,634 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:40:01,635 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,637 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:40:01,638 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,639 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 13:40:01,643 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,652 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 13:40:01,653 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,653 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:40:01,654 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,674 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:40:01,675 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,676 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:40:01,677 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,678 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:40:01,678 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,679 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:40:01,680 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,681 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:40:01,682 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,683 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 13:40:01,684 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,685 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 13:40:01,686 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,687 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 13:40:01,688 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,690 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 13:40:01,698 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,699 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 13:40:01,701 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,702 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 13:40:01,703 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,704 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 13:40:01,705 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,707 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 13:40:01,708 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,709 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 13:40:01,710 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,711 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 13:40:01,713 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,714 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 13:40:01,715 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,716 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 13:40:01,718 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 13:40:01,721 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,722 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 13:40:01,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 13:40:01,724 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,724 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 13:40:01,726 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 43 [2021-02-23 13:40:01,728 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 13:40:01,731 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,732 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 13:40:01,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 13:40:01,733 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,734 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 13:40:01,736 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-02-23 13:40:01,737 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 13:40:01,746 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,747 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 13:40:01,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 13:40:01,749 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,749 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-02-23 13:40:01,751 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 28 [2021-02-23 13:40:01,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-23 13:40:01,794 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,795 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:40:01,796 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,796 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:40:01,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-23 13:40:01,809 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-23 13:40:01,816 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,817 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:40:01,818 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,818 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:40:01,819 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-23 13:40:01,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,831 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,832 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-23 13:40:01,833 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-02-23 13:40:01,833 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2021-02-23 13:40:01,834 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,835 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-23 13:40:01,836 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,837 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 18 [2021-02-23 13:40:01,847 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,848 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 13:40:01,849 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,850 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 13:40:01,851 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,852 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 13:40:01,853 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,854 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 13:40:01,855 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,856 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 13:40:01,857 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,858 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 13:40:01,859 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,860 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 13:40:01,861 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,862 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-02-23 13:40:01,864 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 13:40:01,873 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,874 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-23 13:40:01,876 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-02-23 13:40:01,878 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 13:40:01,881 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,882 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-23 13:40:01,883 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-23 13:40:01,885 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 13:40:01,893 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 13:40:01,896 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,897 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 13:40:01,898 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-23 13:40:01,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 13:40:01,900 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 13:40:01,902 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,903 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 15 [2021-02-23 13:40:01,904 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-02-23 13:40:01,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-02-23 13:40:01,906 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,907 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-02-23 13:40:01,908 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-02-23 13:40:01,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-02-23 13:40:01,919 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,921 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 13:40:01,921 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,922 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:40:01,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-23 13:40:01,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,940 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-02-23 13:40:01,942 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,943 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 13:40:01,944 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,944 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 13:40:01,945 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-02-23 13:40:01,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,954 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,955 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:40:01,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-02-23 13:40:01,956 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2021-02-23 13:40:01,957 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,958 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:40:01,958 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,959 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 13:40:01,961 WARN L141 QuantifierPusher]: treesize reduction 15, result has 6.3 percent of original size [2021-02-23 13:40:01,961 WARN L147 QuantifierPusher]: treesize reduction 15, result has 6.3 percent of original size 1 [2021-02-23 13:40:01,962 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,963 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:40:01,964 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,964 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:40:01,965 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,966 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:40:01,967 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,967 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:40:01,968 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,969 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:40:01,970 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 13:40:01,970 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 13:40:01,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 13:40:01,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-23 13:40:01,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-02-23 13:40:01,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327127902] [2021-02-23 13:40:01,974 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-23 13:40:01,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 13:40:01,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-23 13:40:01,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-02-23 13:40:01,975 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 7 states. [2021-02-23 13:40:02,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 13:40:02,137 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2021-02-23 13:40:02,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-23 13:40:02,138 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2021-02-23 13:40:02,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 13:40:02,139 INFO L225 Difference]: With dead ends: 37 [2021-02-23 13:40:02,139 INFO L226 Difference]: Without dead ends: 27 [2021-02-23 13:40:02,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-02-23 13:40:02,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-02-23 13:40:02,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2021-02-23 13:40:02,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2021-02-23 13:40:02,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-02-23 13:40:02,145 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2021-02-23 13:40:02,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 13:40:02,145 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-02-23 13:40:02,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-02-23 13:40:02,146 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-02-23 13:40:02,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-02-23 13:40:02,146 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 13:40:02,146 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 13:40:02,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-02-23 13:40:02,360 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 13:40:02,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 13:40:02,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1821561269, now seen corresponding path program 1 times [2021-02-23 13:40:02,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 13:40:02,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052619707] [2021-02-23 13:40:02,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 13:40:02,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 13:40:02,401 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 13:40:02,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-23 13:40:02,457 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-23 13:40:02,509 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-02-23 13:40:02,509 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-23 13:40:02,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 13:40:02,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 01:40:02 BoogieIcfgContainer [2021-02-23 13:40:02,566 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-23 13:40:02,568 INFO L168 Benchmark]: Toolchain (without parser) took 4729.40 ms. Allocated memory was 154.1 MB in the beginning and 185.6 MB in the end (delta: 31.5 MB). Free memory was 128.0 MB in the beginning and 114.5 MB in the end (delta: 13.6 MB). Peak memory consumption was 45.9 MB. Max. memory is 8.0 GB. [2021-02-23 13:40:02,569 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 154.1 MB. Free memory is still 126.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 13:40:02,569 INFO L168 Benchmark]: CACSL2BoogieTranslator took 602.09 ms. Allocated memory is still 154.1 MB. Free memory was 126.9 MB in the beginning and 136.2 MB in the end (delta: -9.3 MB). Peak memory consumption was 26.8 MB. Max. memory is 8.0 GB. [2021-02-23 13:40:02,570 INFO L168 Benchmark]: Boogie Preprocessor took 176.51 ms. Allocated memory is still 154.1 MB. Free memory was 136.2 MB in the beginning and 133.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. [2021-02-23 13:40:02,570 INFO L168 Benchmark]: RCFGBuilder took 1239.70 ms. Allocated memory is still 154.1 MB. Free memory was 133.1 MB in the beginning and 77.5 MB in the end (delta: 55.6 MB). Peak memory consumption was 54.5 MB. Max. memory is 8.0 GB. [2021-02-23 13:40:02,571 INFO L168 Benchmark]: TraceAbstraction took 2691.61 ms. Allocated memory was 154.1 MB in the beginning and 185.6 MB in the end (delta: 31.5 MB). Free memory was 77.0 MB in the beginning and 114.5 MB in the end (delta: -37.5 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-02-23 13:40:02,575 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 154.1 MB. Free memory is still 126.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 602.09 ms. Allocated memory is still 154.1 MB. Free memory was 126.9 MB in the beginning and 136.2 MB in the end (delta: -9.3 MB). Peak memory consumption was 26.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 176.51 ms. Allocated memory is still 154.1 MB. Free memory was 136.2 MB in the beginning and 133.1 MB in the end (delta: 3.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1239.70 ms. Allocated memory is still 154.1 MB. Free memory was 133.1 MB in the beginning and 77.5 MB in the end (delta: 55.6 MB). Peak memory consumption was 54.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2691.61 ms. Allocated memory was 154.1 MB in the beginning and 185.6 MB in the end (delta: 31.5 MB). Free memory was 77.0 MB in the beginning and 114.5 MB in the end (delta: -37.5 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 613]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L596] List a = (List) malloc(sizeof(struct node)); VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}] [L597] COND FALSE !(a == 0) VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}] [L598] List t; [L599] List p = a; [L600] a->h = 2 VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L601] COND TRUE __VERIFIER_nondet_int() [L602] p->h = 1 [L603] t = (List) malloc(sizeof(struct node)) VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, t={-2:0}] [L604] COND FALSE !(t == 0) VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, t={-2:0}] [L605] p->n = t [L606] EXPR p->n [L606] p = p->n [L601] COND FALSE !(__VERIFIER_nondet_int()) [L608] p->h = 2 [L609] p->n = 0 [L610] p = a VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, t={-2:0}] [L611] COND TRUE p!=0 [L612] EXPR p->h VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, p->h=1, t={-2:0}] [L612] COND TRUE p->h != 2 [L613] reach_error() VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, t={-2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 67 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.5s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 81 SDtfs, 56 SDslu, 76 SDs, 0 SdLazy, 141 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 15 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 79 NumberOfCodeBlocks, 79 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 57 ConstructedInterpolants, 0 QuantifiedInterpolants, 5347 SizeOfPredicates, 6 NumberOfNonLiveVariables, 114 ConjunctsInSsa, 21 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 2/4 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...