/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 0.2.0-7d8eed3 [2020-11-06 22:31:06,928 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:31:06,931 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:31:06,980 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:31:06,981 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:31:06,985 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:31:06,989 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:31:06,996 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:31:06,999 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:31:07,005 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:31:07,006 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:31:07,008 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:31:07,008 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:31:07,011 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:31:07,013 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:31:07,014 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:31:07,015 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:31:07,018 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:31:07,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:31:07,037 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:31:07,039 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:31:07,040 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:31:07,041 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:31:07,042 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:31:07,045 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-06 22:31:07,045 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-06 22:31:07,045 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-06 22:31:07,046 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-06 22:31:07,046 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-06 22:31:07,047 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-06 22:31:07,048 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-06 22:31:07,049 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-06 22:31:07,049 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-06 22:31:07,050 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-06 22:31:07,051 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-06 22:31:07,051 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-06 22:31:07,052 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-06 22:31:07,052 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-06 22:31:07,053 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:31:07,053 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:31:07,054 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:31:07,055 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 [2020-11-06 22:31:07,081 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:31:07,081 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:31:07,083 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:31:07,083 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:31:07,083 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:31:07,083 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:31:07,084 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:31:07,084 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:31:07,084 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:31:07,084 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:31:07,084 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:31:07,085 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:31:07,085 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:31:07,085 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:31:07,085 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:31:07,085 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:31:07,086 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:31:07,086 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:31:07,086 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:31:07,086 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:31:07,086 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:31:07,087 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:31:07,087 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:31:07,087 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:31:07,087 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:31:07,087 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:31:07,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:31:07,088 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:31:07,088 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:31:07,088 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:31:07,468 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:31:07,494 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:31:07,497 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:31:07,498 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:31:07,499 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:31:07,500 INFO L432 ainManager$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 [2020-11-06 22:31:07,581 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/444b24e29/5c1c9572011c42dcb63d48eba90d8806/FLAGd7374f3df [2020-11-06 22:31:08,273 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:31:08,273 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2020-11-06 22:31:08,290 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/444b24e29/5c1c9572011c42dcb63d48eba90d8806/FLAGd7374f3df [2020-11-06 22:31:08,551 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/444b24e29/5c1c9572011c42dcb63d48eba90d8806 [2020-11-06 22:31:08,557 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:31:08,566 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:31:08,570 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:31:08,570 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:31:08,574 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:31:08,575 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:31:08" (1/1) ... [2020-11-06 22:31:08,579 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c831a90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:08, skipping insertion in model container [2020-11-06 22:31:08,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:31:08" (1/1) ... [2020-11-06 22:31:08,587 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:31:08,649 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:31:08,999 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:31:09,010 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:31:09,092 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:31:09,177 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:31:09,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:09 WrapperNode [2020-11-06 22:31:09,178 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:31:09,179 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:31:09,180 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:31:09,180 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:31:09,192 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:09" (1/1) ... [2020-11-06 22:31:09,195 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:09" (1/1) ... [2020-11-06 22:31:09,226 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:09" (1/1) ... [2020-11-06 22:31:09,227 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:09" (1/1) ... [2020-11-06 22:31:09,270 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:09" (1/1) ... [2020-11-06 22:31:09,279 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:09" (1/1) ... [2020-11-06 22:31:09,292 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:09" (1/1) ... [2020-11-06 22:31:09,304 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:31:09,305 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:31:09,305 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:31:09,305 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:31:09,306 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:09" (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 [2020-11-06 22:31:09,400 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:31:09,401 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:31:09,401 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:31:09,401 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-11-06 22:31:09,401 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-11-06 22:31:09,402 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die [2020-11-06 22:31:09,402 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sl_with_head_and_tail [2020-11-06 22:31:09,402 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_random_insert [2020-11-06 22:31:09,402 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_sl [2020-11-06 22:31:09,403 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-11-06 22:31:09,403 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:31:09,403 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:31:09,404 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:31:09,404 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-06 22:31:09,405 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-06 22:31:09,405 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:31:09,406 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:31:09,406 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:31:09,406 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-11-06 22:31:09,406 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-11-06 22:31:09,406 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-11-06 22:31:09,406 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-11-06 22:31:09,407 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-11-06 22:31:09,407 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-11-06 22:31:09,407 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-11-06 22:31:09,407 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-11-06 22:31:09,407 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-11-06 22:31:09,407 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-11-06 22:31:09,407 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-11-06 22:31:09,407 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-11-06 22:31:09,408 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-11-06 22:31:09,408 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-11-06 22:31:09,408 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-11-06 22:31:09,408 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-11-06 22:31:09,408 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-11-06 22:31:09,408 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-11-06 22:31:09,408 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-11-06 22:31:09,409 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-11-06 22:31:09,409 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-11-06 22:31:09,409 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-11-06 22:31:09,409 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-11-06 22:31:09,409 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-11-06 22:31:09,409 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-11-06 22:31:09,409 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-11-06 22:31:09,409 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-11-06 22:31:09,410 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-11-06 22:31:09,410 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-11-06 22:31:09,410 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-11-06 22:31:09,410 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-11-06 22:31:09,410 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-11-06 22:31:09,410 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-11-06 22:31:09,410 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-11-06 22:31:09,410 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-11-06 22:31:09,411 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-11-06 22:31:09,411 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-11-06 22:31:09,411 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-11-06 22:31:09,412 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-11-06 22:31:09,412 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-11-06 22:31:09,412 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-11-06 22:31:09,412 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-11-06 22:31:09,412 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-11-06 22:31:09,412 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-11-06 22:31:09,412 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-11-06 22:31:09,413 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-11-06 22:31:09,413 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-11-06 22:31:09,413 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-11-06 22:31:09,413 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-11-06 22:31:09,414 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-11-06 22:31:09,414 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-11-06 22:31:09,414 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-11-06 22:31:09,414 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-06 22:31:09,414 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-11-06 22:31:09,414 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-11-06 22:31:09,415 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-11-06 22:31:09,415 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-11-06 22:31:09,415 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-11-06 22:31:09,415 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-11-06 22:31:09,415 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-11-06 22:31:09,416 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-11-06 22:31:09,416 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-11-06 22:31:09,416 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-11-06 22:31:09,416 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-11-06 22:31:09,417 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-11-06 22:31:09,417 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-11-06 22:31:09,417 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-11-06 22:31:09,418 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-11-06 22:31:09,418 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-11-06 22:31:09,418 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-11-06 22:31:09,419 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-11-06 22:31:09,419 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-11-06 22:31:09,419 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-11-06 22:31:09,419 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-11-06 22:31:09,419 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-11-06 22:31:09,420 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-11-06 22:31:09,420 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-11-06 22:31:09,420 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-11-06 22:31:09,420 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-11-06 22:31:09,420 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-11-06 22:31:09,420 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-11-06 22:31:09,420 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-11-06 22:31:09,420 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-11-06 22:31:09,421 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-11-06 22:31:09,421 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-11-06 22:31:09,421 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-11-06 22:31:09,421 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-11-06 22:31:09,421 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-11-06 22:31:09,421 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-11-06 22:31:09,421 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-11-06 22:31:09,421 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-11-06 22:31:09,422 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-11-06 22:31:09,422 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-11-06 22:31:09,422 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-11-06 22:31:09,422 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-11-06 22:31:09,422 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-11-06 22:31:09,422 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-11-06 22:31:09,422 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-11-06 22:31:09,424 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-11-06 22:31:09,424 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-11-06 22:31:09,424 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-11-06 22:31:09,424 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-11-06 22:31:09,424 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-11-06 22:31:09,425 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-11-06 22:31:09,425 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die [2020-11-06 22:31:09,425 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-06 22:31:09,425 INFO L130 BoogieDeclarations]: Found specification of procedure create_sl_with_head_and_tail [2020-11-06 22:31:09,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-06 22:31:09,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-06 22:31:09,425 INFO L130 BoogieDeclarations]: Found specification of procedure sl_random_insert [2020-11-06 22:31:09,426 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_sl [2020-11-06 22:31:09,426 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:31:09,426 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-11-06 22:31:09,426 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:31:09,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:31:09,427 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:31:09,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:31:09,427 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:31:09,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:31:09,794 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-11-06 22:31:10,076 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:31:10,076 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-11-06 22:31:10,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:31:10 BoogieIcfgContainer [2020-11-06 22:31:10,078 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:31:10,080 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:31:10,081 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:31:10,084 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:31:10,084 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:31:08" (1/3) ... [2020-11-06 22:31:10,085 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2245be3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:31:10, skipping insertion in model container [2020-11-06 22:31:10,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:31:09" (2/3) ... [2020-11-06 22:31:10,086 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2245be3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:31:10, skipping insertion in model container [2020-11-06 22:31:10,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:31:10" (3/3) ... [2020-11-06 22:31:10,088 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_and_skiplist_2lvl-1.i [2020-11-06 22:31:10,103 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:31:10,107 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:31:10,119 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:31:10,146 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:31:10,146 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:31:10,146 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:31:10,146 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:31:10,146 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:31:10,146 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:31:10,147 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:31:10,147 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:31:10,164 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states. [2020-11-06 22:31:10,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-06 22:31:10,171 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:31:10,171 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:31:10,172 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:31:10,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:31:10,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1562599215, now seen corresponding path program 1 times [2020-11-06 22:31:10,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:31:10,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897431661] [2020-11-06 22:31:10,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:31:10,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:31:10,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:31:10,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:31:10,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:31:10,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897431661] [2020-11-06 22:31:10,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:31:10,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-06 22:31:10,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353141950] [2020-11-06 22:31:10,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-06 22:31:10,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:31:10,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-06 22:31:10,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-06 22:31:10,446 INFO L87 Difference]: Start difference. First operand 59 states. Second operand 3 states. [2020-11-06 22:31:10,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:31:10,640 INFO L93 Difference]: Finished difference Result 102 states and 139 transitions. [2020-11-06 22:31:10,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-06 22:31:10,641 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-11-06 22:31:10,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:31:10,649 INFO L225 Difference]: With dead ends: 102 [2020-11-06 22:31:10,650 INFO L226 Difference]: Without dead ends: 20 [2020-11-06 22:31:10,653 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 [2020-11-06 22:31:10,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-11-06 22:31:10,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-11-06 22:31:10,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-11-06 22:31:10,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-11-06 22:31:10,727 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2020-11-06 22:31:10,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:31:10,728 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-11-06 22:31:10,728 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-06 22:31:10,728 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-11-06 22:31:10,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-06 22:31:10,729 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:31:10,729 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:31:10,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:31:10,730 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:31:10,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:31:10,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1021400540, now seen corresponding path program 1 times [2020-11-06 22:31:10,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:31:10,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838159870] [2020-11-06 22:31:10,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:31:10,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:31:10,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:31:10,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:31:10,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:31:10,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838159870] [2020-11-06 22:31:10,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:31:10,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:31:10,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383446445] [2020-11-06 22:31:10,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:31:10,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:31:10,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:31:10,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:31:10,975 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2020-11-06 22:31:11,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:31:11,103 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-11-06 22:31:11,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:31:11,103 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-11-06 22:31:11,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:31:11,106 INFO L225 Difference]: With dead ends: 36 [2020-11-06 22:31:11,106 INFO L226 Difference]: Without dead ends: 32 [2020-11-06 22:31:11,107 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-11-06 22:31:11,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-06 22:31:11,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2020-11-06 22:31:11,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-06 22:31:11,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-11-06 22:31:11,116 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 16 [2020-11-06 22:31:11,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:31:11,116 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-11-06 22:31:11,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:31:11,116 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-11-06 22:31:11,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-06 22:31:11,117 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:31:11,118 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:31:11,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:31:11,118 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:31:11,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:31:11,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1745502243, now seen corresponding path program 1 times [2020-11-06 22:31:11,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:31:11,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049262770] [2020-11-06 22:31:11,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:31:11,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:31:11,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:31:11,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:31:11,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:31:11,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049262770] [2020-11-06 22:31:11,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362374599] [2020-11-06 22:31:11,265 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 [2020-11-06 22:31:11,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:31:11,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-06 22:31:11,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-06 22:31:11,475 INFO L382 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 [2020-11-06 22:31:11,475 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:31:11,490 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:31:11,495 INFO L382 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 [2020-11-06 22:31:11,495 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-06 22:31:11,503 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:31:11,503 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:31:11,504 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2020-11-06 22:31:11,534 INFO L382 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 [2020-11-06 22:31:11,535 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-06 22:31:11,543 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:31:11,546 INFO L382 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 [2020-11-06 22:31:11,547 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-06 22:31:11,552 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-06 22:31:11,553 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-06 22:31:11,553 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2020-11-06 22:31:11,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:31:11,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-06 22:31:11,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2020-11-06 22:31:11,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250030947] [2020-11-06 22:31:11,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-06 22:31:11,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:31:11,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-06 22:31:11,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:31:11,558 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 7 states. [2020-11-06 22:31:11,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:31:11,691 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-11-06 22:31:11,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-06 22:31:11,692 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-11-06 22:31:11,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:31:11,693 INFO L225 Difference]: With dead ends: 40 [2020-11-06 22:31:11,693 INFO L226 Difference]: Without dead ends: 28 [2020-11-06 22:31:11,693 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-06 22:31:11,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-06 22:31:11,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2020-11-06 22:31:11,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-06 22:31:11,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-11-06 22:31:11,698 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2020-11-06 22:31:11,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:31:11,699 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-11-06 22:31:11,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-06 22:31:11,699 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-11-06 22:31:11,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-06 22:31:11,700 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:31:11,700 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:31:11,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-06 22:31:11,913 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:31:11,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:31:11,914 INFO L82 PathProgramCache]: Analyzing trace with hash -727649085, now seen corresponding path program 1 times [2020-11-06 22:31:11,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:31:11,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265712431] [2020-11-06 22:31:11,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:31:11,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:31:11,939 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:31:11,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:31:11,972 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:31:12,014 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-06 22:31:12,014 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-06 22:31:12,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-06 22:31:12,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:31:12 BoogieIcfgContainer [2020-11-06 22:31:12,062 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:31:12,065 INFO L168 Benchmark]: Toolchain (without parser) took 3503.92 ms. Allocated memory was 151.0 MB in the beginning and 185.6 MB in the end (delta: 34.6 MB). Free memory was 125.1 MB in the beginning and 148.9 MB in the end (delta: -23.8 MB). Peak memory consumption was 10.9 MB. Max. memory is 8.0 GB. [2020-11-06 22:31:12,065 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 151.0 MB. Free memory is still 123.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:31:12,067 INFO L168 Benchmark]: CACSL2BoogieTranslator took 609.02 ms. Allocated memory is still 151.0 MB. Free memory was 124.5 MB in the beginning and 101.5 MB in the end (delta: 23.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:31:12,068 INFO L168 Benchmark]: Boogie Preprocessor took 124.88 ms. Allocated memory is still 151.0 MB. Free memory was 101.4 MB in the beginning and 98.4 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-11-06 22:31:12,074 INFO L168 Benchmark]: RCFGBuilder took 773.57 ms. Allocated memory is still 151.0 MB. Free memory was 98.3 MB in the beginning and 80.1 MB in the end (delta: 18.2 MB). Peak memory consumption was 19.5 MB. Max. memory is 8.0 GB. [2020-11-06 22:31:12,074 INFO L168 Benchmark]: TraceAbstraction took 1981.58 ms. Allocated memory was 151.0 MB in the beginning and 185.6 MB in the end (delta: 34.6 MB). Free memory was 79.5 MB in the beginning and 148.9 MB in the end (delta: -69.4 MB). There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:31:12,085 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 151.0 MB. Free memory is still 123.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 609.02 ms. Allocated memory is still 151.0 MB. Free memory was 124.5 MB in the beginning and 101.5 MB in the end (delta: 23.0 MB). Peak memory consumption was 23.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 124.88 ms. Allocated memory is still 151.0 MB. Free memory was 101.4 MB in the beginning and 98.4 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 773.57 ms. Allocated memory is still 151.0 MB. Free memory was 98.3 MB in the beginning and 80.1 MB in the end (delta: 18.2 MB). Peak memory consumption was 19.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1981.58 ms. Allocated memory was 151.0 MB in the beginning and 185.6 MB in the end (delta: 34.6 MB). Free memory was 79.5 MB in the beginning and 148.9 MB in the end (delta: -69.4 MB). There was no memory consumed. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_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] CALL reach_error() [L12] COND FALSE !(0) [L12] __assert_fail ("0", "simple_and_skiplist_2lvl-1.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 69 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.8s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 87 SDtfs, 58 SDslu, 77 SDs, 0 SdLazy, 149 SolverSat, 24 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred 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, 13 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 89 NumberOfCodeBlocks, 89 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 65 ConstructedInterpolants, 0 QuantifiedInterpolants, 6187 SizeOfPredicates, 7 NumberOfNonLiveVariables, 118 ConjunctsInSsa, 19 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...