/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 --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:15:24,406 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:15:24,409 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:15:24,447 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:15:24,448 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:15:24,449 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:15:24,451 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:15:24,454 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:15:24,456 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:15:24,458 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:15:24,459 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:15:24,461 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:15:24,461 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:15:24,463 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:15:24,464 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:15:24,466 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:15:24,467 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:15:24,468 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:15:24,471 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:15:24,473 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:15:24,476 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:15:24,478 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:15:24,480 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:15:24,481 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:15:24,489 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:15:24,490 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:15:24,493 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:15:24,494 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:15:24,495 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:15:24,499 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:15:24,500 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:15:24,501 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:15:24,502 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:15:24,503 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:15:24,517 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:15:24,518 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:15:24,519 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:15:24,519 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:15:24,519 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:15:24,521 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:15:24,522 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:15:24,523 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 01:15:24,551 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:15:24,551 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:15:24,553 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:15:24,553 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:15:24,554 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:15:24,554 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:15:24,554 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:15:24,554 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:15:24,554 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:15:24,555 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:15:24,555 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:15:24,555 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:15:24,555 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:15:24,555 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:15:24,556 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:15:24,556 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:15:24,556 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:15:24,556 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:15:24,556 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:15:24,557 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:15:24,557 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:15:24,557 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:15:24,557 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:15:24,557 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:15:24,558 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:15:24,558 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:15:24,558 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:15:24,558 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:15:24,558 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:15:24,559 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-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:15:24,936 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:15:24,985 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:15:24,990 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:15:24,992 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:15:24,993 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:15:24,996 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2020-10-27 01:15:25,094 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8a02a1c70/93863786f95f4f028ba2d8a70dcd6d1e/FLAG1c63f9041 [2020-10-27 01:15:25,837 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:15:25,838 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2020-10-27 01:15:25,852 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8a02a1c70/93863786f95f4f028ba2d8a70dcd6d1e/FLAG1c63f9041 [2020-10-27 01:15:26,141 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8a02a1c70/93863786f95f4f028ba2d8a70dcd6d1e [2020-10-27 01:15:26,149 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:15:26,157 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:15:26,160 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:15:26,160 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:15:26,166 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:15:26,167 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:15:26" (1/1) ... [2020-10-27 01:15:26,173 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46769324 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:26, skipping insertion in model container [2020-10-27 01:15:26,174 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:15:26" (1/1) ... [2020-10-27 01:15:26,183 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:15:26,258 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:15:26,675 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:15:26,686 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:15:26,736 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:15:26,822 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:15:26,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:26 WrapperNode [2020-10-27 01:15:26,823 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:15:26,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:15:26,825 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:15:26,825 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:15:26,839 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:26" (1/1) ... [2020-10-27 01:15:26,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:26" (1/1) ... [2020-10-27 01:15:26,867 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:26" (1/1) ... [2020-10-27 01:15:26,867 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:26" (1/1) ... [2020-10-27 01:15:26,893 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:26" (1/1) ... [2020-10-27 01:15:26,899 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:26" (1/1) ... [2020-10-27 01:15:26,904 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:26" (1/1) ... [2020-10-27 01:15:26,913 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:15:26,914 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:15:26,914 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:15:26,914 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:15:26,915 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:26" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-27 01:15:26,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:15:26,997 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:15:26,997 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:15:26,998 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-27 01:15:26,998 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-27 01:15:26,998 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die [2020-10-27 01:15:26,998 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sl_with_head_and_tail [2020-10-27 01:15:26,998 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_random_insert [2020-10-27 01:15:26,999 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_sl [2020-10-27 01:15:26,999 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-27 01:15:26,999 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:15:26,999 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:15:26,999 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:15:27,000 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:15:27,000 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:15:27,000 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:15:27,000 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:15:27,000 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:15:27,001 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 01:15:27,001 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 01:15:27,001 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 01:15:27,001 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 01:15:27,001 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 01:15:27,002 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 01:15:27,002 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 01:15:27,002 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 01:15:27,002 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 01:15:27,002 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 01:15:27,003 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 01:15:27,003 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 01:15:27,003 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 01:15:27,003 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 01:15:27,003 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 01:15:27,003 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 01:15:27,004 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-27 01:15:27,004 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-27 01:15:27,004 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 01:15:27,004 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 01:15:27,004 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 01:15:27,004 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 01:15:27,005 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 01:15:27,005 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 01:15:27,005 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 01:15:27,005 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 01:15:27,005 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 01:15:27,006 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 01:15:27,006 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 01:15:27,006 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 01:15:27,006 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 01:15:27,006 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 01:15:27,007 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 01:15:27,007 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 01:15:27,007 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 01:15:27,007 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 01:15:27,007 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 01:15:27,007 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 01:15:27,008 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 01:15:27,008 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 01:15:27,008 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 01:15:27,008 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 01:15:27,008 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 01:15:27,009 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 01:15:27,009 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 01:15:27,009 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 01:15:27,009 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 01:15:27,009 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 01:15:27,010 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 01:15:27,010 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 01:15:27,010 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 01:15:27,010 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 01:15:27,010 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 01:15:27,010 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 01:15:27,011 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 01:15:27,011 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 01:15:27,011 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 01:15:27,011 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 01:15:27,012 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 01:15:27,012 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 01:15:27,012 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 01:15:27,012 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 01:15:27,012 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 01:15:27,012 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 01:15:27,013 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 01:15:27,013 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 01:15:27,013 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 01:15:27,013 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 01:15:27,013 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 01:15:27,014 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 01:15:27,014 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 01:15:27,014 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 01:15:27,014 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 01:15:27,014 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 01:15:27,014 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 01:15:27,015 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 01:15:27,015 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 01:15:27,015 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 01:15:27,015 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 01:15:27,015 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 01:15:27,015 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 01:15:27,016 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 01:15:27,016 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 01:15:27,016 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 01:15:27,016 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 01:15:27,016 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 01:15:27,017 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 01:15:27,017 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 01:15:27,017 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 01:15:27,017 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 01:15:27,017 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 01:15:27,017 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 01:15:27,018 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 01:15:27,018 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 01:15:27,018 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 01:15:27,018 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 01:15:27,018 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 01:15:27,019 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 01:15:27,019 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 01:15:27,019 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 01:15:27,019 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 01:15:27,019 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 01:15:27,020 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 01:15:27,020 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 01:15:27,020 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die [2020-10-27 01:15:27,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 01:15:27,020 INFO L130 BoogieDeclarations]: Found specification of procedure create_sl_with_head_and_tail [2020-10-27 01:15:27,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 01:15:27,021 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 01:15:27,021 INFO L130 BoogieDeclarations]: Found specification of procedure sl_random_insert [2020-10-27 01:15:27,021 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_sl [2020-10-27 01:15:27,021 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:15:27,022 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-27 01:15:27,022 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:15:27,022 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:15:27,022 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:15:27,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:15:27,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:15:27,023 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:15:27,429 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-27 01:15:27,760 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:15:27,760 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-27 01:15:27,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:15:27 BoogieIcfgContainer [2020-10-27 01:15:27,763 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:15:27,764 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:15:27,765 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:15:27,768 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:15:27,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:15:26" (1/3) ... [2020-10-27 01:15:27,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ac2e5b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:15:27, skipping insertion in model container [2020-10-27 01:15:27,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:15:26" (2/3) ... [2020-10-27 01:15:27,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ac2e5b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:15:27, skipping insertion in model container [2020-10-27 01:15:27,770 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:15:27" (3/3) ... [2020-10-27 01:15:27,772 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_and_skiplist_2lvl-1.i [2020-10-27 01:15:27,785 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:15:27,791 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:15:27,805 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:15:27,834 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:15:27,835 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:15:27,835 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:15:27,835 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:15:27,835 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:15:27,835 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:15:27,835 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:15:27,836 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:15:27,855 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states. [2020-10-27 01:15:27,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 01:15:27,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:27,863 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:15:27,863 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:27,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:27,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1562599215, now seen corresponding path program 1 times [2020-10-27 01:15:27,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:27,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105674059] [2020-10-27 01:15:27,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:28,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:28,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:28,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:28,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:28,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 01:15:28,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:15:28,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 461 [2020-10-27 01:15:28,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:28,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:15:28,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:15:28,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 01:15:28,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:15:28,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:28,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:28,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:28,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:28,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:28,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:28,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 01:15:28,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:28,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:28,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:28,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:28,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:28,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:15:28,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105674059] [2020-10-27 01:15:28,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:15:28,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:15:28,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856745167] [2020-10-27 01:15:28,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:15:28,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:28,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:15:28,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:15:28,660 INFO L87 Difference]: Start difference. First operand 59 states. Second operand 6 states. [2020-10-27 01:15:29,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:29,198 INFO L93 Difference]: Finished difference Result 125 states and 180 transitions. [2020-10-27 01:15:29,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:15:29,200 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-10-27 01:15:29,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:29,210 INFO L225 Difference]: With dead ends: 125 [2020-10-27 01:15:29,210 INFO L226 Difference]: Without dead ends: 32 [2020-10-27 01:15:29,215 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 [2020-10-27 01:15:29,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-27 01:15:29,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2020-10-27 01:15:29,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 01:15:29,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-10-27 01:15:29,265 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 15 [2020-10-27 01:15:29,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:29,266 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-10-27 01:15:29,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:15:29,266 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-10-27 01:15:29,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-27 01:15:29,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:29,268 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:15:29,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:15:29,268 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:29,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:29,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1745502243, now seen corresponding path program 1 times [2020-10-27 01:15:29,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:29,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15721092] [2020-10-27 01:15:29,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:29,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:29,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:29,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:29,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-27 01:15:29,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:29,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-10-27 01:15:29,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:29,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:15:29,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 01:15:29,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:15:29,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:29,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:15:29,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:15:29,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:15:29,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:15:29,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:15:29,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:15:29,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:15:29,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:15:29,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:15:29,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:15:29,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:15:29,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:15:29,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:15:29,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15721092] [2020-10-27 01:15:29,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:15:29,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:15:29,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117181307] [2020-10-27 01:15:29,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:15:29,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:15:29,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:15:29,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:15:29,539 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 6 states. [2020-10-27 01:15:29,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:15:29,642 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2020-10-27 01:15:29,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:15:29,643 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-27 01:15:29,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:15:29,645 INFO L225 Difference]: With dead ends: 40 [2020-10-27 01:15:29,645 INFO L226 Difference]: Without dead ends: 28 [2020-10-27 01:15:29,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:15:29,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-27 01:15:29,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2020-10-27 01:15:29,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 01:15:29,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-27 01:15:29,653 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 19 [2020-10-27 01:15:29,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:15:29,653 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-27 01:15:29,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:15:29,654 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-27 01:15:29,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-27 01:15:29,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:15:29,655 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:15:29,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:15:29,655 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:15:29,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:15:29,656 INFO L82 PathProgramCache]: Analyzing trace with hash -727649085, now seen corresponding path program 1 times [2020-10-27 01:15:29,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:15:29,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642450559] [2020-10-27 01:15:29,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:15:29,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-27 01:15:29,681 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-27 01:15:29,681 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-27 01:15:29,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:15:29,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.10 01:15:29 BoogieIcfgContainer [2020-10-27 01:15:29,706 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-27 01:15:29,709 INFO L168 Benchmark]: Toolchain (without parser) took 3555.76 ms. Allocated memory was 151.0 MB in the beginning and 201.3 MB in the end (delta: 50.3 MB). Free memory was 124.2 MB in the beginning and 105.4 MB in the end (delta: 18.8 MB). Peak memory consumption was 70.3 MB. Max. memory is 8.0 GB. [2020-10-27 01:15:29,710 INFO L168 Benchmark]: CDTParser took 1.61 ms. Allocated memory is still 151.0 MB. Free memory was 124.1 MB in the beginning and 123.7 MB in the end (delta: 435.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-27 01:15:29,711 INFO L168 Benchmark]: CACSL2BoogieTranslator took 663.97 ms. Allocated memory is still 151.0 MB. Free memory was 123.8 MB in the beginning and 100.3 MB in the end (delta: 23.5 MB). Peak memory consumption was 24.1 MB. Max. memory is 8.0 GB. [2020-10-27 01:15:29,712 INFO L168 Benchmark]: Boogie Preprocessor took 88.46 ms. Allocated memory is still 151.0 MB. Free memory was 100.3 MB in the beginning and 97.3 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-10-27 01:15:29,713 INFO L168 Benchmark]: RCFGBuilder took 848.88 ms. Allocated memory is still 151.0 MB. Free memory was 97.3 MB in the beginning and 106.0 MB in the end (delta: -8.7 MB). Peak memory consumption was 34.1 MB. Max. memory is 8.0 GB. [2020-10-27 01:15:29,714 INFO L168 Benchmark]: TraceAbstraction took 1941.24 ms. Allocated memory was 151.0 MB in the beginning and 201.3 MB in the end (delta: 50.3 MB). Free memory was 106.0 MB in the beginning and 105.4 MB in the end (delta: 562.4 kB). Peak memory consumption was 50.9 MB. Max. memory is 8.0 GB. [2020-10-27 01:15:29,718 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.61 ms. Allocated memory is still 151.0 MB. Free memory was 124.1 MB in the beginning and 123.7 MB in the end (delta: 435.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 663.97 ms. Allocated memory is still 151.0 MB. Free memory was 123.8 MB in the beginning and 100.3 MB in the end (delta: 23.5 MB). Peak memory consumption was 24.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 88.46 ms. Allocated memory is still 151.0 MB. Free memory was 100.3 MB in the beginning and 97.3 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 848.88 ms. Allocated memory is still 151.0 MB. Free memory was 97.3 MB in the beginning and 106.0 MB in the end (delta: -8.7 MB). Peak memory consumption was 34.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1941.24 ms. Allocated memory was 151.0 MB in the beginning and 201.3 MB in the end (delta: 50.3 MB). Free memory was 106.0 MB in the beginning and 105.4 MB in the end (delta: 562.4 kB). Peak memory consumption was 50.9 MB. 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)); [L597] COND FALSE !(a == 0) [L598] List t; [L599] List p = a; [L600] a->h = 2 [L601] COND TRUE __VERIFIER_nondet_int() [L602] p->h = 1 [L603] t = (List) malloc(sizeof(struct node)) [L604] COND FALSE !(t == 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 [L611] COND TRUE p!=0 [L612] EXPR p->h [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: 3, TraceHistogramMax: 2, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 73 SDtfs, 48 SDslu, 151 SDs, 0 SdLazy, 204 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s 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, 2 MinimizatonAttempts, 13 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 54 NumberOfCodeBlocks, 54 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 2972 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 1/2 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...