/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 22:07:57,189 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 22:07:57,193 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 22:07:57,224 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 22:07:57,225 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 22:07:57,226 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 22:07:57,234 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 22:07:57,238 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 22:07:57,241 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 22:07:57,242 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 22:07:57,243 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 22:07:57,246 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 22:07:57,246 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 22:07:57,248 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 22:07:57,249 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 22:07:57,251 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 22:07:57,252 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 22:07:57,256 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 22:07:57,259 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 22:07:57,264 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 22:07:57,267 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 22:07:57,269 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 22:07:57,271 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 22:07:57,272 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 22:07:57,276 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-04 22:07:57,276 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-04 22:07:57,277 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-04 22:07:57,287 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-04 22:07:57,288 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-04 22:07:57,291 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-04 22:07:57,291 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 22:07:57,292 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 22:07:57,295 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 22:07:57,296 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 22:07:57,297 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 22:07:57,297 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 22:07:57,300 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 22:07:57,300 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 22:07:57,301 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 22:07:57,302 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 22:07:57,302 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 22:07:57,307 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 22:07:57,323 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 22:07:57,323 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 22:07:57,325 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 22:07:57,325 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 22:07:57,325 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 22:07:57,325 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 22:07:57,326 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 22:07:57,326 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 22:07:57,326 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 22:07:57,326 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 22:07:57,327 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 22:07:57,327 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 22:07:57,328 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 22:07:57,328 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 22:07:57,328 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 22:07:57,329 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 22:07:57,329 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 22:07:57,329 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 22:07:57,329 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 22:07:57,329 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 22:07:57,330 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 22:07:57,330 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 22:07:57,330 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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: Use separate solver for trace checks -> true [2020-09-04 22:07:57,796 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 22:07:57,812 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 22:07:57,816 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 22:07:57,818 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 22:07:57,819 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 22:07:57,820 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2020-09-04 22:07:57,911 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/70802d7c8/ebcac34b8968466cb7fe21b22b410584/FLAG8861a5f88 [2020-09-04 22:07:58,528 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 22:07:58,529 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext2-properties/simple_and_skiplist_2lvl-1.i [2020-09-04 22:07:58,543 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/70802d7c8/ebcac34b8968466cb7fe21b22b410584/FLAG8861a5f88 [2020-09-04 22:07:58,823 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/70802d7c8/ebcac34b8968466cb7fe21b22b410584 [2020-09-04 22:07:58,836 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 22:07:58,838 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 22:07:58,839 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 22:07:58,840 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 22:07:58,844 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 22:07:58,845 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 10:07:58" (1/1) ... [2020-09-04 22:07:58,849 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42a688b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:07:58, skipping insertion in model container [2020-09-04 22:07:58,849 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 10:07:58" (1/1) ... [2020-09-04 22:07:58,856 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 22:07:58,920 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 22:07:59,434 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 22:07:59,447 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 22:07:59,514 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 22:07:59,571 INFO L208 MainTranslator]: Completed translation [2020-09-04 22:07:59,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:07:59 WrapperNode [2020-09-04 22:07:59,572 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 22:07:59,573 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 22:07:59,573 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 22:07:59,573 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 22:07:59,590 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:07:59" (1/1) ... [2020-09-04 22:07:59,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:07:59" (1/1) ... [2020-09-04 22:07:59,619 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:07:59" (1/1) ... [2020-09-04 22:07:59,619 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:07:59" (1/1) ... [2020-09-04 22:07:59,643 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:07:59" (1/1) ... [2020-09-04 22:07:59,652 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:07:59" (1/1) ... [2020-09-04 22:07:59,656 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:07:59" (1/1) ... [2020-09-04 22:07:59,663 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 22:07:59,664 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 22:07:59,664 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 22:07:59,664 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 22:07:59,665 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:07:59" (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 [2020-09-04 22:07:59,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 22:07:59,744 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 22:07:59,744 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-04 22:07:59,744 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-04 22:07:59,745 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_or_die [2020-09-04 22:07:59,745 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sl_with_head_and_tail [2020-09-04 22:07:59,745 INFO L138 BoogieDeclarations]: Found implementation of procedure sl_random_insert [2020-09-04 22:07:59,745 INFO L138 BoogieDeclarations]: Found implementation of procedure destroy_sl [2020-09-04 22:07:59,745 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-04 22:07:59,745 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 22:07:59,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 22:07:59,746 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 22:07:59,746 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-04 22:07:59,746 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-04 22:07:59,747 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-04 22:07:59,747 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-04 22:07:59,747 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-04 22:07:59,747 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-04 22:07:59,747 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-04 22:07:59,748 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-04 22:07:59,748 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-04 22:07:59,748 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-04 22:07:59,748 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-04 22:07:59,748 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-04 22:07:59,749 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-04 22:07:59,749 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-04 22:07:59,749 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-04 22:07:59,749 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-04 22:07:59,749 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-04 22:07:59,749 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-04 22:07:59,750 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-04 22:07:59,750 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-04 22:07:59,750 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-04 22:07:59,750 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-04 22:07:59,750 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-04 22:07:59,751 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-04 22:07:59,751 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-04 22:07:59,751 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-04 22:07:59,751 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-04 22:07:59,751 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-04 22:07:59,751 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-04 22:07:59,752 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-04 22:07:59,752 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-04 22:07:59,752 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-04 22:07:59,752 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-04 22:07:59,752 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-04 22:07:59,752 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-04 22:07:59,752 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-04 22:07:59,753 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-04 22:07:59,753 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-04 22:07:59,753 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-04 22:07:59,753 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-04 22:07:59,753 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-04 22:07:59,753 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-04 22:07:59,753 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-04 22:07:59,753 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-04 22:07:59,753 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-04 22:07:59,754 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-04 22:07:59,754 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-04 22:07:59,754 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-04 22:07:59,754 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-04 22:07:59,754 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-04 22:07:59,754 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-04 22:07:59,754 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-04 22:07:59,754 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-04 22:07:59,754 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-04 22:07:59,754 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-04 22:07:59,755 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-04 22:07:59,755 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-04 22:07:59,755 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-04 22:07:59,755 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-04 22:07:59,755 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-04 22:07:59,755 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-04 22:07:59,755 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 22:07:59,756 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-04 22:07:59,756 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-04 22:07:59,756 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-04 22:07:59,756 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-04 22:07:59,756 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-04 22:07:59,756 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-04 22:07:59,757 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-04 22:07:59,757 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-04 22:07:59,757 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-04 22:07:59,757 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-04 22:07:59,757 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-04 22:07:59,757 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-04 22:07:59,758 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-04 22:07:59,758 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-04 22:07:59,758 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-04 22:07:59,758 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-04 22:07:59,758 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-04 22:07:59,758 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-04 22:07:59,759 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-04 22:07:59,759 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-04 22:07:59,759 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-04 22:07:59,759 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-04 22:07:59,759 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-04 22:07:59,759 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-04 22:07:59,759 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-04 22:07:59,760 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-04 22:07:59,760 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-04 22:07:59,760 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-04 22:07:59,760 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-04 22:07:59,760 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-04 22:07:59,760 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-04 22:07:59,761 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-04 22:07:59,761 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-04 22:07:59,761 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-04 22:07:59,761 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-04 22:07:59,761 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-04 22:07:59,761 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-04 22:07:59,761 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-04 22:07:59,762 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-04 22:07:59,762 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-04 22:07:59,762 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-04 22:07:59,762 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-04 22:07:59,762 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-04 22:07:59,762 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_or_die [2020-09-04 22:07:59,762 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-04 22:07:59,763 INFO L130 BoogieDeclarations]: Found specification of procedure create_sl_with_head_and_tail [2020-09-04 22:07:59,763 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-04 22:07:59,763 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-04 22:07:59,763 INFO L130 BoogieDeclarations]: Found specification of procedure sl_random_insert [2020-09-04 22:07:59,763 INFO L130 BoogieDeclarations]: Found specification of procedure destroy_sl [2020-09-04 22:07:59,763 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 22:07:59,763 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-04 22:07:59,764 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 22:07:59,764 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 22:07:59,764 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 22:07:59,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 22:07:59,764 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 22:08:00,162 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-04 22:08:00,554 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 22:08:00,554 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-04 22:08:00,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 10:08:00 BoogieIcfgContainer [2020-09-04 22:08:00,564 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 22:08:00,567 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 22:08:00,567 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 22:08:00,571 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 22:08:00,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 10:07:58" (1/3) ... [2020-09-04 22:08:00,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fc53747 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 10:08:00, skipping insertion in model container [2020-09-04 22:08:00,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 10:07:59" (2/3) ... [2020-09-04 22:08:00,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fc53747 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 10:08:00, skipping insertion in model container [2020-09-04 22:08:00,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 10:08:00" (3/3) ... [2020-09-04 22:08:00,580 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_and_skiplist_2lvl-1.i [2020-09-04 22:08:00,591 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 22:08:00,605 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 22:08:00,628 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 22:08:00,657 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 22:08:00,657 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 22:08:00,657 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 22:08:00,657 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 22:08:00,657 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 22:08:00,658 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 22:08:00,658 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 22:08:00,658 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 22:08:00,679 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states. [2020-09-04 22:08:00,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-04 22:08:00,693 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:08:00,694 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:08:00,694 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:08:00,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:08:00,701 INFO L82 PathProgramCache]: Analyzing trace with hash -648190388, now seen corresponding path program 1 times [2020-09-04 22:08:00,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:08:00,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049663615] [2020-09-04 22:08:00,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:08:00,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:00,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:08:00,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:00,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:08:00,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049663615] [2020-09-04 22:08:00,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 22:08:00,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 22:08:00,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109104455] [2020-09-04 22:08:00,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 22:08:00,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:08:00,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 22:08:00,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 22:08:00,992 INFO L87 Difference]: Start difference. First operand 157 states. Second operand 3 states. [2020-09-04 22:08:01,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:08:01,263 INFO L93 Difference]: Finished difference Result 299 states and 333 transitions. [2020-09-04 22:08:01,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 22:08:01,265 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-09-04 22:08:01,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:08:01,276 INFO L225 Difference]: With dead ends: 299 [2020-09-04 22:08:01,277 INFO L226 Difference]: Without dead ends: 38 [2020-09-04 22:08:01,283 INFO L675 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 [2020-09-04 22:08:01,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-04 22:08:01,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-09-04 22:08:01,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-04 22:08:01,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-09-04 22:08:01,333 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 22 [2020-09-04 22:08:01,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:08:01,334 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-09-04 22:08:01,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 22:08:01,334 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-09-04 22:08:01,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-04 22:08:01,336 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:08:01,336 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:08:01,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 22:08:01,336 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:08:01,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:08:01,337 INFO L82 PathProgramCache]: Analyzing trace with hash -388732234, now seen corresponding path program 1 times [2020-09-04 22:08:01,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:08:01,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534837176] [2020-09-04 22:08:01,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:08:01,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:01,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:08:01,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:01,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:08:01,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534837176] [2020-09-04 22:08:01,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 22:08:01,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-04 22:08:01,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552013348] [2020-09-04 22:08:01,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 22:08:01,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:08:01,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 22:08:01,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-04 22:08:01,509 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 8 states. [2020-09-04 22:08:01,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:08:01,702 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2020-09-04 22:08:01,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-04 22:08:01,702 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-09-04 22:08:01,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:08:01,704 INFO L225 Difference]: With dead ends: 80 [2020-09-04 22:08:01,704 INFO L226 Difference]: Without dead ends: 77 [2020-09-04 22:08:01,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-04 22:08:01,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-04 22:08:01,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 47. [2020-09-04 22:08:01,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-04 22:08:01,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2020-09-04 22:08:01,717 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 24 [2020-09-04 22:08:01,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:08:01,718 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2020-09-04 22:08:01,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 22:08:01,718 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2020-09-04 22:08:01,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-04 22:08:01,719 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:08:01,720 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:08:01,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 22:08:01,720 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:08:01,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:08:01,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1490085289, now seen corresponding path program 1 times [2020-09-04 22:08:01,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:08:01,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968190215] [2020-09-04 22:08:01,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:08:01,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:01,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 22:08:01,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 22:08:01,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 22:08:01,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968190215] [2020-09-04 22:08:01,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 22:08:01,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-04 22:08:01,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035808866] [2020-09-04 22:08:01,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 22:08:01,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 22:08:01,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 22:08:01,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-09-04 22:08:01,978 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand 10 states. [2020-09-04 22:08:02,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 22:08:02,320 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2020-09-04 22:08:02,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 22:08:02,321 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-09-04 22:08:02,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 22:08:02,322 INFO L225 Difference]: With dead ends: 79 [2020-09-04 22:08:02,322 INFO L226 Difference]: Without dead ends: 57 [2020-09-04 22:08:02,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-09-04 22:08:02,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-04 22:08:02,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 40. [2020-09-04 22:08:02,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-04 22:08:02,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-09-04 22:08:02,332 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 31 [2020-09-04 22:08:02,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 22:08:02,332 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-09-04 22:08:02,332 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 22:08:02,333 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-09-04 22:08:02,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-04 22:08:02,334 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 22:08:02,334 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 22:08:02,334 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 22:08:02,334 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 22:08:02,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 22:08:02,335 INFO L82 PathProgramCache]: Analyzing trace with hash 2115770941, now seen corresponding path program 1 times [2020-09-04 22:08:02,335 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 22:08:02,335 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625478340] [2020-09-04 22:08:02,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 22:08:02,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 22:08:02,366 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 22:08:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 22:08:02,395 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 22:08:02,438 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 22:08:02,439 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 22:08:02,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 22:08:02,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 10:08:02 BoogieIcfgContainer [2020-09-04 22:08:02,480 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 22:08:02,484 INFO L168 Benchmark]: Toolchain (without parser) took 3644.65 ms. Allocated memory was 140.0 MB in the beginning and 247.5 MB in the end (delta: 107.5 MB). Free memory was 103.3 MB in the beginning and 182.8 MB in the end (delta: -79.5 MB). Peak memory consumption was 28.0 MB. Max. memory is 7.1 GB. [2020-09-04 22:08:02,485 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 140.0 MB. Free memory was 122.6 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 22:08:02,486 INFO L168 Benchmark]: CACSL2BoogieTranslator took 732.88 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 102.9 MB in the beginning and 169.4 MB in the end (delta: -66.4 MB). Peak memory consumption was 26.0 MB. Max. memory is 7.1 GB. [2020-09-04 22:08:02,487 INFO L168 Benchmark]: Boogie Preprocessor took 90.88 ms. Allocated memory is still 203.9 MB. Free memory was 168.7 MB in the beginning and 165.5 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB. [2020-09-04 22:08:02,488 INFO L168 Benchmark]: RCFGBuilder took 900.34 ms. Allocated memory is still 203.9 MB. Free memory was 165.5 MB in the beginning and 101.0 MB in the end (delta: 64.4 MB). Peak memory consumption was 64.4 MB. Max. memory is 7.1 GB. [2020-09-04 22:08:02,489 INFO L168 Benchmark]: TraceAbstraction took 1913.23 ms. Allocated memory was 203.9 MB in the beginning and 247.5 MB in the end (delta: 43.5 MB). Free memory was 100.4 MB in the beginning and 182.8 MB in the end (delta: -82.4 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 22:08:02,493 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 140.0 MB. Free memory was 122.6 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 732.88 ms. Allocated memory was 140.0 MB in the beginning and 203.9 MB in the end (delta: 64.0 MB). Free memory was 102.9 MB in the beginning and 169.4 MB in the end (delta: -66.4 MB). Peak memory consumption was 26.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 90.88 ms. Allocated memory is still 203.9 MB. Free memory was 168.7 MB in the beginning and 165.5 MB in the end (delta: 3.2 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 900.34 ms. Allocated memory is still 203.9 MB. Free memory was 165.5 MB in the beginning and 101.0 MB in the end (delta: 64.4 MB). Peak memory consumption was 64.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1913.23 ms. Allocated memory was 203.9 MB in the beginning and 247.5 MB in the end (delta: 43.5 MB). Free memory was 100.4 MB in the beginning and 182.8 MB in the end (delta: -82.4 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 602]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L585] List a = (List) malloc(sizeof(struct node)); VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}] [L586] COND FALSE !(a == 0) VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}] [L587] List t; VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}] [L588] List p = a; VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L589] a->h = 2 VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L590] COND TRUE __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=1, a={-1:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L591] p->h = 1 VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, p={-1:0}] [L592] 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}] [L593] 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}] [L594] p->n = t VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, t={-2:0}] [L595] EXPR p->n VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, p->n={-2:0}, t={-2:0}] [L595] p = p->n VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-2:0}, p->n={-2:0}, t={-2:0}] [L590] COND FALSE !(__VERIFIER_nondet_int()) VAL [__VERIFIER_nondet_int()=0, a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-2:0}, t={-2:0}] [L597] p->h = 2 VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-2:0}, t={-2:0}] [L598] p->n = 0 VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-2:0}, t={-2:0}] [L599] p = a VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, t={-2:0}] [L600] COND TRUE p!=0 VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, t={-2:0}] [L601] 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}] [L601] COND TRUE p->h != 2 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}] [L602] __VERIFIER_error() VAL [a={-1:0}, malloc(sizeof(struct node))={-1:0}, malloc(sizeof(struct node))={-2:0}, p={-1:0}, t={-2:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 10 procedures, 173 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.7s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 216 SDtfs, 253 SDslu, 242 SDs, 0 SdLazy, 342 SolverSat, 33 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=157occurred 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, 47 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 112 NumberOfCodeBlocks, 112 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 74 ConstructedInterpolants, 0 QuantifiedInterpolants, 10045 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 2 PerfectInterpolantSequences, 2/3 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...