/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 -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 16:37:56,684 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 16:37:56,689 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 16:37:56,717 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 16:37:56,718 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 16:37:56,719 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 16:37:56,721 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 16:37:56,723 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 16:37:56,725 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 16:37:56,726 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 16:37:56,728 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 16:37:56,729 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 16:37:56,729 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 16:37:56,731 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 16:37:56,732 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 16:37:56,734 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 16:37:56,735 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 16:37:56,736 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 16:37:56,738 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 16:37:56,741 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 16:37:56,743 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 16:37:56,744 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 16:37:56,746 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 16:37:56,747 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 16:37:56,750 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-04 16:37:56,751 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-04 16:37:56,751 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-04 16:37:56,752 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-04 16:37:56,753 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-04 16:37:56,754 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-04 16:37:56,754 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 16:37:56,756 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 16:37:56,757 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 16:37:56,758 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 16:37:56,759 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 16:37:56,759 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 16:37:56,760 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 16:37:56,761 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 16:37:56,761 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 16:37:56,762 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 16:37:56,763 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 16:37:56,764 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 16:37:56,777 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 16:37:56,778 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 16:37:56,779 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 16:37:56,780 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 16:37:56,780 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 16:37:56,780 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 16:37:56,780 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 16:37:56,780 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 16:37:56,781 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 16:37:56,781 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 16:37:56,781 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 16:37:56,781 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 16:37:56,782 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 16:37:56,782 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 16:37:56,782 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 16:37:56,782 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 16:37:56,783 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 16:37:56,783 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 16:37:56,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 16:37:56,783 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 16:37:56,783 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 16:37:56,784 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 16:37:56,784 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 16:37:57,289 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 16:37:57,311 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 16:37:57,316 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 16:37:57,318 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 16:37:57,319 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 16:37:57,320 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i [2020-09-04 16:37:57,412 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/536738b10/02d1211ff85e40a489ec7a1089fd7fcf/FLAGbd8af27c0 [2020-09-04 16:37:58,200 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 16:37:58,201 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i [2020-09-04 16:37:58,218 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/536738b10/02d1211ff85e40a489ec7a1089fd7fcf/FLAGbd8af27c0 [2020-09-04 16:37:58,379 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/536738b10/02d1211ff85e40a489ec7a1089fd7fcf [2020-09-04 16:37:58,394 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 16:37:58,397 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 16:37:58,398 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 16:37:58,398 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 16:37:58,403 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 16:37:58,405 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:37:58" (1/1) ... [2020-09-04 16:37:58,410 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e0386e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:37:58, skipping insertion in model container [2020-09-04 16:37:58,410 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:37:58" (1/1) ... [2020-09-04 16:37:58,421 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 16:37:58,502 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 16:37:59,083 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:37:59,096 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 16:37:59,168 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:37:59,227 INFO L208 MainTranslator]: Completed translation [2020-09-04 16:37:59,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:37:59 WrapperNode [2020-09-04 16:37:59,228 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 16:37:59,229 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 16:37:59,229 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 16:37:59,229 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 16:37:59,247 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:37:59" (1/1) ... [2020-09-04 16:37:59,247 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:37:59" (1/1) ... [2020-09-04 16:37:59,271 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:37:59" (1/1) ... [2020-09-04 16:37:59,272 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:37:59" (1/1) ... [2020-09-04 16:37:59,308 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:37:59" (1/1) ... [2020-09-04 16:37:59,319 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:37:59" (1/1) ... [2020-09-04 16:37:59,324 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:37:59" (1/1) ... [2020-09-04 16:37:59,333 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 16:37:59,334 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 16:37:59,334 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 16:37:59,336 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 16:37:59,337 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:37:59" (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 16:37:59,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 16:37:59,419 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 16:37:59,419 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-04 16:37:59,419 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-04 16:37:59,420 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-09-04 16:37:59,420 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_node [2020-09-04 16:37:59,420 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2020-09-04 16:37:59,420 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sll [2020-09-04 16:37:59,420 INFO L138 BoogieDeclarations]: Found implementation of procedure init_back_link [2020-09-04 16:37:59,420 INFO L138 BoogieDeclarations]: Found implementation of procedure reverse_dll [2020-09-04 16:37:59,420 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_fw_link [2020-09-04 16:37:59,421 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2020-09-04 16:37:59,421 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2020-09-04 16:37:59,421 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 16:37:59,421 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 16:37:59,422 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-04 16:37:59,422 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-04 16:37:59,422 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-04 16:37:59,423 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-04 16:37:59,423 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-04 16:37:59,424 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-04 16:37:59,424 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-04 16:37:59,426 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-04 16:37:59,427 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-04 16:37:59,427 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-04 16:37:59,427 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-04 16:37:59,427 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-04 16:37:59,428 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-04 16:37:59,428 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-04 16:37:59,428 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-04 16:37:59,428 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-04 16:37:59,429 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-04 16:37:59,429 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-04 16:37:59,430 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-04 16:37:59,430 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-04 16:37:59,430 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-04 16:37:59,431 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-04 16:37:59,431 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-04 16:37:59,431 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-04 16:37:59,431 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-04 16:37:59,431 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-04 16:37:59,431 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-04 16:37:59,431 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-04 16:37:59,432 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-04 16:37:59,432 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-04 16:37:59,432 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-04 16:37:59,432 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-04 16:37:59,432 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-04 16:37:59,432 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-04 16:37:59,432 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-04 16:37:59,432 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-04 16:37:59,433 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-04 16:37:59,433 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-04 16:37:59,433 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-04 16:37:59,433 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-04 16:37:59,433 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-04 16:37:59,433 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-04 16:37:59,433 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-04 16:37:59,433 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-04 16:37:59,433 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-04 16:37:59,434 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-04 16:37:59,434 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-04 16:37:59,434 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-04 16:37:59,434 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-04 16:37:59,434 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-04 16:37:59,434 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-04 16:37:59,434 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-04 16:37:59,435 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-04 16:37:59,435 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-04 16:37:59,435 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-04 16:37:59,435 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-04 16:37:59,435 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-04 16:37:59,435 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-04 16:37:59,435 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-04 16:37:59,435 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-04 16:37:59,435 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 16:37:59,436 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-04 16:37:59,436 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-04 16:37:59,436 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-04 16:37:59,436 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-04 16:37:59,436 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-04 16:37:59,436 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-04 16:37:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-04 16:37:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-04 16:37:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-04 16:37:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-04 16:37:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-04 16:37:59,437 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-04 16:37:59,438 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-04 16:37:59,438 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-04 16:37:59,438 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-04 16:37:59,438 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-04 16:37:59,438 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-04 16:37:59,438 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-04 16:37:59,439 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-04 16:37:59,439 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-04 16:37:59,439 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-04 16:37:59,439 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-04 16:37:59,439 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-04 16:37:59,439 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-04 16:37:59,439 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-04 16:37:59,440 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-04 16:37:59,440 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-04 16:37:59,440 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-04 16:37:59,440 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-04 16:37:59,440 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-04 16:37:59,440 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-04 16:37:59,440 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-04 16:37:59,441 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-04 16:37:59,441 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-04 16:37:59,441 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-04 16:37:59,441 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-04 16:37:59,441 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-04 16:37:59,441 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-04 16:37:59,441 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-04 16:37:59,442 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-04 16:37:59,442 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-04 16:37:59,442 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 16:37:59,442 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-09-04 16:37:59,442 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_node [2020-09-04 16:37:59,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-04 16:37:59,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-04 16:37:59,443 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2020-09-04 16:37:59,443 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-04 16:37:59,443 INFO L130 BoogieDeclarations]: Found specification of procedure create_sll [2020-09-04 16:37:59,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 16:37:59,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-09-04 16:37:59,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 16:37:59,444 INFO L130 BoogieDeclarations]: Found specification of procedure init_back_link [2020-09-04 16:37:59,444 INFO L130 BoogieDeclarations]: Found specification of procedure reverse_dll [2020-09-04 16:37:59,444 INFO L130 BoogieDeclarations]: Found specification of procedure remove_fw_link [2020-09-04 16:37:59,444 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2020-09-04 16:37:59,444 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2020-09-04 16:37:59,444 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 16:37:59,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 16:37:59,445 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 16:38:00,349 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 16:38:00,349 INFO L295 CfgBuilder]: Removed 33 assume(true) statements. [2020-09-04 16:38:00,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:38:00 BoogieIcfgContainer [2020-09-04 16:38:00,356 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 16:38:00,357 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 16:38:00,357 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 16:38:00,361 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 16:38:00,362 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 04:37:58" (1/3) ... [2020-09-04 16:38:00,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1157f6b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:38:00, skipping insertion in model container [2020-09-04 16:38:00,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:37:59" (2/3) ... [2020-09-04 16:38:00,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1157f6b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:38:00, skipping insertion in model container [2020-09-04 16:38:00,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:38:00" (3/3) ... [2020-09-04 16:38:00,366 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i [2020-09-04 16:38:00,403 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 16:38:00,414 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 16:38:00,438 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 16:38:00,466 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 16:38:00,466 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 16:38:00,466 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 16:38:00,466 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 16:38:00,466 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 16:38:00,467 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 16:38:00,467 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 16:38:00,467 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 16:38:00,489 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states. [2020-09-04 16:38:00,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-04 16:38:00,505 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:38:00,507 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:38:00,507 INFO L427 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:38:00,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:38:00,516 INFO L82 PathProgramCache]: Analyzing trace with hash 2069327278, now seen corresponding path program 1 times [2020-09-04 16:38:00,528 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:38:00,529 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957863948] [2020-09-04 16:38:00,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:38:00,620 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:38:00,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:00,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:38:00,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:00,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-04 16:38:00,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:00,837 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 16:38:00,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957863948] [2020-09-04 16:38:00,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:38:00,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 16:38:00,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060998268] [2020-09-04 16:38:00,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 16:38:00,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:38:00,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 16:38:00,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 16:38:00,877 INFO L87 Difference]: Start difference. First operand 208 states. Second operand 4 states. [2020-09-04 16:38:01,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:38:01,528 INFO L93 Difference]: Finished difference Result 423 states and 572 transitions. [2020-09-04 16:38:01,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 16:38:01,531 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-09-04 16:38:01,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:38:01,554 INFO L225 Difference]: With dead ends: 423 [2020-09-04 16:38:01,554 INFO L226 Difference]: Without dead ends: 211 [2020-09-04 16:38:01,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-04 16:38:01,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-09-04 16:38:01,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 188. [2020-09-04 16:38:01,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-09-04 16:38:01,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 208 transitions. [2020-09-04 16:38:01,673 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 208 transitions. Word has length 41 [2020-09-04 16:38:01,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:38:01,673 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 208 transitions. [2020-09-04 16:38:01,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 16:38:01,674 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 208 transitions. [2020-09-04 16:38:01,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-09-04 16:38:01,682 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:38:01,684 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:38:01,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 16:38:01,685 INFO L427 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:38:01,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:38:01,685 INFO L82 PathProgramCache]: Analyzing trace with hash 2121642840, now seen corresponding path program 1 times [2020-09-04 16:38:01,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:38:01,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1815519749] [2020-09-04 16:38:01,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:38:01,697 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:38:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:02,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:38:02,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:02,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-04 16:38:02,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:02,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 16:38:02,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:02,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-04 16:38:02,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:03,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-04 16:38:03,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:04,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-04 16:38:04,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:05,164 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 16:38:05,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1815519749] [2020-09-04 16:38:05,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:38:05,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2020-09-04 16:38:05,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003856716] [2020-09-04 16:38:05,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-04 16:38:05,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:38:05,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-04 16:38:05,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1036, Unknown=0, NotChecked=0, Total=1122 [2020-09-04 16:38:05,169 INFO L87 Difference]: Start difference. First operand 188 states and 208 transitions. Second operand 34 states. [2020-09-04 16:38:06,301 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2020-09-04 16:38:07,924 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-09-04 16:38:12,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:38:12,605 INFO L93 Difference]: Finished difference Result 263 states and 298 transitions. [2020-09-04 16:38:12,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-04 16:38:12,614 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 85 [2020-09-04 16:38:12,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:38:12,619 INFO L225 Difference]: With dead ends: 263 [2020-09-04 16:38:12,619 INFO L226 Difference]: Without dead ends: 260 [2020-09-04 16:38:12,623 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=248, Invalid=3058, Unknown=0, NotChecked=0, Total=3306 [2020-09-04 16:38:12,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-09-04 16:38:12,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 205. [2020-09-04 16:38:12,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-09-04 16:38:12,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 227 transitions. [2020-09-04 16:38:12,666 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 227 transitions. Word has length 85 [2020-09-04 16:38:12,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:38:12,666 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 227 transitions. [2020-09-04 16:38:12,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-04 16:38:12,667 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 227 transitions. [2020-09-04 16:38:12,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-09-04 16:38:12,670 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:38:12,670 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:38:12,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 16:38:12,671 INFO L427 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:38:12,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:38:12,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1210442558, now seen corresponding path program 1 times [2020-09-04 16:38:12,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:38:12,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855944193] [2020-09-04 16:38:12,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:38:12,676 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:38:12,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:12,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:38:12,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:12,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-04 16:38:12,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:13,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-04 16:38:13,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:13,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-04 16:38:13,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:13,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-04 16:38:13,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:15,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-09-04 16:38:15,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:38:15,709 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-04 16:38:15,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855944193] [2020-09-04 16:38:15,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:38:15,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2020-09-04 16:38:15,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737004830] [2020-09-04 16:38:15,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-04 16:38:15,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:38:15,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-04 16:38:15,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1041, Unknown=0, NotChecked=0, Total=1122 [2020-09-04 16:38:15,712 INFO L87 Difference]: Start difference. First operand 205 states and 227 transitions. Second operand 34 states. [2020-09-04 16:38:23,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:38:23,677 INFO L93 Difference]: Finished difference Result 273 states and 311 transitions. [2020-09-04 16:38:23,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-04 16:38:23,678 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 87 [2020-09-04 16:38:23,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:38:23,681 INFO L225 Difference]: With dead ends: 273 [2020-09-04 16:38:23,682 INFO L226 Difference]: Without dead ends: 270 [2020-09-04 16:38:23,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=283, Invalid=3499, Unknown=0, NotChecked=0, Total=3782 [2020-09-04 16:38:23,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-09-04 16:38:23,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 205. [2020-09-04 16:38:23,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-09-04 16:38:23,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 226 transitions. [2020-09-04 16:38:23,722 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 226 transitions. Word has length 87 [2020-09-04 16:38:23,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:38:23,723 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 226 transitions. [2020-09-04 16:38:23,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-04 16:38:23,723 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 226 transitions. [2020-09-04 16:38:23,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-09-04 16:38:23,725 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:38:23,726 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1] [2020-09-04 16:38:23,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 16:38:23,726 INFO L427 AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:38:23,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:38:23,727 INFO L82 PathProgramCache]: Analyzing trace with hash 2145368719, now seen corresponding path program 1 times [2020-09-04 16:38:23,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:38:23,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689411991] [2020-09-04 16:38:23,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:38:23,731 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:38:23,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:38:23,783 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:38:23,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:38:23,829 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:38:23,882 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 16:38:23,882 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 16:38:23,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 16:38:23,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 04:38:23 BoogieIcfgContainer [2020-09-04 16:38:23,916 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 16:38:23,920 INFO L168 Benchmark]: Toolchain (without parser) took 25523.07 ms. Allocated memory was 145.2 MB in the beginning and 429.4 MB in the end (delta: 284.2 MB). Free memory was 99.8 MB in the beginning and 254.2 MB in the end (delta: -154.4 MB). Peak memory consumption was 129.7 MB. Max. memory is 7.1 GB. [2020-09-04 16:38:23,923 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 145.2 MB. Free memory was 119.5 MB in the beginning and 119.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 16:38:23,924 INFO L168 Benchmark]: CACSL2BoogieTranslator took 830.30 ms. Allocated memory was 145.2 MB in the beginning and 202.9 MB in the end (delta: 57.7 MB). Free memory was 99.5 MB in the beginning and 166.9 MB in the end (delta: -67.3 MB). Peak memory consumption was 20.8 MB. Max. memory is 7.1 GB. [2020-09-04 16:38:23,927 INFO L168 Benchmark]: Boogie Preprocessor took 104.86 ms. Allocated memory is still 202.9 MB. Free memory was 166.9 MB in the beginning and 163.5 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. [2020-09-04 16:38:23,928 INFO L168 Benchmark]: RCFGBuilder took 1022.01 ms. Allocated memory is still 202.9 MB. Free memory was 163.5 MB in the beginning and 90.3 MB in the end (delta: 73.2 MB). Peak memory consumption was 73.2 MB. Max. memory is 7.1 GB. [2020-09-04 16:38:23,937 INFO L168 Benchmark]: TraceAbstraction took 23559.10 ms. Allocated memory was 202.9 MB in the beginning and 429.4 MB in the end (delta: 226.5 MB). Free memory was 90.3 MB in the beginning and 254.2 MB in the end (delta: -163.8 MB). Peak memory consumption was 62.6 MB. Max. memory is 7.1 GB. [2020-09-04 16:38:23,949 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 145.2 MB. Free memory was 119.5 MB in the beginning and 119.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 830.30 ms. Allocated memory was 145.2 MB in the beginning and 202.9 MB in the end (delta: 57.7 MB). Free memory was 99.5 MB in the beginning and 166.9 MB in the end (delta: -67.3 MB). Peak memory consumption was 20.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 104.86 ms. Allocated memory is still 202.9 MB. Free memory was 166.9 MB in the beginning and 163.5 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1022.01 ms. Allocated memory is still 202.9 MB. Free memory was 163.5 MB in the beginning and 90.3 MB in the end (delta: 73.2 MB). Peak memory consumption was 73.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 23559.10 ms. Allocated memory was 202.9 MB in the beginning and 429.4 MB in the end (delta: 226.5 MB). Free memory was 90.3 MB in the beginning and 254.2 MB in the end (delta: -163.8 MB). Peak memory consumption was 62.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 554]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L628] const struct node *p1, *p2; [L629] CALL, EXPR create_sll(&p1, &p2) [L577] struct node *list = ((void *)0); [L579] CALL chain_node(&list) [L571] CALL, EXPR alloc_node() [L562] struct node *ptr = malloc(sizeof *ptr); [L563] COND FALSE !(!ptr) [L565] ptr->next = ((void *)0) [L566] ptr->prev = ((void *)0) [L567] return ptr; [L571] RET, EXPR alloc_node() [L571] struct node *node = alloc_node(); [L572] EXPR \read(**ppnode) [L572] node->next = *ppnode [L573] *ppnode = node [L579] RET chain_node(&list) [L580] COND FALSE !(__VERIFIER_nondet_int()) [L581] EXPR \read(*list) [L581] *pp2 = list [L582] COND FALSE !(__VERIFIER_nondet_int()) [L584] EXPR \read(*list) [L584] *pp1 = list [L586] CALL chain_node(&list) [L571] CALL, EXPR alloc_node() [L562] struct node *ptr = malloc(sizeof *ptr); [L563] COND FALSE !(!ptr) [L565] ptr->next = ((void *)0) [L566] ptr->prev = ((void *)0) [L567] return ptr; [L571] RET, EXPR alloc_node() [L571] struct node *node = alloc_node(); [L572] EXPR \read(**ppnode) [L572] node->next = *ppnode [L573] *ppnode = node [L586] RET chain_node(&list) [L587] COND FALSE !(__VERIFIER_nondet_int()) [L588] EXPR \read(*list) [L588] return list; [L577] struct node *list = ((void *)0); [L588] return list; [L629] RET, EXPR create_sll(&p1, &p2) [L629] struct node *list = create_sll(&p1, &p2); [L631] EXPR \read(*p1) [L631] EXPR \read(*p2) [L631] CALL check_seq_next(p1, p2) [L615] COND FALSE !(!(beg)) [L616] COND FALSE !(!(end)) [L617] EXPR beg->next [L617] beg = beg->next [L617] COND TRUE end != beg [L618] COND TRUE !(beg) [L618] CALL fail() [L554] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 14 procedures, 218 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 23.4s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 16.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 526 SDtfs, 1037 SDslu, 3142 SDs, 0 SdLazy, 7959 SolverSat, 324 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 8.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 145 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1062 ImplicationChecksByTransitivity, 9.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=208occurred 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: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 143 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...