/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 0.1.25-267fbe0 [2020-07-17 13:24:49,009 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 13:24:49,012 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 13:24:49,033 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 13:24:49,033 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 13:24:49,035 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 13:24:49,037 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 13:24:49,046 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 13:24:49,050 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 13:24:49,052 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 13:24:49,054 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 13:24:49,056 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 13:24:49,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 13:24:49,058 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 13:24:49,060 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 13:24:49,062 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 13:24:49,063 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 13:24:49,065 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 13:24:49,067 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 13:24:49,072 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 13:24:49,077 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 13:24:49,080 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 13:24:49,081 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 13:24:49,082 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 13:24:49,085 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-17 13:24:49,085 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-17 13:24:49,085 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-17 13:24:49,088 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-17 13:24:49,088 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-17 13:24:49,089 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-17 13:24:49,089 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-17 13:24:49,090 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-17 13:24:49,091 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-17 13:24:49,092 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-17 13:24:49,093 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-17 13:24:49,093 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-17 13:24:49,094 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-17 13:24:49,094 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-17 13:24:49,094 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 13:24:49,095 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 13:24:49,096 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 13:24:49,097 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 13:24:49,125 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 13:24:49,125 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 13:24:49,126 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 13:24:49,127 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 13:24:49,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 13:24:49,127 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 13:24:49,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 13:24:49,132 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 13:24:49,133 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 13:24:49,133 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 13:24:49,133 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 13:24:49,133 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 13:24:49,133 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 13:24:49,133 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 13:24:49,134 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 13:24:49,134 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 13:24:49,134 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 13:24:49,134 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 13:24:49,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 13:24:49,135 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 13:24:49,135 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 13:24:49,135 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 13:24:49,138 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-17 13:24:49,418 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 13:24:49,430 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 13:24:49,434 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 13:24:49,435 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 13:24:49,436 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 13:24:49,436 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i [2020-07-17 13:24:49,517 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21f9b8d89/bc02443c1c2e42a4a4acbadb67b9a54e/FLAG75dfb29f0 [2020-07-17 13:24:50,032 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 13:24:50,032 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/sll_to_dll_rev-1.i [2020-07-17 13:24:50,046 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21f9b8d89/bc02443c1c2e42a4a4acbadb67b9a54e/FLAG75dfb29f0 [2020-07-17 13:24:50,350 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/21f9b8d89/bc02443c1c2e42a4a4acbadb67b9a54e [2020-07-17 13:24:50,359 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 13:24:50,362 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 13:24:50,363 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 13:24:50,363 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 13:24:50,366 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 13:24:50,367 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 01:24:50" (1/1) ... [2020-07-17 13:24:50,370 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61e8532 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:24:50, skipping insertion in model container [2020-07-17 13:24:50,370 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 01:24:50" (1/1) ... [2020-07-17 13:24:50,377 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 13:24:50,415 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 13:24:50,860 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 13:24:50,868 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 13:24:50,940 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 13:24:51,010 INFO L208 MainTranslator]: Completed translation [2020-07-17 13:24:51,010 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:24:51 WrapperNode [2020-07-17 13:24:51,010 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 13:24:51,011 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 13:24:51,012 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 13:24:51,012 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 13:24:51,024 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:24:51" (1/1) ... [2020-07-17 13:24:51,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:24:51" (1/1) ... [2020-07-17 13:24:51,041 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:24:51" (1/1) ... [2020-07-17 13:24:51,042 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:24:51" (1/1) ... [2020-07-17 13:24:51,065 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:24:51" (1/1) ... [2020-07-17 13:24:51,077 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:24:51" (1/1) ... [2020-07-17 13:24:51,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:24:51" (1/1) ... [2020-07-17 13:24:51,092 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 13:24:51,093 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 13:24:51,093 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 13:24:51,093 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 13:24:51,098 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:24:51" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 13:24:51,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 13:24:51,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 13:24:51,154 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-07-17 13:24:51,154 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-07-17 13:24:51,154 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-07-17 13:24:51,154 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_node [2020-07-17 13:24:51,154 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2020-07-17 13:24:51,154 INFO L138 BoogieDeclarations]: Found implementation of procedure create_sll [2020-07-17 13:24:51,155 INFO L138 BoogieDeclarations]: Found implementation of procedure init_back_link [2020-07-17 13:24:51,155 INFO L138 BoogieDeclarations]: Found implementation of procedure reverse_dll [2020-07-17 13:24:51,155 INFO L138 BoogieDeclarations]: Found implementation of procedure remove_fw_link [2020-07-17 13:24:51,155 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2020-07-17 13:24:51,155 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2020-07-17 13:24:51,155 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 13:24:51,156 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 13:24:51,156 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-07-17 13:24:51,156 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-07-17 13:24:51,156 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-07-17 13:24:51,156 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-07-17 13:24:51,156 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-07-17 13:24:51,157 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-07-17 13:24:51,157 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-07-17 13:24:51,157 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-07-17 13:24:51,157 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-07-17 13:24:51,157 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-07-17 13:24:51,157 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-07-17 13:24:51,158 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-07-17 13:24:51,158 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-07-17 13:24:51,158 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-07-17 13:24:51,158 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-07-17 13:24:51,158 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-07-17 13:24:51,158 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-07-17 13:24:51,159 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-07-17 13:24:51,159 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-07-17 13:24:51,159 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-07-17 13:24:51,159 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-07-17 13:24:51,159 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-07-17 13:24:51,159 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-07-17 13:24:51,159 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-07-17 13:24:51,160 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-07-17 13:24:51,160 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-07-17 13:24:51,160 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-07-17 13:24:51,160 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-07-17 13:24:51,160 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-07-17 13:24:51,160 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-07-17 13:24:51,160 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-07-17 13:24:51,160 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-07-17 13:24:51,160 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-07-17 13:24:51,161 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-07-17 13:24:51,161 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-07-17 13:24:51,161 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-07-17 13:24:51,161 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-07-17 13:24:51,161 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-07-17 13:24:51,161 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-07-17 13:24:51,161 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-07-17 13:24:51,162 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-07-17 13:24:51,162 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-07-17 13:24:51,162 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-07-17 13:24:51,162 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-07-17 13:24:51,162 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-07-17 13:24:51,162 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-07-17 13:24:51,162 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-07-17 13:24:51,162 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-07-17 13:24:51,163 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-07-17 13:24:51,163 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-07-17 13:24:51,163 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-07-17 13:24:51,163 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-07-17 13:24:51,163 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-17 13:24:51,163 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-17 13:24:51,163 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-07-17 13:24:51,163 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-17 13:24:51,163 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-07-17 13:24:51,163 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-07-17 13:24:51,164 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-07-17 13:24:51,164 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-07-17 13:24:51,164 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-17 13:24:51,164 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-07-17 13:24:51,164 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-07-17 13:24:51,164 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-07-17 13:24:51,165 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-07-17 13:24:51,165 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-07-17 13:24:51,165 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-07-17 13:24:51,165 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-07-17 13:24:51,165 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-07-17 13:24:51,165 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-07-17 13:24:51,166 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-07-17 13:24:51,166 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-07-17 13:24:51,166 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-07-17 13:24:51,166 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-07-17 13:24:51,166 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-07-17 13:24:51,166 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-07-17 13:24:51,166 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-07-17 13:24:51,167 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-07-17 13:24:51,167 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-07-17 13:24:51,167 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-07-17 13:24:51,167 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-07-17 13:24:51,167 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-07-17 13:24:51,167 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-07-17 13:24:51,167 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-07-17 13:24:51,168 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-07-17 13:24:51,168 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-07-17 13:24:51,168 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-07-17 13:24:51,168 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-07-17 13:24:51,168 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-07-17 13:24:51,168 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-07-17 13:24:51,168 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-07-17 13:24:51,169 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-07-17 13:24:51,169 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-07-17 13:24:51,169 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-07-17 13:24:51,169 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-07-17 13:24:51,169 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-07-17 13:24:51,169 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-07-17 13:24:51,169 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-07-17 13:24:51,170 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-07-17 13:24:51,170 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-07-17 13:24:51,170 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-07-17 13:24:51,170 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-07-17 13:24:51,170 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 13:24:51,170 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-07-17 13:24:51,170 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_node [2020-07-17 13:24:51,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-17 13:24:51,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-17 13:24:51,171 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2020-07-17 13:24:51,171 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-17 13:24:51,171 INFO L130 BoogieDeclarations]: Found specification of procedure create_sll [2020-07-17 13:24:51,171 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-17 13:24:51,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-07-17 13:24:51,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-17 13:24:51,172 INFO L130 BoogieDeclarations]: Found specification of procedure init_back_link [2020-07-17 13:24:51,172 INFO L130 BoogieDeclarations]: Found specification of procedure reverse_dll [2020-07-17 13:24:51,172 INFO L130 BoogieDeclarations]: Found specification of procedure remove_fw_link [2020-07-17 13:24:51,172 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2020-07-17 13:24:51,172 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2020-07-17 13:24:51,172 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 13:24:51,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 13:24:51,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 13:24:51,918 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 13:24:51,919 INFO L295 CfgBuilder]: Removed 33 assume(true) statements. [2020-07-17 13:24:51,924 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 01:24:51 BoogieIcfgContainer [2020-07-17 13:24:51,925 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 13:24:51,926 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 13:24:51,926 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 13:24:51,929 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 13:24:51,930 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 01:24:50" (1/3) ... [2020-07-17 13:24:51,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25348ed5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 01:24:51, skipping insertion in model container [2020-07-17 13:24:51,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 01:24:51" (2/3) ... [2020-07-17 13:24:51,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25348ed5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 01:24:51, skipping insertion in model container [2020-07-17 13:24:51,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 01:24:51" (3/3) ... [2020-07-17 13:24:51,933 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i [2020-07-17 13:24:51,944 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 13:24:51,953 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 13:24:51,968 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 13:24:52,017 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 13:24:52,018 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 13:24:52,019 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-17 13:24:52,019 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 13:24:52,019 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 13:24:52,020 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 13:24:52,020 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 13:24:52,020 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 13:24:52,046 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states. [2020-07-17 13:24:52,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-17 13:24:52,065 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 13:24:52,066 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] [2020-07-17 13:24:52,066 INFO L427 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 13:24:52,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 13:24:52,074 INFO L82 PathProgramCache]: Analyzing trace with hash 2069327278, now seen corresponding path program 1 times [2020-07-17 13:24:52,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 13:24:52,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773368739] [2020-07-17 13:24:52,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 13:24:52,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:24:52,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:24:52,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:24:52,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 13:24:52,359 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 13:24:52,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773368739] [2020-07-17 13:24:52,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 13:24:52,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-17 13:24:52,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261419528] [2020-07-17 13:24:52,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-17 13:24:52,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 13:24:52,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-17 13:24:52,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-07-17 13:24:52,387 INFO L87 Difference]: Start difference. First operand 208 states. Second operand 4 states. [2020-07-17 13:24:52,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 13:24:52,883 INFO L93 Difference]: Finished difference Result 423 states and 572 transitions. [2020-07-17 13:24:52,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 13:24:52,886 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-07-17 13:24:52,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 13:24:52,901 INFO L225 Difference]: With dead ends: 423 [2020-07-17 13:24:52,901 INFO L226 Difference]: Without dead ends: 211 [2020-07-17 13:24:52,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-07-17 13:24:52,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-07-17 13:24:52,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 188. [2020-07-17 13:24:52,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-07-17 13:24:52,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 208 transitions. [2020-07-17 13:24:52,987 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 208 transitions. Word has length 41 [2020-07-17 13:24:52,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 13:24:52,987 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 208 transitions. [2020-07-17 13:24:52,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-17 13:24:52,988 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 208 transitions. [2020-07-17 13:24:52,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-17 13:24:52,995 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 13:24:52,995 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] [2020-07-17 13:24:52,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 13:24:52,996 INFO L427 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 13:24:52,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 13:24:52,998 INFO L82 PathProgramCache]: Analyzing trace with hash 2121642840, now seen corresponding path program 1 times [2020-07-17 13:24:52,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 13:24:52,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88751810] [2020-07-17 13:24:52,998 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 13:24:53,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:24:53,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:24:53,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:24:53,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:24:54,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:24:54,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:24:55,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:24:55,685 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-17 13:24:55,686 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 13:24:55,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88751810] [2020-07-17 13:24:55,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 13:24:55,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2020-07-17 13:24:55,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453507677] [2020-07-17 13:24:55,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-17 13:24:55,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 13:24:55,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-17 13:24:55,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1036, Unknown=0, NotChecked=0, Total=1122 [2020-07-17 13:24:55,693 INFO L87 Difference]: Start difference. First operand 188 states and 208 transitions. Second operand 34 states. [2020-07-17 13:25:01,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 13:25:01,487 INFO L93 Difference]: Finished difference Result 263 states and 298 transitions. [2020-07-17 13:25:01,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-07-17 13:25:01,494 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 85 [2020-07-17 13:25:01,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 13:25:01,498 INFO L225 Difference]: With dead ends: 263 [2020-07-17 13:25:01,498 INFO L226 Difference]: Without dead ends: 260 [2020-07-17 13:25:01,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=248, Invalid=3058, Unknown=0, NotChecked=0, Total=3306 [2020-07-17 13:25:01,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-07-17 13:25:01,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 205. [2020-07-17 13:25:01,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-07-17 13:25:01,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 227 transitions. [2020-07-17 13:25:01,567 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 227 transitions. Word has length 85 [2020-07-17 13:25:01,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 13:25:01,568 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 227 transitions. [2020-07-17 13:25:01,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-17 13:25:01,568 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 227 transitions. [2020-07-17 13:25:01,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-07-17 13:25:01,579 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 13:25:01,579 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] [2020-07-17 13:25:01,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 13:25:01,580 INFO L427 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 13:25:01,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 13:25:01,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1210442558, now seen corresponding path program 1 times [2020-07-17 13:25:01,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 13:25:01,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571498089] [2020-07-17 13:25:01,581 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 13:25:01,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:25:01,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:25:01,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:25:02,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:25:02,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:25:02,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:25:03,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 13:25:03,539 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-17 13:25:03,540 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 13:25:03,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571498089] [2020-07-17 13:25:03,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 13:25:03,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2020-07-17 13:25:03,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526051245] [2020-07-17 13:25:03,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-07-17 13:25:03,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 13:25:03,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-07-17 13:25:03,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1041, Unknown=0, NotChecked=0, Total=1122 [2020-07-17 13:25:03,543 INFO L87 Difference]: Start difference. First operand 205 states and 227 transitions. Second operand 34 states. [2020-07-17 13:25:10,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 13:25:10,058 INFO L93 Difference]: Finished difference Result 271 states and 308 transitions. [2020-07-17 13:25:10,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-07-17 13:25:10,061 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 87 [2020-07-17 13:25:10,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 13:25:10,065 INFO L225 Difference]: With dead ends: 271 [2020-07-17 13:25:10,065 INFO L226 Difference]: Without dead ends: 268 [2020-07-17 13:25:10,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=265, Invalid=3275, Unknown=0, NotChecked=0, Total=3540 [2020-07-17 13:25:10,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-07-17 13:25:10,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 205. [2020-07-17 13:25:10,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2020-07-17 13:25:10,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 226 transitions. [2020-07-17 13:25:10,099 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 226 transitions. Word has length 87 [2020-07-17 13:25:10,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 13:25:10,099 INFO L479 AbstractCegarLoop]: Abstraction has 205 states and 226 transitions. [2020-07-17 13:25:10,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-07-17 13:25:10,100 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 226 transitions. [2020-07-17 13:25:10,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-07-17 13:25:10,101 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 13:25:10,101 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] [2020-07-17 13:25:10,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 13:25:10,102 INFO L427 AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 13:25:10,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 13:25:10,102 INFO L82 PathProgramCache]: Analyzing trace with hash 2145368719, now seen corresponding path program 1 times [2020-07-17 13:25:10,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 13:25:10,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893228220] [2020-07-17 13:25:10,103 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 13:25:10,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 13:25:10,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 13:25:10,205 INFO L192 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-17 13:25:10,206 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-17 13:25:10,206 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 13:25:10,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-17 13:25:10,229 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 01:25:10 BoogieIcfgContainer [2020-07-17 13:25:10,229 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 13:25:10,232 INFO L168 Benchmark]: Toolchain (without parser) took 19870.70 ms. Allocated memory was 144.2 MB in the beginning and 421.0 MB in the end (delta: 276.8 MB). Free memory was 99.0 MB in the beginning and 219.3 MB in the end (delta: -120.3 MB). Peak memory consumption was 156.6 MB. Max. memory is 7.1 GB. [2020-07-17 13:25:10,232 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 144.2 MB. Free memory was 119.6 MB in the beginning and 119.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-17 13:25:10,233 INFO L168 Benchmark]: CACSL2BoogieTranslator took 648.27 ms. Allocated memory was 144.2 MB in the beginning and 202.9 MB in the end (delta: 58.7 MB). Free memory was 98.6 MB in the beginning and 167.4 MB in the end (delta: -68.8 MB). Peak memory consumption was 21.9 MB. Max. memory is 7.1 GB. [2020-07-17 13:25:10,234 INFO L168 Benchmark]: Boogie Preprocessor took 81.07 ms. Allocated memory is still 202.9 MB. Free memory was 167.4 MB in the beginning and 164.1 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. [2020-07-17 13:25:10,235 INFO L168 Benchmark]: RCFGBuilder took 832.06 ms. Allocated memory is still 202.9 MB. Free memory was 164.1 MB in the beginning and 91.3 MB in the end (delta: 72.8 MB). Peak memory consumption was 72.8 MB. Max. memory is 7.1 GB. [2020-07-17 13:25:10,236 INFO L168 Benchmark]: TraceAbstraction took 18303.01 ms. Allocated memory was 202.9 MB in the beginning and 421.0 MB in the end (delta: 218.1 MB). Free memory was 90.6 MB in the beginning and 219.3 MB in the end (delta: -128.7 MB). Peak memory consumption was 89.4 MB. Max. memory is 7.1 GB. [2020-07-17 13:25:10,239 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 144.2 MB. Free memory was 119.6 MB in the beginning and 119.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 648.27 ms. Allocated memory was 144.2 MB in the beginning and 202.9 MB in the end (delta: 58.7 MB). Free memory was 98.6 MB in the beginning and 167.4 MB in the end (delta: -68.8 MB). Peak memory consumption was 21.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 81.07 ms. Allocated memory is still 202.9 MB. Free memory was 167.4 MB in the beginning and 164.1 MB in the end (delta: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 832.06 ms. Allocated memory is still 202.9 MB. Free memory was 164.1 MB in the beginning and 91.3 MB in the end (delta: 72.8 MB). Peak memory consumption was 72.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 18303.01 ms. Allocated memory was 202.9 MB in the beginning and 421.0 MB in the end (delta: 218.1 MB). Free memory was 90.6 MB in the beginning and 219.3 MB in the end (delta: -128.7 MB). Peak memory consumption was 89.4 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: 18.1s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 12.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 530 SDtfs, 1036 SDslu, 3212 SDs, 0 SdLazy, 7928 SolverSat, 315 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 172 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 7.2s 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, 141 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...