/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-circular-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 16:13:18,001 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 16:13:18,004 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 16:13:18,040 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 16:13:18,040 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 16:13:18,042 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 16:13:18,044 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 16:13:18,046 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 16:13:18,049 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 16:13:18,050 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 16:13:18,051 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 16:13:18,053 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 16:13:18,054 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 16:13:18,055 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 16:13:18,057 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 16:13:18,058 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 16:13:18,069 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 16:13:18,071 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 16:13:18,073 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 16:13:18,075 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 16:13:18,077 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 16:13:18,080 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 16:13:18,082 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 16:13:18,083 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 16:13:18,086 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-21 16:13:18,087 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-21 16:13:18,087 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-21 16:13:18,088 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-21 16:13:18,089 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-21 16:13:18,090 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-21 16:13:18,090 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-21 16:13:18,091 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-21 16:13:18,092 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-21 16:13:18,093 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-21 16:13:18,095 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-21 16:13:18,095 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-21 16:13:18,096 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-21 16:13:18,097 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-21 16:13:18,097 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 16:13:18,098 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 16:13:18,099 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 16:13:18,101 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-02-21 16:13:18,129 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 16:13:18,129 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 16:13:18,130 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-21 16:13:18,131 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-21 16:13:18,131 INFO L138 SettingsManager]: * Use SBE=true [2021-02-21 16:13:18,131 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 16:13:18,132 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 16:13:18,132 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 16:13:18,132 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 16:13:18,132 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 16:13:18,133 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 16:13:18,133 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 16:13:18,133 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 16:13:18,133 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 16:13:18,134 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 16:13:18,134 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 16:13:18,134 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 16:13:18,135 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 16:13:18,135 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-21 16:13:18,135 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 16:13:18,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 16:13:18,136 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 16:13:18,136 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-21 16:13:18,136 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-21 16:13:18,137 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-21 16:13:18,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-21 16:13:18,137 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 16:13:18,137 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-21 16:13:18,138 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 16:13:18,530 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 16:13:18,554 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 16:13:18,557 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 16:13:18,559 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 16:13:18,560 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 16:13:18,561 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-circular-1.i [2021-02-21 16:13:18,653 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/535789c86/69c578d56b354ff796cc8dec976cc2c2/FLAGe056a1c12 [2021-02-21 16:13:19,395 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 16:13:19,395 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-circular-1.i [2021-02-21 16:13:19,415 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/535789c86/69c578d56b354ff796cc8dec976cc2c2/FLAGe056a1c12 [2021-02-21 16:13:19,441 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/535789c86/69c578d56b354ff796cc8dec976cc2c2 [2021-02-21 16:13:19,449 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 16:13:19,465 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 16:13:19,467 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 16:13:19,468 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 16:13:19,472 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 16:13:19,473 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:13:19" (1/1) ... [2021-02-21 16:13:19,474 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35b8960c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:13:19, skipping insertion in model container [2021-02-21 16:13:19,474 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:13:19" (1/1) ... [2021-02-21 16:13:19,485 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 16:13:19,526 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 16:13:19,819 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-circular-1.i[22365,22378] [2021-02-21 16:13:19,825 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-circular-1.i[22471,22484] [2021-02-21 16:13:19,828 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-circular-1.i[22595,22608] [2021-02-21 16:13:19,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:13:19,842 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 16:13:19,884 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-circular-1.i[22365,22378] [2021-02-21 16:13:19,885 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-circular-1.i[22471,22484] [2021-02-21 16:13:19,887 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-circular-1.i[22595,22608] [2021-02-21 16:13:19,890 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:13:19,952 INFO L208 MainTranslator]: Completed translation [2021-02-21 16:13:19,952 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:13:19 WrapperNode [2021-02-21 16:13:19,952 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 16:13:19,954 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 16:13:19,954 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 16:13:19,954 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 16:13:19,968 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:13:19" (1/1) ... [2021-02-21 16:13:19,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:13:19" (1/1) ... [2021-02-21 16:13:19,984 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:13:19" (1/1) ... [2021-02-21 16:13:19,984 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:13:19" (1/1) ... [2021-02-21 16:13:20,001 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:13:19" (1/1) ... [2021-02-21 16:13:20,007 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:13:19" (1/1) ... [2021-02-21 16:13:20,011 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:13:19" (1/1) ... [2021-02-21 16:13:20,036 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 16:13:20,041 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 16:13:20,041 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 16:13:20,042 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 16:13:20,044 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:13:19" (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 [2021-02-21 16:13:20,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 16:13:20,156 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 16:13:20,156 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 16:13:20,156 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 16:13:20,156 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-02-21 16:13:20,157 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-02-21 16:13:20,157 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-02-21 16:13:20,157 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-02-21 16:13:20,157 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-02-21 16:13:20,157 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-02-21 16:13:20,158 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-02-21 16:13:20,158 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-02-21 16:13:20,158 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-02-21 16:13:20,158 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-02-21 16:13:20,158 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-02-21 16:13:20,158 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-02-21 16:13:20,159 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-02-21 16:13:20,159 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-02-21 16:13:20,159 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-02-21 16:13:20,159 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-02-21 16:13:20,159 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-02-21 16:13:20,159 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-02-21 16:13:20,160 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-02-21 16:13:20,160 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-02-21 16:13:20,160 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-02-21 16:13:20,160 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-02-21 16:13:20,160 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-02-21 16:13:20,161 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-02-21 16:13:20,161 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-02-21 16:13:20,161 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-02-21 16:13:20,161 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-02-21 16:13:20,161 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-02-21 16:13:20,161 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-02-21 16:13:20,162 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-02-21 16:13:20,162 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-02-21 16:13:20,162 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-02-21 16:13:20,162 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-02-21 16:13:20,162 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-02-21 16:13:20,162 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-02-21 16:13:20,163 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-02-21 16:13:20,163 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-02-21 16:13:20,163 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-02-21 16:13:20,163 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-02-21 16:13:20,163 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-02-21 16:13:20,163 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-02-21 16:13:20,164 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-02-21 16:13:20,164 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-02-21 16:13:20,164 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-02-21 16:13:20,164 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-02-21 16:13:20,164 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-02-21 16:13:20,164 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-02-21 16:13:20,164 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-02-21 16:13:20,165 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-02-21 16:13:20,165 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-02-21 16:13:20,165 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-02-21 16:13:20,165 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-02-21 16:13:20,165 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-02-21 16:13:20,165 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-02-21 16:13:20,166 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-02-21 16:13:20,166 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-02-21 16:13:20,166 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-02-21 16:13:20,166 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-02-21 16:13:20,166 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-02-21 16:13:20,166 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 16:13:20,167 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-02-21 16:13:20,167 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-02-21 16:13:20,167 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-02-21 16:13:20,167 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-02-21 16:13:20,167 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-02-21 16:13:20,167 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-02-21 16:13:20,168 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-02-21 16:13:20,168 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-02-21 16:13:20,168 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-02-21 16:13:20,168 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-02-21 16:13:20,168 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-02-21 16:13:20,168 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-02-21 16:13:20,169 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-02-21 16:13:20,169 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-02-21 16:13:20,169 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-02-21 16:13:20,169 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-02-21 16:13:20,169 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-02-21 16:13:20,169 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-02-21 16:13:20,170 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-02-21 16:13:20,170 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-02-21 16:13:20,170 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-02-21 16:13:20,170 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-02-21 16:13:20,170 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-02-21 16:13:20,170 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-02-21 16:13:20,170 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-02-21 16:13:20,171 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-02-21 16:13:20,171 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-02-21 16:13:20,171 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-02-21 16:13:20,171 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-02-21 16:13:20,171 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-02-21 16:13:20,171 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-02-21 16:13:20,172 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-02-21 16:13:20,172 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-02-21 16:13:20,172 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-02-21 16:13:20,172 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-02-21 16:13:20,172 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-02-21 16:13:20,172 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-02-21 16:13:20,173 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-02-21 16:13:20,173 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-02-21 16:13:20,173 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-02-21 16:13:20,173 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-02-21 16:13:20,173 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-02-21 16:13:20,173 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-02-21 16:13:20,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-02-21 16:13:20,174 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 16:13:20,174 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-02-21 16:13:20,174 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-02-21 16:13:20,174 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 16:13:20,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 16:13:20,174 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 16:13:20,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-02-21 16:13:20,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-02-21 16:13:20,175 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 16:13:20,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-02-21 16:13:20,175 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 16:13:20,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 16:13:20,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 16:13:20,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 16:13:20,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 16:13:20,930 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 16:13:20,930 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2021-02-21 16:13:20,932 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:13:20 BoogieIcfgContainer [2021-02-21 16:13:20,933 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 16:13:20,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 16:13:20,935 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 16:13:20,939 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 16:13:20,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 04:13:19" (1/3) ... [2021-02-21 16:13:20,940 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5626e164 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:13:20, skipping insertion in model container [2021-02-21 16:13:20,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:13:19" (2/3) ... [2021-02-21 16:13:20,941 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5626e164 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:13:20, skipping insertion in model container [2021-02-21 16:13:20,941 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:13:20" (3/3) ... [2021-02-21 16:13:20,943 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-circular-1.i [2021-02-21 16:13:20,951 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-21 16:13:20,957 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2021-02-21 16:13:20,978 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-02-21 16:13:21,006 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 16:13:21,006 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 16:13:21,007 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-21 16:13:21,007 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 16:13:21,007 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 16:13:21,007 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 16:13:21,007 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 16:13:21,008 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 16:13:21,026 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2021-02-21 16:13:21,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-02-21 16:13:21,032 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:13:21,033 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:13:21,034 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:13:21,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:13:21,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1187458044, now seen corresponding path program 1 times [2021-02-21 16:13:21,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:13:21,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253663699] [2021-02-21 16:13:21,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:13:21,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:13:21,240 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:13:21,242 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:13:21,243 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:13:21,244 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:13:21,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:13:21,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:13:21,331 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:13:21,332 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:13:21,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:13:21,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253663699] [2021-02-21 16:13:21,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:13:21,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-21 16:13:21,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876673088] [2021-02-21 16:13:21,343 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-21 16:13:21,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:13:21,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-21 16:13:21,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 16:13:21,361 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2021-02-21 16:13:21,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:13:21,474 INFO L93 Difference]: Finished difference Result 70 states and 106 transitions. [2021-02-21 16:13:21,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-21 16:13:21,476 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2021-02-21 16:13:21,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:13:21,486 INFO L225 Difference]: With dead ends: 70 [2021-02-21 16:13:21,487 INFO L226 Difference]: Without dead ends: 30 [2021-02-21 16:13:21,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 16:13:21,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-02-21 16:13:21,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-02-21 16:13:21,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2021-02-21 16:13:21,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-02-21 16:13:21,534 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 10 [2021-02-21 16:13:21,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:13:21,535 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-02-21 16:13:21,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-21 16:13:21,535 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-02-21 16:13:21,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-02-21 16:13:21,536 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:13:21,536 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:13:21,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 16:13:21,537 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:13:21,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:13:21,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1802537944, now seen corresponding path program 1 times [2021-02-21 16:13:21,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:13:21,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69987990] [2021-02-21 16:13:21,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:13:21,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:13:21,707 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:13:21,708 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:13:21,727 WARN L141 QuantifierPusher]: treesize reduction 31, result has 50.8 percent of original size [2021-02-21 16:13:21,732 WARN L147 QuantifierPusher]: treesize reduction 31, result has 50.8 percent of original size 32 [2021-02-21 16:13:21,775 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:13:21,776 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-02-21 16:13:21,781 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:13:21,782 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:13:21,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:13:21,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:13:21,836 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:13:21,839 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:13:21,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:13:21,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69987990] [2021-02-21 16:13:21,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:13:21,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 16:13:21,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661768441] [2021-02-21 16:13:21,843 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 16:13:21,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:13:21,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 16:13:21,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:13:21,847 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 5 states. [2021-02-21 16:13:21,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:13:21,988 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2021-02-21 16:13:21,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 16:13:21,989 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2021-02-21 16:13:21,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:13:21,990 INFO L225 Difference]: With dead ends: 46 [2021-02-21 16:13:21,991 INFO L226 Difference]: Without dead ends: 42 [2021-02-21 16:13:21,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:13:21,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-02-21 16:13:21,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 32. [2021-02-21 16:13:21,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2021-02-21 16:13:22,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2021-02-21 16:13:22,000 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 11 [2021-02-21 16:13:22,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:13:22,001 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2021-02-21 16:13:22,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 16:13:22,001 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2021-02-21 16:13:22,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-02-21 16:13:22,003 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:13:22,003 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:13:22,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 16:13:22,004 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:13:22,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:13:22,004 INFO L82 PathProgramCache]: Analyzing trace with hash 111468679, now seen corresponding path program 1 times [2021-02-21 16:13:22,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:13:22,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796496421] [2021-02-21 16:13:22,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:13:22,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:13:22,085 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:13:22,087 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:13:22,088 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:13:22,089 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:13:22,092 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:13:22,093 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:13:22,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:13:22,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:13:22,126 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:13:22,127 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:13:22,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:13:22,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796496421] [2021-02-21 16:13:22,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:13:22,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:13:22,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517513485] [2021-02-21 16:13:22,130 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:13:22,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:13:22,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:13:22,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:13:22,137 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 4 states. [2021-02-21 16:13:22,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:13:22,245 INFO L93 Difference]: Finished difference Result 75 states and 90 transitions. [2021-02-21 16:13:22,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:13:22,246 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2021-02-21 16:13:22,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:13:22,255 INFO L225 Difference]: With dead ends: 75 [2021-02-21 16:13:22,255 INFO L226 Difference]: Without dead ends: 53 [2021-02-21 16:13:22,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:13:22,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-02-21 16:13:22,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2021-02-21 16:13:22,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2021-02-21 16:13:22,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2021-02-21 16:13:22,267 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 14 [2021-02-21 16:13:22,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:13:22,267 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2021-02-21 16:13:22,267 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:13:22,268 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2021-02-21 16:13:22,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-21 16:13:22,268 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:13:22,269 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:13:22,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 16:13:22,269 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr2ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:13:22,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:13:22,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1556962980, now seen corresponding path program 1 times [2021-02-21 16:13:22,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:13:22,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505597307] [2021-02-21 16:13:22,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:13:22,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 16:13:22,297 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 16:13:22,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 16:13:22,320 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 16:13:22,349 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-02-21 16:13:22,349 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 16:13:22,350 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 16:13:22,383 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 04:13:22 BoogieIcfgContainer [2021-02-21 16:13:22,383 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 16:13:22,385 INFO L168 Benchmark]: Toolchain (without parser) took 2931.37 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 126.3 MB in the beginning and 89.1 MB in the end (delta: 37.2 MB). Peak memory consumption was 69.6 MB. Max. memory is 8.0 GB. [2021-02-21 16:13:22,385 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 153.1 MB. Free memory is still 125.7 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 16:13:22,386 INFO L168 Benchmark]: CACSL2BoogieTranslator took 485.46 ms. Allocated memory is still 153.1 MB. Free memory was 125.0 MB in the beginning and 102.9 MB in the end (delta: 22.1 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2021-02-21 16:13:22,387 INFO L168 Benchmark]: Boogie Preprocessor took 82.60 ms. Allocated memory is still 153.1 MB. Free memory was 102.9 MB in the beginning and 135.0 MB in the end (delta: -32.1 MB). Peak memory consumption was 6.6 MB. Max. memory is 8.0 GB. [2021-02-21 16:13:22,388 INFO L168 Benchmark]: RCFGBuilder took 891.68 ms. Allocated memory is still 153.1 MB. Free memory was 135.0 MB in the beginning and 92.3 MB in the end (delta: 42.7 MB). Peak memory consumption was 43.0 MB. Max. memory is 8.0 GB. [2021-02-21 16:13:22,389 INFO L168 Benchmark]: TraceAbstraction took 1448.37 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 91.7 MB in the beginning and 89.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 34.6 MB. Max. memory is 8.0 GB. [2021-02-21 16:13:22,392 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 153.1 MB. Free memory is still 125.7 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 485.46 ms. Allocated memory is still 153.1 MB. Free memory was 125.0 MB in the beginning and 102.9 MB in the end (delta: 22.1 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 82.60 ms. Allocated memory is still 153.1 MB. Free memory was 102.9 MB in the beginning and 135.0 MB in the end (delta: -32.1 MB). Peak memory consumption was 6.6 MB. Max. memory is 8.0 GB. * RCFGBuilder took 891.68 ms. Allocated memory is still 153.1 MB. Free memory was 135.0 MB in the beginning and 92.3 MB in the end (delta: 42.7 MB). Peak memory consumption was 43.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1448.37 ms. Allocated memory was 153.1 MB in the beginning and 184.5 MB in the end (delta: 31.5 MB). Free memory was 91.7 MB in the beginning and 89.1 MB in the end (delta: 2.6 MB). Peak memory consumption was 34.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 1034]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L997] SLL* head = malloc(sizeof(SLL)); [L998] head->next = head [L999] head->data = 0 [L1001] SLL* x = head; [L1002] int state = 1; VAL [head={1:0}, malloc(sizeof(SLL))={1:0}, state=1, x={1:0}] [L1005] COND FALSE !(__VERIFIER_nondet_int()) [L1027] x->data = state [L1029] EXPR head->next [L1029] x = head->next [L1030] COND FALSE !(!(((void*)0) != x)) VAL [head={1:0}, malloc(sizeof(SLL))={1:0}, state=1, x={1:0}] [L1032] EXPR x->data VAL [head={1:0}, malloc(sizeof(SLL))={1:0}, state=1, x={1:0}, x->data=1] [L1032] COND TRUE x->data != 0 [L1034] EXPR x->next [L1034] EXPR x->next->data [L1034] EXPR x->next->data != 0 && x->data > x->next->data [L1034] EXPR x->data [L1034] EXPR x->next [L1034] EXPR x->next->data [L1034] EXPR x->next->data != 0 && x->data > x->next->data VAL [head={1:0}, malloc(sizeof(SLL))={1:0}, state=1, x={1:0}, x->data=1, x->next={1:0}, x->next={1:0}, x->next->data=1, x->next->data=1, x->next->data != 0 && x->data > x->next->data=0] [L1034] COND TRUE !(x->next->data != 0 && x->data > x->next->data) [L1034] reach_error() VAL [head={1:0}, malloc(sizeof(SLL))={1:0}, state=1, x={1:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 41 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.3s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 92 SDtfs, 44 SDslu, 66 SDs, 0 SdLazy, 140 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=3, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 24 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 52 NumberOfCodeBlocks, 52 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 32 ConstructedInterpolants, 0 QuantifiedInterpolants, 1852 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...