/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-01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 22:30:22,465 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 22:30:22,468 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 22:30:22,505 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 22:30:22,506 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 22:30:22,507 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 22:30:22,512 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 22:30:22,515 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 22:30:22,520 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 22:30:22,527 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 22:30:22,529 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 22:30:22,532 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 22:30:22,533 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 22:30:22,536 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 22:30:22,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 22:30:22,542 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 22:30:22,544 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 22:30:22,545 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 22:30:22,554 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 22:30:22,584 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 22:30:22,587 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 22:30:22,589 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 22:30:22,591 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 22:30:22,593 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 22:30:22,602 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-06 22:30:22,603 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-06 22:30:22,603 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-06 22:30:22,612 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-06 22:30:22,612 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-06 22:30:22,614 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-06 22:30:22,614 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-06 22:30:22,616 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-06 22:30:22,618 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-06 22:30:22,619 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-06 22:30:22,621 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-06 22:30:22,621 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-06 22:30:22,622 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-06 22:30:22,622 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-06 22:30:22,623 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 22:30:22,624 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 22:30:22,625 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 22:30:22,626 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 [2020-11-06 22:30:22,687 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 22:30:22,688 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 22:30:22,692 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 22:30:22,692 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 22:30:22,693 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 22:30:22,693 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 22:30:22,693 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 22:30:22,694 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 22:30:22,694 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 22:30:22,694 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 22:30:22,696 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 22:30:22,696 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 22:30:22,696 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 22:30:22,696 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 22:30:22,697 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 22:30:22,697 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 22:30:22,697 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 22:30:22,698 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 22:30:22,698 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 22:30:22,698 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 22:30:22,698 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 22:30:22,699 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 22:30:22,699 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 22:30:22,699 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 22:30:22,700 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 22:30:22,700 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 22:30:22,700 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 22:30:22,700 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 22:30:22,701 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 22:30:22,701 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 22:30:23,122 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 22:30:23,148 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 22:30:23,152 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 22:30:23,153 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 22:30:23,154 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 22:30:23,155 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-11-06 22:30:23,242 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1450b1a7a/0980e7148b614788a21f4ec5a3a21fc8/FLAG8408e3e8a [2020-11-06 22:30:24,082 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 22:30:24,083 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-11-06 22:30:24,099 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1450b1a7a/0980e7148b614788a21f4ec5a3a21fc8/FLAG8408e3e8a [2020-11-06 22:30:24,309 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1450b1a7a/0980e7148b614788a21f4ec5a3a21fc8 [2020-11-06 22:30:24,312 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 22:30:24,319 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 22:30:24,321 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 22:30:24,321 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 22:30:24,327 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 22:30:24,328 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:30:24" (1/1) ... [2020-11-06 22:30:24,332 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79578757 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:24, skipping insertion in model container [2020-11-06 22:30:24,332 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:30:24" (1/1) ... [2020-11-06 22:30:24,341 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 22:30:24,386 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 22:30:24,706 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:30:24,716 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 22:30:24,771 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 22:30:24,842 INFO L208 MainTranslator]: Completed translation [2020-11-06 22:30:24,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:24 WrapperNode [2020-11-06 22:30:24,844 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 22:30:24,845 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 22:30:24,845 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 22:30:24,845 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 22:30:24,859 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:24" (1/1) ... [2020-11-06 22:30:24,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:24" (1/1) ... [2020-11-06 22:30:24,902 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:24" (1/1) ... [2020-11-06 22:30:24,902 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:24" (1/1) ... [2020-11-06 22:30:24,964 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:24" (1/1) ... [2020-11-06 22:30:24,984 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:24" (1/1) ... [2020-11-06 22:30:24,989 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:24" (1/1) ... [2020-11-06 22:30:25,002 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 22:30:25,004 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 22:30:25,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 22:30:25,005 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 22:30:25,006 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:24" (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 [2020-11-06 22:30:25,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 22:30:25,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 22:30:25,101 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 22:30:25,101 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 22:30:25,101 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-11-06 22:30:25,101 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-11-06 22:30:25,101 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-11-06 22:30:25,102 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-11-06 22:30:25,102 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-11-06 22:30:25,102 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-11-06 22:30:25,102 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-11-06 22:30:25,102 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-11-06 22:30:25,102 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-11-06 22:30:25,103 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-11-06 22:30:25,103 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-11-06 22:30:25,103 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-11-06 22:30:25,103 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-11-06 22:30:25,103 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-11-06 22:30:25,103 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-11-06 22:30:25,104 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-11-06 22:30:25,104 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-11-06 22:30:25,104 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-11-06 22:30:25,104 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-11-06 22:30:25,104 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-11-06 22:30:25,104 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-11-06 22:30:25,104 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-11-06 22:30:25,105 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-11-06 22:30:25,105 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-11-06 22:30:25,105 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-11-06 22:30:25,105 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-11-06 22:30:25,105 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-11-06 22:30:25,105 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-11-06 22:30:25,105 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-11-06 22:30:25,106 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-11-06 22:30:25,106 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-11-06 22:30:25,106 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-11-06 22:30:25,106 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-11-06 22:30:25,106 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-11-06 22:30:25,106 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-11-06 22:30:25,106 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-11-06 22:30:25,107 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-11-06 22:30:25,107 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-11-06 22:30:25,107 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-11-06 22:30:25,107 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-11-06 22:30:25,107 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-11-06 22:30:25,107 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-11-06 22:30:25,107 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-11-06 22:30:25,108 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-11-06 22:30:25,108 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-11-06 22:30:25,108 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-11-06 22:30:25,108 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-11-06 22:30:25,108 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-11-06 22:30:25,108 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-11-06 22:30:25,108 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-11-06 22:30:25,108 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-06 22:30:25,109 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-11-06 22:30:25,109 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-11-06 22:30:25,109 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-11-06 22:30:25,109 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-11-06 22:30:25,109 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-11-06 22:30:25,109 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-11-06 22:30:25,109 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-11-06 22:30:25,110 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-11-06 22:30:25,110 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 22:30:25,110 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-11-06 22:30:25,110 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-11-06 22:30:25,110 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-11-06 22:30:25,110 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-11-06 22:30:25,111 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-11-06 22:30:25,111 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-11-06 22:30:25,111 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-11-06 22:30:25,111 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-11-06 22:30:25,111 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-11-06 22:30:25,111 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-11-06 22:30:25,111 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-11-06 22:30:25,112 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-11-06 22:30:25,112 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-11-06 22:30:25,112 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-11-06 22:30:25,112 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-11-06 22:30:25,112 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-11-06 22:30:25,112 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-11-06 22:30:25,112 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-11-06 22:30:25,113 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-11-06 22:30:25,113 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-11-06 22:30:25,113 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-11-06 22:30:25,113 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-11-06 22:30:25,113 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-11-06 22:30:25,113 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-11-06 22:30:25,113 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-11-06 22:30:25,114 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-11-06 22:30:25,114 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-11-06 22:30:25,114 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-11-06 22:30:25,114 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-11-06 22:30:25,114 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-11-06 22:30:25,114 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-11-06 22:30:25,114 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-11-06 22:30:25,115 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-11-06 22:30:25,115 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-11-06 22:30:25,115 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-11-06 22:30:25,115 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-11-06 22:30:25,115 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-11-06 22:30:25,115 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-11-06 22:30:25,115 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-11-06 22:30:25,116 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-11-06 22:30:25,116 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-11-06 22:30:25,116 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-11-06 22:30:25,116 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-11-06 22:30:25,116 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-11-06 22:30:25,116 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 22:30:25,116 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-06 22:30:25,116 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-06 22:30:25,117 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 22:30:25,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 22:30:25,117 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 22:30:25,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-06 22:30:25,117 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-06 22:30:25,117 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-06 22:30:25,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 22:30:25,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 22:30:25,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 22:30:25,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 22:30:25,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 22:30:25,118 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 22:30:25,878 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 22:30:25,878 INFO L298 CfgBuilder]: Removed 30 assume(true) statements. [2020-11-06 22:30:25,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:30:25 BoogieIcfgContainer [2020-11-06 22:30:25,881 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 22:30:25,883 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 22:30:25,883 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 22:30:25,887 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 22:30:25,887 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:30:24" (1/3) ... [2020-11-06 22:30:25,888 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d54055a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:30:25, skipping insertion in model container [2020-11-06 22:30:25,888 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:30:24" (2/3) ... [2020-11-06 22:30:25,889 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d54055a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:30:25, skipping insertion in model container [2020-11-06 22:30:25,889 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:30:25" (3/3) ... [2020-11-06 22:30:25,891 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-01-1.i [2020-11-06 22:30:25,910 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 22:30:25,917 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 22:30:25,945 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 22:30:25,996 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 22:30:25,997 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 22:30:25,997 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 22:30:25,997 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 22:30:25,997 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 22:30:25,997 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 22:30:25,997 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 22:30:25,997 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 22:30:26,020 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states. [2020-11-06 22:30:26,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-06 22:30:26,027 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:30:26,028 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:30:26,028 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:30:26,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:30:26,035 INFO L82 PathProgramCache]: Analyzing trace with hash 987864192, now seen corresponding path program 1 times [2020-11-06 22:30:26,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:30:26,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592876527] [2020-11-06 22:30:26,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:30:26,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:26,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:30:26,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:26,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:30:26,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592876527] [2020-11-06 22:30:26,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:30:26,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:30:26,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466625897] [2020-11-06 22:30:26,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:30:26,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:30:26,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:30:26,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:30:26,351 INFO L87 Difference]: Start difference. First operand 93 states. Second operand 4 states. [2020-11-06 22:30:26,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:30:26,683 INFO L93 Difference]: Finished difference Result 179 states and 324 transitions. [2020-11-06 22:30:26,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:30:26,685 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-11-06 22:30:26,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:30:26,701 INFO L225 Difference]: With dead ends: 179 [2020-11-06 22:30:26,702 INFO L226 Difference]: Without dead ends: 87 [2020-11-06 22:30:26,710 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 [2020-11-06 22:30:26,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-11-06 22:30:26,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 72. [2020-11-06 22:30:26,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-06 22:30:26,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2020-11-06 22:30:26,793 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 10 [2020-11-06 22:30:26,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:30:26,793 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2020-11-06 22:30:26,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:30:26,794 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2020-11-06 22:30:26,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-06 22:30:26,796 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:30:26,796 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:30:26,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 22:30:26,796 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:30:26,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:30:26,798 INFO L82 PathProgramCache]: Analyzing trace with hash 496275789, now seen corresponding path program 1 times [2020-11-06 22:30:26,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:30:26,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821221155] [2020-11-06 22:30:26,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:30:26,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:26,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:30:26,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:26,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:30:26,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821221155] [2020-11-06 22:30:26,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:30:26,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:30:26,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242264337] [2020-11-06 22:30:26,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:30:26,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:30:26,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:30:26,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:30:26,985 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand 4 states. [2020-11-06 22:30:27,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:30:27,188 INFO L93 Difference]: Finished difference Result 77 states and 97 transitions. [2020-11-06 22:30:27,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:30:27,188 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-11-06 22:30:27,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:30:27,190 INFO L225 Difference]: With dead ends: 77 [2020-11-06 22:30:27,190 INFO L226 Difference]: Without dead ends: 73 [2020-11-06 22:30:27,191 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 [2020-11-06 22:30:27,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-11-06 22:30:27,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-11-06 22:30:27,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-06 22:30:27,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2020-11-06 22:30:27,202 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 16 [2020-11-06 22:30:27,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:30:27,203 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2020-11-06 22:30:27,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:30:27,203 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2020-11-06 22:30:27,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-06 22:30:27,203 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:30:27,204 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:30:27,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 22:30:27,204 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:30:27,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:30:27,205 INFO L82 PathProgramCache]: Analyzing trace with hash 498122831, now seen corresponding path program 1 times [2020-11-06 22:30:27,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:30:27,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443637780] [2020-11-06 22:30:27,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:30:27,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:27,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:30:27,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:27,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:30:27,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443637780] [2020-11-06 22:30:27,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:30:27,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 22:30:27,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723861357] [2020-11-06 22:30:27,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 22:30:27,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:30:27,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 22:30:27,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:30:27,333 INFO L87 Difference]: Start difference. First operand 73 states and 93 transitions. Second operand 5 states. [2020-11-06 22:30:27,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:30:27,586 INFO L93 Difference]: Finished difference Result 77 states and 96 transitions. [2020-11-06 22:30:27,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 22:30:27,586 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-11-06 22:30:27,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:30:27,588 INFO L225 Difference]: With dead ends: 77 [2020-11-06 22:30:27,588 INFO L226 Difference]: Without dead ends: 73 [2020-11-06 22:30:27,588 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 [2020-11-06 22:30:27,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-11-06 22:30:27,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2020-11-06 22:30:27,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-06 22:30:27,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 90 transitions. [2020-11-06 22:30:27,599 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 90 transitions. Word has length 16 [2020-11-06 22:30:27,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:30:27,599 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 90 transitions. [2020-11-06 22:30:27,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 22:30:27,599 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 90 transitions. [2020-11-06 22:30:27,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-06 22:30:27,600 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:30:27,600 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] [2020-11-06 22:30:27,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-06 22:30:27,601 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:30:27,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:30:27,602 INFO L82 PathProgramCache]: Analyzing trace with hash 265378658, now seen corresponding path program 1 times [2020-11-06 22:30:27,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:30:27,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419809654] [2020-11-06 22:30:27,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:30:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:27,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:30:27,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:27,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:30:27,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419809654] [2020-11-06 22:30:27,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:30:27,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 22:30:27,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361141873] [2020-11-06 22:30:27,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 22:30:27,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:30:27,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 22:30:27,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:30:27,706 INFO L87 Difference]: Start difference. First operand 71 states and 90 transitions. Second operand 5 states. [2020-11-06 22:30:28,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:30:28,001 INFO L93 Difference]: Finished difference Result 175 states and 225 transitions. [2020-11-06 22:30:28,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 22:30:28,002 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-11-06 22:30:28,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:30:28,004 INFO L225 Difference]: With dead ends: 175 [2020-11-06 22:30:28,004 INFO L226 Difference]: Without dead ends: 116 [2020-11-06 22:30:28,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:30:28,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-11-06 22:30:28,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 73. [2020-11-06 22:30:28,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-06 22:30:28,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 92 transitions. [2020-11-06 22:30:28,016 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 92 transitions. Word has length 21 [2020-11-06 22:30:28,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:30:28,016 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 92 transitions. [2020-11-06 22:30:28,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 22:30:28,016 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 92 transitions. [2020-11-06 22:30:28,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-06 22:30:28,017 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:30:28,018 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] [2020-11-06 22:30:28,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-06 22:30:28,018 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:30:28,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:30:28,019 INFO L82 PathProgramCache]: Analyzing trace with hash -127648352, now seen corresponding path program 1 times [2020-11-06 22:30:28,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:30:28,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335951030] [2020-11-06 22:30:28,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:30:28,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:28,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:30:28,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:28,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:30:28,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335951030] [2020-11-06 22:30:28,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:30:28,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:30:28,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034240228] [2020-11-06 22:30:28,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:30:28,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:30:28,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:30:28,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:30:28,129 INFO L87 Difference]: Start difference. First operand 73 states and 92 transitions. Second operand 6 states. [2020-11-06 22:30:28,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:30:28,469 INFO L93 Difference]: Finished difference Result 114 states and 144 transitions. [2020-11-06 22:30:28,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 22:30:28,470 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-11-06 22:30:28,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:30:28,471 INFO L225 Difference]: With dead ends: 114 [2020-11-06 22:30:28,472 INFO L226 Difference]: Without dead ends: 109 [2020-11-06 22:30:28,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-11-06 22:30:28,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-11-06 22:30:28,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-11-06 22:30:28,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-06 22:30:28,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2020-11-06 22:30:28,490 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 21 [2020-11-06 22:30:28,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:30:28,490 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2020-11-06 22:30:28,490 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:30:28,491 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2020-11-06 22:30:28,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-06 22:30:28,492 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:30:28,492 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-06 22:30:28,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-06 22:30:28,493 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:30:28,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:30:28,493 INFO L82 PathProgramCache]: Analyzing trace with hash 334207909, now seen corresponding path program 1 times [2020-11-06 22:30:28,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:30:28,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755646516] [2020-11-06 22:30:28,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:30:28,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:28,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:30:28,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:28,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:30:28,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755646516] [2020-11-06 22:30:28,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:30:28,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 22:30:28,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780700620] [2020-11-06 22:30:28,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 22:30:28,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:30:28,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 22:30:28,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:30:28,633 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand 5 states. [2020-11-06 22:30:28,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:30:28,899 INFO L93 Difference]: Finished difference Result 123 states and 154 transitions. [2020-11-06 22:30:28,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 22:30:28,899 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-11-06 22:30:28,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:30:28,901 INFO L225 Difference]: With dead ends: 123 [2020-11-06 22:30:28,901 INFO L226 Difference]: Without dead ends: 104 [2020-11-06 22:30:28,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:30:28,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-11-06 22:30:28,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 71. [2020-11-06 22:30:28,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-06 22:30:28,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2020-11-06 22:30:28,909 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 22 [2020-11-06 22:30:28,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:30:28,913 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2020-11-06 22:30:28,913 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 22:30:28,913 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2020-11-06 22:30:28,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-06 22:30:28,916 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:30:28,916 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] [2020-11-06 22:30:28,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-06 22:30:28,917 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:30:28,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:30:28,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1622058487, now seen corresponding path program 1 times [2020-11-06 22:30:28,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:30:28,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610332687] [2020-11-06 22:30:28,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:30:28,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:28,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:30:29,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:29,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:30:29,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610332687] [2020-11-06 22:30:29,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:30:29,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:30:29,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118161326] [2020-11-06 22:30:29,014 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:30:29,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:30:29,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:30:29,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:30:29,015 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand 4 states. [2020-11-06 22:30:29,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:30:29,236 INFO L93 Difference]: Finished difference Result 129 states and 163 transitions. [2020-11-06 22:30:29,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:30:29,237 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-11-06 22:30:29,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:30:29,238 INFO L225 Difference]: With dead ends: 129 [2020-11-06 22:30:29,238 INFO L226 Difference]: Without dead ends: 92 [2020-11-06 22:30:29,240 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 [2020-11-06 22:30:29,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-11-06 22:30:29,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 74. [2020-11-06 22:30:29,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-11-06 22:30:29,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2020-11-06 22:30:29,252 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 26 [2020-11-06 22:30:29,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:30:29,253 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2020-11-06 22:30:29,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:30:29,254 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2020-11-06 22:30:29,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-06 22:30:29,257 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:30:29,257 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] [2020-11-06 22:30:29,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-06 22:30:29,257 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:30:29,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:30:29,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1263296047, now seen corresponding path program 1 times [2020-11-06 22:30:29,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:30:29,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885834129] [2020-11-06 22:30:29,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:30:29,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:29,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:30:29,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:29,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:30:29,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885834129] [2020-11-06 22:30:29,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:30:29,351 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:30:29,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626732585] [2020-11-06 22:30:29,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:30:29,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:30:29,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:30:29,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:30:29,355 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand 4 states. [2020-11-06 22:30:29,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:30:29,524 INFO L93 Difference]: Finished difference Result 77 states and 93 transitions. [2020-11-06 22:30:29,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:30:29,525 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-11-06 22:30:29,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:30:29,526 INFO L225 Difference]: With dead ends: 77 [2020-11-06 22:30:29,526 INFO L226 Difference]: Without dead ends: 73 [2020-11-06 22:30:29,526 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 [2020-11-06 22:30:29,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-11-06 22:30:29,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-11-06 22:30:29,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-06 22:30:29,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2020-11-06 22:30:29,532 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 27 [2020-11-06 22:30:29,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:30:29,533 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2020-11-06 22:30:29,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:30:29,533 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2020-11-06 22:30:29,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-06 22:30:29,534 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:30:29,534 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] [2020-11-06 22:30:29,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-06 22:30:29,535 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:30:29,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:30:29,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1688120956, now seen corresponding path program 1 times [2020-11-06 22:30:29,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:30:29,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199220432] [2020-11-06 22:30:29,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:30:29,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:29,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:30:29,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:29,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:30:29,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199220432] [2020-11-06 22:30:29,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:30:29,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:30:29,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341299159] [2020-11-06 22:30:29,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:30:29,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:30:29,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:30:29,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:30:29,621 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand 4 states. [2020-11-06 22:30:29,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:30:29,788 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2020-11-06 22:30:29,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:30:29,790 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-11-06 22:30:29,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:30:29,791 INFO L225 Difference]: With dead ends: 78 [2020-11-06 22:30:29,792 INFO L226 Difference]: Without dead ends: 74 [2020-11-06 22:30:29,792 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 [2020-11-06 22:30:29,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-06 22:30:29,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2020-11-06 22:30:29,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-11-06 22:30:29,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 90 transitions. [2020-11-06 22:30:29,804 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 90 transitions. Word has length 29 [2020-11-06 22:30:29,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:30:29,804 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 90 transitions. [2020-11-06 22:30:29,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:30:29,805 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 90 transitions. [2020-11-06 22:30:29,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-06 22:30:29,806 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:30:29,806 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] [2020-11-06 22:30:29,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-06 22:30:29,806 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:30:29,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:30:29,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1686273914, now seen corresponding path program 1 times [2020-11-06 22:30:29,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:30:29,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787305904] [2020-11-06 22:30:29,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:30:29,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:29,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:30:29,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:29,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:30:29,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787305904] [2020-11-06 22:30:29,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:30:29,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 22:30:29,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767055797] [2020-11-06 22:30:29,928 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 22:30:29,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:30:29,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 22:30:29,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-06 22:30:29,932 INFO L87 Difference]: Start difference. First operand 74 states and 90 transitions. Second operand 5 states. [2020-11-06 22:30:30,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:30:30,145 INFO L93 Difference]: Finished difference Result 78 states and 93 transitions. [2020-11-06 22:30:30,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 22:30:30,146 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-11-06 22:30:30,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:30:30,147 INFO L225 Difference]: With dead ends: 78 [2020-11-06 22:30:30,147 INFO L226 Difference]: Without dead ends: 74 [2020-11-06 22:30:30,148 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 [2020-11-06 22:30:30,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-06 22:30:30,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2020-11-06 22:30:30,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-06 22:30:30,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2020-11-06 22:30:30,154 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 29 [2020-11-06 22:30:30,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:30:30,154 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2020-11-06 22:30:30,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 22:30:30,154 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2020-11-06 22:30:30,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-06 22:30:30,159 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:30:30,159 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] [2020-11-06 22:30:30,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-06 22:30:30,159 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:30:30,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:30:30,160 INFO L82 PathProgramCache]: Analyzing trace with hash 1218900559, now seen corresponding path program 1 times [2020-11-06 22:30:30,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:30:30,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349361710] [2020-11-06 22:30:30,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:30:30,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:30,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:30:30,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:30,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:30:30,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349361710] [2020-11-06 22:30:30,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:30:30,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-06 22:30:30,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732488639] [2020-11-06 22:30:30,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-06 22:30:30,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:30:30,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-06 22:30:30,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:30:30,307 INFO L87 Difference]: Start difference. First operand 72 states and 87 transitions. Second operand 7 states. [2020-11-06 22:30:30,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:30:30,781 INFO L93 Difference]: Finished difference Result 167 states and 207 transitions. [2020-11-06 22:30:30,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-06 22:30:30,782 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 30 [2020-11-06 22:30:30,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:30:30,784 INFO L225 Difference]: With dead ends: 167 [2020-11-06 22:30:30,784 INFO L226 Difference]: Without dead ends: 128 [2020-11-06 22:30:30,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-11-06 22:30:30,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-11-06 22:30:30,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 82. [2020-11-06 22:30:30,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-11-06 22:30:30,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 98 transitions. [2020-11-06 22:30:30,792 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 98 transitions. Word has length 30 [2020-11-06 22:30:30,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:30:30,793 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 98 transitions. [2020-11-06 22:30:30,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-06 22:30:30,793 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 98 transitions. [2020-11-06 22:30:30,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-06 22:30:30,794 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:30:30,794 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] [2020-11-06 22:30:30,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-06 22:30:30,795 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:30:30,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:30:30,795 INFO L82 PathProgramCache]: Analyzing trace with hash -964421169, now seen corresponding path program 1 times [2020-11-06 22:30:30,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:30:30,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671086110] [2020-11-06 22:30:30,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:30:30,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:31,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:30:31,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:31,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 22:30:31,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671086110] [2020-11-06 22:30:31,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:30:31,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-11-06 22:30:31,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721847041] [2020-11-06 22:30:31,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-06 22:30:31,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:30:31,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-06 22:30:31,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-11-06 22:30:31,090 INFO L87 Difference]: Start difference. First operand 82 states and 98 transitions. Second operand 8 states. [2020-11-06 22:30:32,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:30:32,141 INFO L93 Difference]: Finished difference Result 224 states and 274 transitions. [2020-11-06 22:30:32,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-06 22:30:32,142 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-11-06 22:30:32,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:30:32,146 INFO L225 Difference]: With dead ends: 224 [2020-11-06 22:30:32,147 INFO L226 Difference]: Without dead ends: 220 [2020-11-06 22:30:32,148 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2020-11-06 22:30:32,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-11-06 22:30:32,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 94. [2020-11-06 22:30:32,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-11-06 22:30:32,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 112 transitions. [2020-11-06 22:30:32,161 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 112 transitions. Word has length 30 [2020-11-06 22:30:32,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:30:32,161 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 112 transitions. [2020-11-06 22:30:32,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-06 22:30:32,161 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 112 transitions. [2020-11-06 22:30:32,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-06 22:30:32,165 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:30:32,165 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] [2020-11-06 22:30:32,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-06 22:30:32,166 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:30:32,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:30:32,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1480227389, now seen corresponding path program 1 times [2020-11-06 22:30:32,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:30:32,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264421395] [2020-11-06 22:30:32,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:30:32,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:32,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:30:32,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:32,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-06 22:30:32,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264421395] [2020-11-06 22:30:32,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:30:32,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-06 22:30:32,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694456367] [2020-11-06 22:30:32,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-06 22:30:32,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:30:32,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-06 22:30:32,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-06 22:30:32,329 INFO L87 Difference]: Start difference. First operand 94 states and 112 transitions. Second operand 6 states. [2020-11-06 22:30:32,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:30:32,693 INFO L93 Difference]: Finished difference Result 137 states and 166 transitions. [2020-11-06 22:30:32,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-06 22:30:32,693 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-11-06 22:30:32,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:30:32,695 INFO L225 Difference]: With dead ends: 137 [2020-11-06 22:30:32,696 INFO L226 Difference]: Without dead ends: 119 [2020-11-06 22:30:32,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 22:30:32,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-11-06 22:30:32,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 114. [2020-11-06 22:30:32,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-11-06 22:30:32,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 139 transitions. [2020-11-06 22:30:32,712 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 139 transitions. Word has length 32 [2020-11-06 22:30:32,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:30:32,713 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 139 transitions. [2020-11-06 22:30:32,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-06 22:30:32,713 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 139 transitions. [2020-11-06 22:30:32,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-06 22:30:32,714 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:30:32,714 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] [2020-11-06 22:30:32,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-06 22:30:32,714 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:30:32,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:30:32,715 INFO L82 PathProgramCache]: Analyzing trace with hash 586599747, now seen corresponding path program 1 times [2020-11-06 22:30:32,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:30:32,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821119405] [2020-11-06 22:30:32,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:30:32,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:32,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 22:30:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 22:30:32,785 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-06 22:30:32,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821119405] [2020-11-06 22:30:32,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 22:30:32,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 22:30:32,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496507133] [2020-11-06 22:30:32,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 22:30:32,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 22:30:32,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 22:30:32,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 22:30:32,787 INFO L87 Difference]: Start difference. First operand 114 states and 139 transitions. Second operand 4 states. [2020-11-06 22:30:32,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 22:30:32,986 INFO L93 Difference]: Finished difference Result 117 states and 141 transitions. [2020-11-06 22:30:32,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 22:30:32,987 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-11-06 22:30:32,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 22:30:32,988 INFO L225 Difference]: With dead ends: 117 [2020-11-06 22:30:32,988 INFO L226 Difference]: Without dead ends: 113 [2020-11-06 22:30:32,989 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 [2020-11-06 22:30:32,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-11-06 22:30:32,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2020-11-06 22:30:32,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-11-06 22:30:32,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 137 transitions. [2020-11-06 22:30:32,999 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 137 transitions. Word has length 32 [2020-11-06 22:30:32,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 22:30:32,999 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 137 transitions. [2020-11-06 22:30:33,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 22:30:33,000 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 137 transitions. [2020-11-06 22:30:33,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-06 22:30:33,000 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 22:30:33,001 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] [2020-11-06 22:30:33,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-06 22:30:33,001 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 22:30:33,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 22:30:33,002 INFO L82 PathProgramCache]: Analyzing trace with hash 2008414403, now seen corresponding path program 1 times [2020-11-06 22:30:33,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 22:30:33,002 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379441354] [2020-11-06 22:30:33,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 22:30:33,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:30:33,034 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:30:33,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-06 22:30:33,066 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-06 22:30:33,117 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-06 22:30:33,117 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-06 22:30:33,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-06 22:30:33,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 10:30:33 BoogieIcfgContainer [2020-11-06 22:30:33,194 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-06 22:30:33,197 INFO L168 Benchmark]: Toolchain (without parser) took 8881.81 ms. Allocated memory was 153.1 MB in the beginning and 200.3 MB in the end (delta: 47.2 MB). Free memory was 127.5 MB in the beginning and 86.7 MB in the end (delta: 40.8 MB). Peak memory consumption was 88.7 MB. Max. memory is 8.0 GB. [2020-11-06 22:30:33,197 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 153.1 MB. Free memory is still 125.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-06 22:30:33,199 INFO L168 Benchmark]: CACSL2BoogieTranslator took 523.03 ms. Allocated memory is still 153.1 MB. Free memory was 126.8 MB in the beginning and 104.1 MB in the end (delta: 22.7 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-11-06 22:30:33,200 INFO L168 Benchmark]: Boogie Preprocessor took 157.92 ms. Allocated memory is still 153.1 MB. Free memory was 104.1 MB in the beginning and 134.8 MB in the end (delta: -30.7 MB). Peak memory consumption was 6.5 MB. Max. memory is 8.0 GB. [2020-11-06 22:30:33,210 INFO L168 Benchmark]: RCFGBuilder took 877.30 ms. Allocated memory is still 153.1 MB. Free memory was 134.8 MB in the beginning and 79.2 MB in the end (delta: 55.6 MB). Peak memory consumption was 55.6 MB. Max. memory is 8.0 GB. [2020-11-06 22:30:33,212 INFO L168 Benchmark]: TraceAbstraction took 7311.23 ms. Allocated memory was 153.1 MB in the beginning and 200.3 MB in the end (delta: 47.2 MB). Free memory was 78.7 MB in the beginning and 86.7 MB in the end (delta: -8.0 MB). Peak memory consumption was 39.2 MB. Max. memory is 8.0 GB. [2020-11-06 22:30:33,215 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 153.1 MB. Free memory is still 125.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 523.03 ms. Allocated memory is still 153.1 MB. Free memory was 126.8 MB in the beginning and 104.1 MB in the end (delta: 22.7 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 157.92 ms. Allocated memory is still 153.1 MB. Free memory was 104.1 MB in the beginning and 134.8 MB in the end (delta: -30.7 MB). Peak memory consumption was 6.5 MB. Max. memory is 8.0 GB. * RCFGBuilder took 877.30 ms. Allocated memory is still 153.1 MB. Free memory was 134.8 MB in the beginning and 79.2 MB in the end (delta: 55.6 MB). Peak memory consumption was 55.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 7311.23 ms. Allocated memory was 153.1 MB in the beginning and 200.3 MB in the end (delta: 47.2 MB). Free memory was 78.7 MB in the beginning and 86.7 MB in the end (delta: -8.0 MB). Peak memory consumption was 39.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 992]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L1003] SLL* list = malloc(sizeof(SLL)); [L1004] list->next = ((void*)0) [L1005] list->prev = ((void*)0) VAL [list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1006] COND FALSE !(!(list != ((void*)0))) VAL [list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1006] COND FALSE !(__VERIFIER_nondet_int()) [L1006] list->inner = malloc(sizeof(SLL)) [L1006] EXPR list->inner [L1006] list->inner->next = ((void*)0) [L1006] EXPR list->inner [L1006] list->inner->inner = ((void*)0) [L1006] EXPR list->inner [L1006] EXPR list->inner != ((void*)0) || list->inner == ((void*)0) VAL [list={-1:0}, list->inner={-2:0}, list->inner != ((void*)0) || list->inner == ((void*)0)=1, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1006] COND FALSE !(!(list->inner != ((void*)0) || list->inner == ((void*)0))) [L1008] SLL* end = list; VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1011] COND FALSE !(__VERIFIER_nondet_int()) [L1022] end = ((void*)0) [L1023] end = list VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1026] COND FALSE !(!(((void*)0) != end)) VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1028] COND TRUE ((void*)0) != end [L1030] int len = 0; [L1031] EXPR end->inner [L1031] SLL* inner = end->inner; [L1032] COND TRUE ((void*)0) != inner VAL [end={-1:0}, inner={-2:0}, len=0, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1034] COND TRUE len == 0 [L1035] len = 1 VAL [end={-1:0}, inner={-2:0}, len=1, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1038] COND FALSE !(!(((void*)0) != inner)) VAL [end={-1:0}, inner={-2:0}, len=1, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1039] EXPR inner->inner VAL [end={-1:0}, inner={-2:0}, inner->inner={0:0}, len=1, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1039] COND FALSE !(!(((void*)0) == inner->inner)) [L1040] EXPR inner->next VAL [end={-1:0}, inner={-2:0}, inner->next={0:0}, len=1, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1040] COND TRUE !(((void*)0) != inner->next) [L1040] CALL reach_error() [L992] COND FALSE !(0) [L992] __assert_fail ("0", "dll-01-1.c", 12, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 93 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.1s, OverallIterations: 15, TraceHistogramMax: 1, AutomataDifference: 4.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1091 SDtfs, 856 SDslu, 1530 SDs, 0 SdLazy, 1941 SolverSat, 236 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 99 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=114occurred in iteration=13, 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, 14 MinimizatonAttempts, 328 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 374 NumberOfCodeBlocks, 374 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 327 ConstructedInterpolants, 0 QuantifiedInterpolants, 51708 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 14 PerfectInterpolantSequences, 2/2 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...