/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/forester-heap/dll-01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 01:07:54,523 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 01:07:54,527 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 01:07:54,571 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-24 01:07:54,572 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-24 01:07:54,573 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-24 01:07:54,576 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-24 01:07:54,579 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-24 01:07:54,582 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-24 01:07:54,583 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-24 01:07:54,585 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-24 01:07:54,587 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-24 01:07:54,588 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 01:07:54,589 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 01:07:54,591 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 01:07:54,593 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 01:07:54,594 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 01:07:54,596 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 01:07:54,598 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 01:07:54,600 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 01:07:54,603 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 01:07:54,610 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 01:07:54,611 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 01:07:54,613 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 01:07:54,616 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-24 01:07:54,617 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-24 01:07:54,617 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-24 01:07:54,619 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-24 01:07:54,620 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-24 01:07:54,622 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-24 01:07:54,623 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-24 01:07:54,624 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-24 01:07:54,625 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-24 01:07:54,627 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-24 01:07:54,628 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-24 01:07:54,629 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-24 01:07:54,631 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-24 01:07:54,631 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-24 01:07:54,631 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 01:07:54,633 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 01:07:54,634 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 01:07:54,636 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-24 01:07:54,660 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 01:07:54,661 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 01:07:54,663 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 01:07:54,664 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 01:07:54,664 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 01:07:54,664 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 01:07:54,664 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 01:07:54,665 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 01:07:54,665 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 01:07:54,665 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 01:07:54,666 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 01:07:54,666 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 01:07:54,666 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 01:07:54,667 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 01:07:54,667 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 01:07:54,667 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 01:07:54,667 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 01:07:54,668 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 01:07:54,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 01:07:54,668 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 01:07:54,669 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 01:07:54,669 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 01:07:54,669 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 01:07:55,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 01:07:55,227 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 01:07:55,232 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 01:07:55,234 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 01:07:55,235 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 01:07:55,238 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-10-24 01:07:55,348 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/310252afd/0fdab704d6054dceac95c07b3355afd7/FLAGfadf803bb [2020-10-24 01:07:56,199 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 01:07:56,200 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/forester-heap/dll-01-1.i [2020-10-24 01:07:56,216 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/310252afd/0fdab704d6054dceac95c07b3355afd7/FLAGfadf803bb [2020-10-24 01:07:56,467 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/310252afd/0fdab704d6054dceac95c07b3355afd7 [2020-10-24 01:07:56,475 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 01:07:56,488 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 01:07:56,492 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 01:07:56,493 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 01:07:56,497 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 01:07:56,499 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 01:07:56" (1/1) ... [2020-10-24 01:07:56,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c55ed59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:07:56, skipping insertion in model container [2020-10-24 01:07:56,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 01:07:56" (1/1) ... [2020-10-24 01:07:56,516 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 01:07:56,593 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 01:07:57,004 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 01:07:57,018 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 01:07:57,100 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 01:07:57,164 INFO L208 MainTranslator]: Completed translation [2020-10-24 01:07:57,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:07:57 WrapperNode [2020-10-24 01:07:57,165 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 01:07:57,166 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 01:07:57,166 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 01:07:57,167 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 01:07:57,183 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:07:57" (1/1) ... [2020-10-24 01:07:57,183 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:07:57" (1/1) ... [2020-10-24 01:07:57,213 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:07:57" (1/1) ... [2020-10-24 01:07:57,213 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:07:57" (1/1) ... [2020-10-24 01:07:57,280 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:07:57" (1/1) ... [2020-10-24 01:07:57,300 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:07:57" (1/1) ... [2020-10-24 01:07:57,315 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:07:57" (1/1) ... [2020-10-24 01:07:57,329 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 01:07:57,330 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 01:07:57,331 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 01:07:57,331 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 01:07:57,332 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:07:57" (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 [2020-10-24 01:07:57,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 01:07:57,430 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 01:07:57,431 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 01:07:57,431 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 01:07:57,431 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-24 01:07:57,432 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-24 01:07:57,432 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-24 01:07:57,433 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-24 01:07:57,433 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-24 01:07:57,433 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-24 01:07:57,433 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-24 01:07:57,433 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-24 01:07:57,433 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-24 01:07:57,434 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-24 01:07:57,434 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-24 01:07:57,435 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-24 01:07:57,435 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-24 01:07:57,435 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-24 01:07:57,435 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-24 01:07:57,437 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-24 01:07:57,437 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-24 01:07:57,437 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-24 01:07:57,440 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-24 01:07:57,441 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-24 01:07:57,441 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-24 01:07:57,441 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-24 01:07:57,441 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-24 01:07:57,441 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-24 01:07:57,442 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-24 01:07:57,442 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-24 01:07:57,442 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-24 01:07:57,443 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-24 01:07:57,443 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-24 01:07:57,443 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-24 01:07:57,443 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-24 01:07:57,443 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-24 01:07:57,443 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-24 01:07:57,444 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-24 01:07:57,444 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-24 01:07:57,444 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-24 01:07:57,444 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-24 01:07:57,444 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-24 01:07:57,444 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-24 01:07:57,444 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-24 01:07:57,445 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-24 01:07:57,445 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-24 01:07:57,445 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-24 01:07:57,445 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-24 01:07:57,445 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-24 01:07:57,445 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-24 01:07:57,446 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-24 01:07:57,446 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-24 01:07:57,446 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-24 01:07:57,446 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-24 01:07:57,446 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-24 01:07:57,447 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-24 01:07:57,447 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-24 01:07:57,447 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-24 01:07:57,447 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-24 01:07:57,447 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-24 01:07:57,447 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-24 01:07:57,447 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-24 01:07:57,449 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-24 01:07:57,449 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 01:07:57,449 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-24 01:07:57,449 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-24 01:07:57,450 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-24 01:07:57,450 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-24 01:07:57,450 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-24 01:07:57,450 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-24 01:07:57,450 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-24 01:07:57,450 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-24 01:07:57,450 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-24 01:07:57,451 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-24 01:07:57,451 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-24 01:07:57,451 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-24 01:07:57,451 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-24 01:07:57,451 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-24 01:07:57,451 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-24 01:07:57,451 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-24 01:07:57,452 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-24 01:07:57,452 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-24 01:07:57,452 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-24 01:07:57,452 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-24 01:07:57,452 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-24 01:07:57,452 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-24 01:07:57,453 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-24 01:07:57,453 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-24 01:07:57,453 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-24 01:07:57,453 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-24 01:07:57,453 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-24 01:07:57,454 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-24 01:07:57,454 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-24 01:07:57,454 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-24 01:07:57,454 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-24 01:07:57,454 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-24 01:07:57,454 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-24 01:07:57,455 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-24 01:07:57,455 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-24 01:07:57,455 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-24 01:07:57,455 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-24 01:07:57,455 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-24 01:07:57,456 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-24 01:07:57,456 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-24 01:07:57,456 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-24 01:07:57,456 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-24 01:07:57,456 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-24 01:07:57,456 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-24 01:07:57,456 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 01:07:57,457 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-24 01:07:57,457 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-24 01:07:57,457 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 01:07:57,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 01:07:57,457 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 01:07:57,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-24 01:07:57,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-24 01:07:57,458 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-24 01:07:57,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 01:07:57,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 01:07:57,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 01:07:57,458 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 01:07:57,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 01:07:57,459 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 01:07:58,497 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 01:07:58,497 INFO L298 CfgBuilder]: Removed 30 assume(true) statements. [2020-10-24 01:07:58,502 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 01:07:58 BoogieIcfgContainer [2020-10-24 01:07:58,502 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 01:07:58,509 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 01:07:58,510 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 01:07:58,517 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 01:07:58,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 01:07:56" (1/3) ... [2020-10-24 01:07:58,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eb6ffe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 01:07:58, skipping insertion in model container [2020-10-24 01:07:58,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 01:07:57" (2/3) ... [2020-10-24 01:07:58,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1eb6ffe5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 01:07:58, skipping insertion in model container [2020-10-24 01:07:58,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 01:07:58" (3/3) ... [2020-10-24 01:07:58,524 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-01-1.i [2020-10-24 01:07:58,546 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 01:07:58,560 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 01:07:58,587 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 01:07:58,646 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 01:07:58,646 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 01:07:58,646 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 01:07:58,648 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 01:07:58,649 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 01:07:58,653 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 01:07:58,653 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 01:07:58,655 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 01:07:58,689 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states. [2020-10-24 01:07:58,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-24 01:07:58,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:07:58,702 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:07:58,703 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:07:58,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:07:58,711 INFO L82 PathProgramCache]: Analyzing trace with hash -296062564, now seen corresponding path program 1 times [2020-10-24 01:07:58,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:07:58,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257001284] [2020-10-24 01:07:58,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:07:58,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:07:59,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:07:59,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:07:59,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:07:59,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257001284] [2020-10-24 01:07:59,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:07:59,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-24 01:07:59,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667191699] [2020-10-24 01:07:59,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-24 01:07:59,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:07:59,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-24 01:07:59,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-24 01:07:59,104 INFO L87 Difference]: Start difference. First operand 181 states. Second operand 5 states. [2020-10-24 01:07:59,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:07:59,732 INFO L93 Difference]: Finished difference Result 357 states and 502 transitions. [2020-10-24 01:07:59,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-24 01:07:59,735 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-24 01:07:59,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:07:59,751 INFO L225 Difference]: With dead ends: 357 [2020-10-24 01:07:59,751 INFO L226 Difference]: Without dead ends: 186 [2020-10-24 01:07:59,759 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 [2020-10-24 01:07:59,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-24 01:07:59,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 159. [2020-10-24 01:07:59,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-24 01:07:59,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 179 transitions. [2020-10-24 01:07:59,841 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 179 transitions. Word has length 19 [2020-10-24 01:07:59,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:07:59,842 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 179 transitions. [2020-10-24 01:07:59,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-24 01:07:59,842 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 179 transitions. [2020-10-24 01:07:59,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-24 01:07:59,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:07:59,844 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] [2020-10-24 01:07:59,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 01:07:59,844 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:07:59,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:07:59,846 INFO L82 PathProgramCache]: Analyzing trace with hash -333799104, now seen corresponding path program 1 times [2020-10-24 01:07:59,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:07:59,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735116277] [2020-10-24 01:07:59,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:07:59,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:07:59,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:07:59,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:07:59,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:07:59,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735116277] [2020-10-24 01:07:59,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:07:59,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 01:07:59,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479740466] [2020-10-24 01:08:00,004 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 01:08:00,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:08:00,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 01:08:00,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 01:08:00,006 INFO L87 Difference]: Start difference. First operand 159 states and 179 transitions. Second operand 4 states. [2020-10-24 01:08:00,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:08:00,431 INFO L93 Difference]: Finished difference Result 167 states and 187 transitions. [2020-10-24 01:08:00,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 01:08:00,431 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-24 01:08:00,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:08:00,434 INFO L225 Difference]: With dead ends: 167 [2020-10-24 01:08:00,434 INFO L226 Difference]: Without dead ends: 160 [2020-10-24 01:08:00,436 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 [2020-10-24 01:08:00,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-24 01:08:00,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2020-10-24 01:08:00,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-24 01:08:00,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 180 transitions. [2020-10-24 01:08:00,460 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 180 transitions. Word has length 31 [2020-10-24 01:08:00,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:08:00,460 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 180 transitions. [2020-10-24 01:08:00,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 01:08:00,461 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 180 transitions. [2020-10-24 01:08:00,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-24 01:08:00,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:08:00,462 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] [2020-10-24 01:08:00,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 01:08:00,463 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:08:00,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:08:00,464 INFO L82 PathProgramCache]: Analyzing trace with hash -885790979, now seen corresponding path program 1 times [2020-10-24 01:08:00,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:08:00,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1223455397] [2020-10-24 01:08:00,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:08:00,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:00,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:08:00,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:00,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:08:00,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1223455397] [2020-10-24 01:08:00,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:08:00,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-24 01:08:00,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349283912] [2020-10-24 01:08:00,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-24 01:08:00,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:08:00,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-24 01:08:00,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-24 01:08:00,651 INFO L87 Difference]: Start difference. First operand 160 states and 180 transitions. Second operand 8 states. [2020-10-24 01:08:01,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:08:01,521 INFO L93 Difference]: Finished difference Result 245 states and 278 transitions. [2020-10-24 01:08:01,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-24 01:08:01,522 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-24 01:08:01,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:08:01,525 INFO L225 Difference]: With dead ends: 245 [2020-10-24 01:08:01,525 INFO L226 Difference]: Without dead ends: 238 [2020-10-24 01:08:01,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-10-24 01:08:01,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-24 01:08:01,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 155. [2020-10-24 01:08:01,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-24 01:08:01,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 174 transitions. [2020-10-24 01:08:01,551 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 174 transitions. Word has length 33 [2020-10-24 01:08:01,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:08:01,552 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 174 transitions. [2020-10-24 01:08:01,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-24 01:08:01,552 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 174 transitions. [2020-10-24 01:08:01,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-24 01:08:01,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:08:01,554 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:08:01,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 01:08:01,554 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:08:01,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:08:01,555 INFO L82 PathProgramCache]: Analyzing trace with hash 531390644, now seen corresponding path program 1 times [2020-10-24 01:08:01,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:08:01,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1973531617] [2020-10-24 01:08:01,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:08:01,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:01,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:08:01,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:01,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:08:01,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1973531617] [2020-10-24 01:08:01,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:08:01,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-24 01:08:01,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094570902] [2020-10-24 01:08:01,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 01:08:01,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:08:01,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 01:08:01,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-24 01:08:01,678 INFO L87 Difference]: Start difference. First operand 155 states and 174 transitions. Second operand 6 states. [2020-10-24 01:08:02,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:08:02,269 INFO L93 Difference]: Finished difference Result 357 states and 407 transitions. [2020-10-24 01:08:02,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-24 01:08:02,269 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-10-24 01:08:02,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:08:02,271 INFO L225 Difference]: With dead ends: 357 [2020-10-24 01:08:02,272 INFO L226 Difference]: Without dead ends: 237 [2020-10-24 01:08:02,274 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 [2020-10-24 01:08:02,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-24 01:08:02,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 158. [2020-10-24 01:08:02,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-24 01:08:02,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 177 transitions. [2020-10-24 01:08:02,298 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 177 transitions. Word has length 39 [2020-10-24 01:08:02,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:08:02,298 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 177 transitions. [2020-10-24 01:08:02,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 01:08:02,299 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 177 transitions. [2020-10-24 01:08:02,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-24 01:08:02,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:08:02,300 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:08:02,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 01:08:02,301 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:08:02,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:08:02,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1103718031, now seen corresponding path program 1 times [2020-10-24 01:08:02,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:08:02,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292894673] [2020-10-24 01:08:02,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:08:02,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:02,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:08:02,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:02,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:08:02,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292894673] [2020-10-24 01:08:02,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:08:02,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-24 01:08:02,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171261082] [2020-10-24 01:08:02,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 01:08:02,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:08:02,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 01:08:02,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-24 01:08:02,418 INFO L87 Difference]: Start difference. First operand 158 states and 177 transitions. Second operand 6 states. [2020-10-24 01:08:03,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:08:03,034 INFO L93 Difference]: Finished difference Result 259 states and 293 transitions. [2020-10-24 01:08:03,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-24 01:08:03,035 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-10-24 01:08:03,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:08:03,037 INFO L225 Difference]: With dead ends: 259 [2020-10-24 01:08:03,038 INFO L226 Difference]: Without dead ends: 228 [2020-10-24 01:08:03,039 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 [2020-10-24 01:08:03,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-24 01:08:03,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 158. [2020-10-24 01:08:03,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-24 01:08:03,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 176 transitions. [2020-10-24 01:08:03,093 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 176 transitions. Word has length 41 [2020-10-24 01:08:03,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:08:03,097 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 176 transitions. [2020-10-24 01:08:03,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 01:08:03,097 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 176 transitions. [2020-10-24 01:08:03,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-24 01:08:03,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:08:03,100 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:08:03,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-24 01:08:03,101 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:08:03,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:08:03,102 INFO L82 PathProgramCache]: Analyzing trace with hash -107537349, now seen corresponding path program 1 times [2020-10-24 01:08:03,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:08:03,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957249364] [2020-10-24 01:08:03,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:08:03,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:03,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:08:03,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:03,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:08:03,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1957249364] [2020-10-24 01:08:03,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:08:03,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-24 01:08:03,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867085433] [2020-10-24 01:08:03,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-24 01:08:03,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:08:03,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-24 01:08:03,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-24 01:08:03,401 INFO L87 Difference]: Start difference. First operand 158 states and 176 transitions. Second operand 12 states. [2020-10-24 01:08:04,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:08:04,612 INFO L93 Difference]: Finished difference Result 276 states and 310 transitions. [2020-10-24 01:08:04,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-24 01:08:04,613 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2020-10-24 01:08:04,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:08:04,616 INFO L225 Difference]: With dead ends: 276 [2020-10-24 01:08:04,617 INFO L226 Difference]: Without dead ends: 271 [2020-10-24 01:08:04,618 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2020-10-24 01:08:04,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-10-24 01:08:04,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 173. [2020-10-24 01:08:04,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-24 01:08:04,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 192 transitions. [2020-10-24 01:08:04,649 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 192 transitions. Word has length 48 [2020-10-24 01:08:04,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:08:04,652 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 192 transitions. [2020-10-24 01:08:04,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-24 01:08:04,653 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 192 transitions. [2020-10-24 01:08:04,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-24 01:08:04,663 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:08:04,663 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:08:04,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-24 01:08:04,664 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:08:04,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:08:04,668 INFO L82 PathProgramCache]: Analyzing trace with hash -135462151, now seen corresponding path program 1 times [2020-10-24 01:08:04,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:08:04,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684045939] [2020-10-24 01:08:04,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:08:04,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:04,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:08:04,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:04,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:08:04,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684045939] [2020-10-24 01:08:04,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:08:04,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 01:08:04,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300127633] [2020-10-24 01:08:04,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 01:08:04,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:08:04,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 01:08:04,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 01:08:04,889 INFO L87 Difference]: Start difference. First operand 173 states and 192 transitions. Second operand 4 states. [2020-10-24 01:08:05,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:08:05,388 INFO L93 Difference]: Finished difference Result 272 states and 309 transitions. [2020-10-24 01:08:05,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 01:08:05,388 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2020-10-24 01:08:05,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:08:05,391 INFO L225 Difference]: With dead ends: 272 [2020-10-24 01:08:05,391 INFO L226 Difference]: Without dead ends: 209 [2020-10-24 01:08:05,394 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 [2020-10-24 01:08:05,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-24 01:08:05,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 176. [2020-10-24 01:08:05,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-24 01:08:05,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 196 transitions. [2020-10-24 01:08:05,439 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 196 transitions. Word has length 49 [2020-10-24 01:08:05,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:08:05,440 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 196 transitions. [2020-10-24 01:08:05,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 01:08:05,440 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 196 transitions. [2020-10-24 01:08:05,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-24 01:08:05,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:08:05,442 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:08:05,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-24 01:08:05,443 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:08:05,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:08:05,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1820914827, now seen corresponding path program 1 times [2020-10-24 01:08:05,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:08:05,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334452492] [2020-10-24 01:08:05,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:08:05,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:05,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:08:05,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:05,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:08:05,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334452492] [2020-10-24 01:08:05,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:08:05,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 01:08:05,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973609015] [2020-10-24 01:08:05,615 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 01:08:05,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:08:05,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 01:08:05,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 01:08:05,619 INFO L87 Difference]: Start difference. First operand 176 states and 196 transitions. Second operand 4 states. [2020-10-24 01:08:06,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:08:06,030 INFO L93 Difference]: Finished difference Result 179 states and 198 transitions. [2020-10-24 01:08:06,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 01:08:06,033 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-10-24 01:08:06,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:08:06,037 INFO L225 Difference]: With dead ends: 179 [2020-10-24 01:08:06,037 INFO L226 Difference]: Without dead ends: 175 [2020-10-24 01:08:06,038 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 [2020-10-24 01:08:06,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-24 01:08:06,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2020-10-24 01:08:06,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-24 01:08:06,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 194 transitions. [2020-10-24 01:08:06,074 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 194 transitions. Word has length 51 [2020-10-24 01:08:06,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:08:06,075 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 194 transitions. [2020-10-24 01:08:06,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 01:08:06,075 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 194 transitions. [2020-10-24 01:08:06,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-24 01:08:06,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:08:06,078 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:08:06,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-24 01:08:06,080 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:08:06,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:08:06,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1210911317, now seen corresponding path program 1 times [2020-10-24 01:08:06,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:08:06,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744883332] [2020-10-24 01:08:06,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:08:06,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:06,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:08:06,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:06,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:08:06,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744883332] [2020-10-24 01:08:06,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:08:06,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-24 01:08:06,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296468108] [2020-10-24 01:08:06,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-24 01:08:06,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:08:06,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-24 01:08:06,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-24 01:08:06,398 INFO L87 Difference]: Start difference. First operand 175 states and 194 transitions. Second operand 9 states. [2020-10-24 01:08:07,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:08:07,389 INFO L93 Difference]: Finished difference Result 356 states and 401 transitions. [2020-10-24 01:08:07,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-24 01:08:07,390 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-10-24 01:08:07,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:08:07,393 INFO L225 Difference]: With dead ends: 356 [2020-10-24 01:08:07,393 INFO L226 Difference]: Without dead ends: 291 [2020-10-24 01:08:07,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-10-24 01:08:07,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-24 01:08:07,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 194. [2020-10-24 01:08:07,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-24 01:08:07,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 214 transitions. [2020-10-24 01:08:07,433 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 214 transitions. Word has length 55 [2020-10-24 01:08:07,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:08:07,436 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 214 transitions. [2020-10-24 01:08:07,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-24 01:08:07,436 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 214 transitions. [2020-10-24 01:08:07,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-24 01:08:07,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:08:07,439 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:08:07,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-24 01:08:07,440 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:08:07,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:08:07,441 INFO L82 PathProgramCache]: Analyzing trace with hash -270220700, now seen corresponding path program 1 times [2020-10-24 01:08:07,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:08:07,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [813614889] [2020-10-24 01:08:07,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:08:07,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:07,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:08:07,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:07,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-24 01:08:07,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [813614889] [2020-10-24 01:08:07,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:08:07,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-24 01:08:07,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830899389] [2020-10-24 01:08:07,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-24 01:08:07,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:08:07,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-24 01:08:07,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-24 01:08:07,690 INFO L87 Difference]: Start difference. First operand 194 states and 214 transitions. Second operand 8 states. [2020-10-24 01:08:08,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:08:08,390 INFO L93 Difference]: Finished difference Result 275 states and 306 transitions. [2020-10-24 01:08:08,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-24 01:08:08,390 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 60 [2020-10-24 01:08:08,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:08:08,392 INFO L225 Difference]: With dead ends: 275 [2020-10-24 01:08:08,393 INFO L226 Difference]: Without dead ends: 245 [2020-10-24 01:08:08,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-10-24 01:08:08,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-10-24 01:08:08,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 229. [2020-10-24 01:08:08,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-24 01:08:08,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 256 transitions. [2020-10-24 01:08:08,440 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 256 transitions. Word has length 60 [2020-10-24 01:08:08,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:08:08,441 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 256 transitions. [2020-10-24 01:08:08,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-24 01:08:08,441 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 256 transitions. [2020-10-24 01:08:08,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-24 01:08:08,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:08:08,443 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:08:08,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-24 01:08:08,443 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:08:08,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:08:08,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1306628089, now seen corresponding path program 1 times [2020-10-24 01:08:08,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:08:08,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166297451] [2020-10-24 01:08:08,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:08:08,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:09,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:08:09,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:09,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:08:09,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166297451] [2020-10-24 01:08:09,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:08:09,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-10-24 01:08:09,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830886186] [2020-10-24 01:08:09,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-24 01:08:09,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:08:09,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-24 01:08:09,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-10-24 01:08:09,206 INFO L87 Difference]: Start difference. First operand 229 states and 256 transitions. Second operand 16 states. [2020-10-24 01:08:13,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:08:13,510 INFO L93 Difference]: Finished difference Result 631 states and 711 transitions. [2020-10-24 01:08:13,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-24 01:08:13,511 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 60 [2020-10-24 01:08:13,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:08:13,518 INFO L225 Difference]: With dead ends: 631 [2020-10-24 01:08:13,518 INFO L226 Difference]: Without dead ends: 626 [2020-10-24 01:08:13,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=470, Invalid=1980, Unknown=0, NotChecked=0, Total=2450 [2020-10-24 01:08:13,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2020-10-24 01:08:13,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 246. [2020-10-24 01:08:13,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-24 01:08:13,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 274 transitions. [2020-10-24 01:08:13,591 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 274 transitions. Word has length 60 [2020-10-24 01:08:13,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:08:13,592 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 274 transitions. [2020-10-24 01:08:13,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-24 01:08:13,592 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 274 transitions. [2020-10-24 01:08:13,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-24 01:08:13,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:08:13,593 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:08:13,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-24 01:08:13,594 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:08:13,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:08:13,594 INFO L82 PathProgramCache]: Analyzing trace with hash 907155636, now seen corresponding path program 1 times [2020-10-24 01:08:13,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:08:13,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887013939] [2020-10-24 01:08:13,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:08:13,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:13,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:08:13,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:13,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:08:13,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887013939] [2020-10-24 01:08:13,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:08:13,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-24 01:08:13,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559838562] [2020-10-24 01:08:13,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-24 01:08:13,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:08:13,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-24 01:08:13,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-24 01:08:13,687 INFO L87 Difference]: Start difference. First operand 246 states and 274 transitions. Second operand 4 states. [2020-10-24 01:08:14,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:08:14,111 INFO L93 Difference]: Finished difference Result 254 states and 282 transitions. [2020-10-24 01:08:14,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-24 01:08:14,112 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2020-10-24 01:08:14,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:08:14,114 INFO L225 Difference]: With dead ends: 254 [2020-10-24 01:08:14,114 INFO L226 Difference]: Without dead ends: 247 [2020-10-24 01:08:14,115 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 [2020-10-24 01:08:14,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-10-24 01:08:14,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2020-10-24 01:08:14,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-10-24 01:08:14,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 275 transitions. [2020-10-24 01:08:14,166 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 275 transitions. Word has length 62 [2020-10-24 01:08:14,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:08:14,166 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 275 transitions. [2020-10-24 01:08:14,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-24 01:08:14,167 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 275 transitions. [2020-10-24 01:08:14,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-24 01:08:14,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:08:14,168 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:08:14,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-24 01:08:14,169 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:08:14,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:08:14,169 INFO L82 PathProgramCache]: Analyzing trace with hash 2063195505, now seen corresponding path program 1 times [2020-10-24 01:08:14,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:08:14,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2006483392] [2020-10-24 01:08:14,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:08:14,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:14,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 01:08:14,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 01:08:14,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 01:08:14,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2006483392] [2020-10-24 01:08:14,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 01:08:14,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-24 01:08:14,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672709154] [2020-10-24 01:08:14,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-24 01:08:14,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 01:08:14,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-24 01:08:14,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-24 01:08:14,299 INFO L87 Difference]: Start difference. First operand 247 states and 275 transitions. Second operand 8 states. [2020-10-24 01:08:15,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 01:08:15,049 INFO L93 Difference]: Finished difference Result 269 states and 298 transitions. [2020-10-24 01:08:15,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-24 01:08:15,049 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 64 [2020-10-24 01:08:15,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 01:08:15,051 INFO L225 Difference]: With dead ends: 269 [2020-10-24 01:08:15,051 INFO L226 Difference]: Without dead ends: 262 [2020-10-24 01:08:15,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-10-24 01:08:15,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-24 01:08:15,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 242. [2020-10-24 01:08:15,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-24 01:08:15,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 269 transitions. [2020-10-24 01:08:15,111 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 269 transitions. Word has length 64 [2020-10-24 01:08:15,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 01:08:15,112 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 269 transitions. [2020-10-24 01:08:15,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-24 01:08:15,112 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 269 transitions. [2020-10-24 01:08:15,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-24 01:08:15,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 01:08:15,114 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 01:08:15,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-24 01:08:15,114 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 01:08:15,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 01:08:15,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1588921325, now seen corresponding path program 1 times [2020-10-24 01:08:15,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 01:08:15,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [523003535] [2020-10-24 01:08:15,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 01:08:15,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 01:08:15,140 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 01:08:15,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 01:08:15,164 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 01:08:15,211 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-24 01:08:15,211 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 01:08:15,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-24 01:08:15,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 01:08:15 BoogieIcfgContainer [2020-10-24 01:08:15,276 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 01:08:15,279 INFO L168 Benchmark]: Toolchain (without parser) took 18799.03 ms. Allocated memory was 125.8 MB in the beginning and 314.6 MB in the end (delta: 188.7 MB). Free memory was 101.4 MB in the beginning and 257.8 MB in the end (delta: -156.4 MB). Peak memory consumption was 33.0 MB. Max. memory is 8.0 GB. [2020-10-24 01:08:15,280 INFO L168 Benchmark]: CDTParser took 0.38 ms. Allocated memory is still 125.8 MB. Free memory was 102.6 MB in the beginning and 102.5 MB in the end (delta: 131.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-24 01:08:15,281 INFO L168 Benchmark]: CACSL2BoogieTranslator took 672.95 ms. Allocated memory is still 125.8 MB. Free memory was 100.8 MB in the beginning and 78.1 MB in the end (delta: 22.7 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-10-24 01:08:15,282 INFO L168 Benchmark]: Boogie Preprocessor took 163.31 ms. Allocated memory was 125.8 MB in the beginning and 151.0 MB in the end (delta: 25.2 MB). Free memory was 78.1 MB in the beginning and 132.4 MB in the end (delta: -54.3 MB). Peak memory consumption was 5.9 MB. Max. memory is 8.0 GB. [2020-10-24 01:08:15,283 INFO L168 Benchmark]: RCFGBuilder took 1171.72 ms. Allocated memory is still 151.0 MB. Free memory was 132.4 MB in the beginning and 111.8 MB in the end (delta: 20.6 MB). Peak memory consumption was 45.7 MB. Max. memory is 8.0 GB. [2020-10-24 01:08:15,284 INFO L168 Benchmark]: TraceAbstraction took 16767.13 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 111.3 MB in the beginning and 257.8 MB in the end (delta: -146.5 MB). Peak memory consumption was 17.0 MB. Max. memory is 8.0 GB. [2020-10-24 01:08:15,287 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38 ms. Allocated memory is still 125.8 MB. Free memory was 102.6 MB in the beginning and 102.5 MB in the end (delta: 131.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 672.95 ms. Allocated memory is still 125.8 MB. Free memory was 100.8 MB in the beginning and 78.1 MB in the end (delta: 22.7 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 163.31 ms. Allocated memory was 125.8 MB in the beginning and 151.0 MB in the end (delta: 25.2 MB). Free memory was 78.1 MB in the beginning and 132.4 MB in the end (delta: -54.3 MB). Peak memory consumption was 5.9 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1171.72 ms. Allocated memory is still 151.0 MB. Free memory was 132.4 MB in the beginning and 111.8 MB in the end (delta: 20.6 MB). Peak memory consumption was 45.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 16767.13 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 111.3 MB in the beginning and 257.8 MB in the end (delta: -146.5 MB). Peak memory consumption was 17.0 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)); VAL [list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1004] list->next = ((void*)0) VAL [list={-1:0}, malloc(sizeof(SLL))={-1:0}] [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()) VAL [__VERIFIER_nondet_int()=0, list={-1:0}, malloc(sizeof(SLL))={-1:0}] [L1006] list->inner = malloc(sizeof(SLL)) VAL [list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1006] EXPR list->inner VAL [list={-1:0}, list->inner={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1006] list->inner->next = ((void*)0) VAL [list={-1:0}, list->inner={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1006] EXPR list->inner VAL [list={-1:0}, list->inner={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1006] list->inner->inner = ((void*)0) VAL [list={-1:0}, list->inner={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1006] EXPR list->inner VAL [list={-1:0}, list->inner={-2:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [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))) 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}] [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()) VAL [__VERIFIER_nondet_int()=0, end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1022] end = ((void*)0) VAL [end={0:0}, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [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 VAL [end={-1:0}, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1030] int len = 0; VAL [end={-1:0}, len=0, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1031] EXPR end->inner VAL [end={-1:0}, end->inner={-2:0}, len=0, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [L1031] SLL* inner = end->inner; VAL [end={-1:0}, end->inner={-2:0}, inner={-2:0}, len=0, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [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 VAL [end={-1:0}, inner={-2:0}, len=0, list={-1:0}, malloc(sizeof(SLL))={-2:0}, malloc(sizeof(SLL))={-1:0}] [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)) 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}] [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) 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] 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, 181 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 16.5s, OverallIterations: 14, TraceHistogramMax: 1, AutomataDifference: 12.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2176 SDtfs, 3307 SDslu, 6171 SDs, 0 SdLazy, 4609 SolverSat, 315 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 181 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 4.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=247occurred in iteration=12, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 13 MinimizatonAttempts, 903 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.3s InterpolantComputationTime, 676 NumberOfCodeBlocks, 676 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 599 ConstructedInterpolants, 0 QuantifiedInterpolants, 199691 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 13 PerfectInterpolantSequences, 1/1 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...