/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/list-ext3-properties/sll_nondet_insert-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 16:42:45,694 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 16:42:45,698 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 16:42:45,725 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 16:42:45,725 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 16:42:45,726 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 16:42:45,728 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 16:42:45,730 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 16:42:45,731 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 16:42:45,732 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 16:42:45,733 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 16:42:45,734 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 16:42:45,735 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 16:42:45,736 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 16:42:45,737 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 16:42:45,738 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 16:42:45,739 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 16:42:45,740 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 16:42:45,742 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 16:42:45,744 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 16:42:45,746 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 16:42:45,747 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 16:42:45,749 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 16:42:45,750 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 16:42:45,752 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-04 16:42:45,753 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-04 16:42:45,753 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-04 16:42:45,754 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-04 16:42:45,755 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-04 16:42:45,756 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-04 16:42:45,756 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 16:42:45,757 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 16:42:45,758 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 16:42:45,759 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 16:42:45,760 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 16:42:45,760 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 16:42:45,761 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 16:42:45,761 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 16:42:45,761 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 16:42:45,762 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 16:42:45,763 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 16:42:45,764 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 16:42:45,776 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 16:42:45,776 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 16:42:45,777 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 16:42:45,780 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 16:42:45,780 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 16:42:45,780 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 16:42:45,781 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 16:42:45,781 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 16:42:45,781 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 16:42:45,781 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 16:42:45,781 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 16:42:45,782 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 16:42:45,782 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 16:42:45,782 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 16:42:45,782 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 16:42:45,782 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 16:42:45,783 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 16:42:45,784 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 16:42:45,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 16:42:45,784 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 16:42:45,784 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 16:42:45,785 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 16:42:45,785 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 16:42:46,258 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 16:42:46,276 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 16:42:46,280 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 16:42:46,282 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 16:42:46,282 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 16:42:46,283 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_nondet_insert-1.i [2020-09-04 16:42:46,366 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e34a70e3f/a2718a08c86b4998bfec6ba5c1c0c9d8/FLAG8023d5270 [2020-09-04 16:42:46,950 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 16:42:46,951 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext3-properties/sll_nondet_insert-1.i [2020-09-04 16:42:46,967 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e34a70e3f/a2718a08c86b4998bfec6ba5c1c0c9d8/FLAG8023d5270 [2020-09-04 16:42:47,202 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e34a70e3f/a2718a08c86b4998bfec6ba5c1c0c9d8 [2020-09-04 16:42:47,216 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 16:42:47,218 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 16:42:47,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 16:42:47,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 16:42:47,224 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 16:42:47,225 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:42:47" (1/1) ... [2020-09-04 16:42:47,229 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@421e6203 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:47, skipping insertion in model container [2020-09-04 16:42:47,230 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:42:47" (1/1) ... [2020-09-04 16:42:47,239 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 16:42:47,296 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 16:42:47,901 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:42:47,914 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 16:42:47,969 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:42:48,027 INFO L208 MainTranslator]: Completed translation [2020-09-04 16:42:48,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:48 WrapperNode [2020-09-04 16:42:48,027 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 16:42:48,028 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 16:42:48,028 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 16:42:48,029 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 16:42:48,047 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:48" (1/1) ... [2020-09-04 16:42:48,047 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:48" (1/1) ... [2020-09-04 16:42:48,067 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:48" (1/1) ... [2020-09-04 16:42:48,067 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:48" (1/1) ... [2020-09-04 16:42:48,084 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:48" (1/1) ... [2020-09-04 16:42:48,092 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:48" (1/1) ... [2020-09-04 16:42:48,096 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:48" (1/1) ... [2020-09-04 16:42:48,104 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 16:42:48,104 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 16:42:48,104 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 16:42:48,105 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 16:42:48,106 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:48" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 16:42:48,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 16:42:48,191 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 16:42:48,191 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-04 16:42:48,191 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-04 16:42:48,191 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-09-04 16:42:48,192 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2020-09-04 16:42:48,192 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2020-09-04 16:42:48,192 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2020-09-04 16:42:48,192 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_insert [2020-09-04 16:42:48,192 INFO L138 BoogieDeclarations]: Found implementation of procedure _get_nondet_int [2020-09-04 16:42:48,193 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 16:42:48,193 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 16:42:48,193 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 16:42:48,193 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-04 16:42:48,194 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-04 16:42:48,194 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-04 16:42:48,194 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-04 16:42:48,194 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-04 16:42:48,194 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-04 16:42:48,195 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-04 16:42:48,195 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-04 16:42:48,195 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-04 16:42:48,196 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-04 16:42:48,196 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-04 16:42:48,196 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-04 16:42:48,196 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-04 16:42:48,196 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-04 16:42:48,196 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-04 16:42:48,197 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-04 16:42:48,197 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-04 16:42:48,197 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-04 16:42:48,197 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-04 16:42:48,197 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-04 16:42:48,198 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-04 16:42:48,198 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-04 16:42:48,198 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-04 16:42:48,198 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-04 16:42:48,198 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-04 16:42:48,198 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-04 16:42:48,199 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-04 16:42:48,199 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-04 16:42:48,199 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-04 16:42:48,199 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-04 16:42:48,199 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-04 16:42:48,200 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-04 16:42:48,200 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-04 16:42:48,200 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-04 16:42:48,200 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-04 16:42:48,200 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-04 16:42:48,200 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-04 16:42:48,201 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-04 16:42:48,201 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-04 16:42:48,201 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-04 16:42:48,201 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-04 16:42:48,201 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-04 16:42:48,201 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-04 16:42:48,202 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-04 16:42:48,202 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-04 16:42:48,202 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-04 16:42:48,202 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-04 16:42:48,202 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-04 16:42:48,202 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-04 16:42:48,203 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-04 16:42:48,203 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-04 16:42:48,203 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-04 16:42:48,203 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-04 16:42:48,203 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-04 16:42:48,203 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-04 16:42:48,204 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-04 16:42:48,204 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-04 16:42:48,204 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-04 16:42:48,204 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-04 16:42:48,204 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-04 16:42:48,204 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-09-04 16:42:48,204 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 16:42:48,205 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-04 16:42:48,205 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-09-04 16:42:48,205 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-04 16:42:48,205 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-04 16:42:48,205 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-09-04 16:42:48,206 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-04 16:42:48,206 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-04 16:42:48,206 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-04 16:42:48,206 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-04 16:42:48,206 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-04 16:42:48,206 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-04 16:42:48,207 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-04 16:42:48,207 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-04 16:42:48,207 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-04 16:42:48,207 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-04 16:42:48,207 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-04 16:42:48,207 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-04 16:42:48,208 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-04 16:42:48,208 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-04 16:42:48,208 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-04 16:42:48,208 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-04 16:42:48,208 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-04 16:42:48,208 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-04 16:42:48,208 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-04 16:42:48,209 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-04 16:42:48,209 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-04 16:42:48,209 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-04 16:42:48,209 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-04 16:42:48,209 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-04 16:42:48,209 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-04 16:42:48,210 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-04 16:42:48,210 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-04 16:42:48,210 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-04 16:42:48,210 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-04 16:42:48,210 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-04 16:42:48,210 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-04 16:42:48,211 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-04 16:42:48,211 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-04 16:42:48,211 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-04 16:42:48,211 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-04 16:42:48,211 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-04 16:42:48,211 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-04 16:42:48,211 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-04 16:42:48,212 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-09-04 16:42:48,212 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2020-09-04 16:42:48,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-04 16:42:48,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-04 16:42:48,212 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2020-09-04 16:42:48,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-04 16:42:48,212 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2020-09-04 16:42:48,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 16:42:48,213 INFO L130 BoogieDeclarations]: Found specification of procedure sll_insert [2020-09-04 16:42:48,213 INFO L130 BoogieDeclarations]: Found specification of procedure _get_nondet_int [2020-09-04 16:42:48,213 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 16:42:48,213 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 16:42:48,213 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-09-04 16:42:48,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 16:42:48,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 16:42:48,578 INFO L732 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-09-04 16:42:48,930 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 16:42:48,931 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-04 16:42:48,937 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:42:48 BoogieIcfgContainer [2020-09-04 16:42:48,938 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 16:42:48,939 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 16:42:48,939 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 16:42:48,943 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 16:42:48,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 04:42:47" (1/3) ... [2020-09-04 16:42:48,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29d36cf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:42:48, skipping insertion in model container [2020-09-04 16:42:48,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:42:48" (2/3) ... [2020-09-04 16:42:48,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29d36cf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:42:48, skipping insertion in model container [2020-09-04 16:42:48,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:42:48" (3/3) ... [2020-09-04 16:42:48,948 INFO L109 eAbstractionObserver]: Analyzing ICFG sll_nondet_insert-1.i [2020-09-04 16:42:48,960 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 16:42:48,972 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 16:42:48,994 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 16:42:49,019 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 16:42:49,019 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 16:42:49,019 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 16:42:49,019 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 16:42:49,020 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 16:42:49,020 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 16:42:49,020 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 16:42:49,020 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 16:42:49,042 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states. [2020-09-04 16:42:49,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-04 16:42:49,059 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:42:49,060 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:42:49,061 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:42:49,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:42:49,069 INFO L82 PathProgramCache]: Analyzing trace with hash 422432984, now seen corresponding path program 1 times [2020-09-04 16:42:49,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:42:49,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911945654] [2020-09-04 16:42:49,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:42:49,167 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:42:49,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:49,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:42:49,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:49,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 16:42:49,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:49,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-04 16:42:49,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:49,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-09-04 16:42:49,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:49,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-09-04 16:42:49,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:49,412 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-04 16:42:49,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911945654] [2020-09-04 16:42:49,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:42:49,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 16:42:49,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92011469] [2020-09-04 16:42:49,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 16:42:49,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:42:49,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 16:42:49,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 16:42:49,449 INFO L87 Difference]: Start difference. First operand 142 states. Second operand 4 states. [2020-09-04 16:42:49,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:42:49,815 INFO L93 Difference]: Finished difference Result 289 states and 337 transitions. [2020-09-04 16:42:49,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 16:42:49,817 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-09-04 16:42:49,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:42:49,833 INFO L225 Difference]: With dead ends: 289 [2020-09-04 16:42:49,833 INFO L226 Difference]: Without dead ends: 123 [2020-09-04 16:42:49,839 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-04 16:42:49,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-04 16:42:49,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 114. [2020-09-04 16:42:49,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-09-04 16:42:49,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 123 transitions. [2020-09-04 16:42:49,911 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 123 transitions. Word has length 54 [2020-09-04 16:42:49,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:42:49,912 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 123 transitions. [2020-09-04 16:42:49,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 16:42:49,912 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 123 transitions. [2020-09-04 16:42:49,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-04 16:42:49,916 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:42:49,917 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:42:49,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 16:42:49,917 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:42:49,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:42:49,918 INFO L82 PathProgramCache]: Analyzing trace with hash 333013349, now seen corresponding path program 1 times [2020-09-04 16:42:49,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:42:49,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1902137536] [2020-09-04 16:42:49,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:42:49,924 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:42:49,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:50,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:42:50,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:50,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 16:42:50,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:50,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-04 16:42:50,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:50,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-04 16:42:50,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:50,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-09-04 16:42:50,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:50,254 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-04 16:42:50,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1902137536] [2020-09-04 16:42:50,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:42:50,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-04 16:42:50,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163587213] [2020-09-04 16:42:50,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 16:42:50,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:42:50,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 16:42:50,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-09-04 16:42:50,259 INFO L87 Difference]: Start difference. First operand 114 states and 123 transitions. Second operand 9 states. [2020-09-04 16:42:51,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:42:51,160 INFO L93 Difference]: Finished difference Result 275 states and 301 transitions. [2020-09-04 16:42:51,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-04 16:42:51,160 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 69 [2020-09-04 16:42:51,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:42:51,163 INFO L225 Difference]: With dead ends: 275 [2020-09-04 16:42:51,164 INFO L226 Difference]: Without dead ends: 169 [2020-09-04 16:42:51,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2020-09-04 16:42:51,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-09-04 16:42:51,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 134. [2020-09-04 16:42:51,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-09-04 16:42:51,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 145 transitions. [2020-09-04 16:42:51,195 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 145 transitions. Word has length 69 [2020-09-04 16:42:51,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:42:51,195 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 145 transitions. [2020-09-04 16:42:51,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 16:42:51,196 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 145 transitions. [2020-09-04 16:42:51,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-04 16:42:51,199 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:42:51,201 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:42:51,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 16:42:51,201 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:42:51,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:42:51,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1735568478, now seen corresponding path program 1 times [2020-09-04 16:42:51,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:42:51,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249151743] [2020-09-04 16:42:51,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:42:51,207 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:42:51,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:51,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:42:51,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:51,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 16:42:51,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:51,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-04 16:42:51,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:51,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-04 16:42:51,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:51,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-09-04 16:42:51,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:51,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:42:51,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249151743] [2020-09-04 16:42:51,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:42:51,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-09-04 16:42:51,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991713845] [2020-09-04 16:42:51,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-04 16:42:51,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:42:51,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-04 16:42:51,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-09-04 16:42:51,445 INFO L87 Difference]: Start difference. First operand 134 states and 145 transitions. Second operand 12 states. [2020-09-04 16:42:52,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:42:52,606 INFO L93 Difference]: Finished difference Result 313 states and 348 transitions. [2020-09-04 16:42:52,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-04 16:42:52,607 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 71 [2020-09-04 16:42:52,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:42:52,610 INFO L225 Difference]: With dead ends: 313 [2020-09-04 16:42:52,610 INFO L226 Difference]: Without dead ends: 206 [2020-09-04 16:42:52,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=527, Unknown=0, NotChecked=0, Total=650 [2020-09-04 16:42:52,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-09-04 16:42:52,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 154. [2020-09-04 16:42:52,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-09-04 16:42:52,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 167 transitions. [2020-09-04 16:42:52,640 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 167 transitions. Word has length 71 [2020-09-04 16:42:52,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:42:52,641 INFO L479 AbstractCegarLoop]: Abstraction has 154 states and 167 transitions. [2020-09-04 16:42:52,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-04 16:42:52,641 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 167 transitions. [2020-09-04 16:42:52,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-04 16:42:52,644 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:42:52,644 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:42:52,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 16:42:52,645 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:42:52,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:42:52,645 INFO L82 PathProgramCache]: Analyzing trace with hash -472966004, now seen corresponding path program 1 times [2020-09-04 16:42:52,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:42:52,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384384445] [2020-09-04 16:42:52,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:42:52,650 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:42:52,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:52,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:42:52,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:52,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 16:42:52,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:52,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-04 16:42:52,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:52,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-04 16:42:52,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:52,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-09-04 16:42:52,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:52,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:42:52,971 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384384445] [2020-09-04 16:42:52,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:42:52,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-09-04 16:42:52,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88088871] [2020-09-04 16:42:52,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-04 16:42:52,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:42:52,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-04 16:42:52,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-09-04 16:42:52,973 INFO L87 Difference]: Start difference. First operand 154 states and 167 transitions. Second operand 11 states. [2020-09-04 16:42:54,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:42:54,723 INFO L93 Difference]: Finished difference Result 342 states and 375 transitions. [2020-09-04 16:42:54,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-04 16:42:54,724 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 79 [2020-09-04 16:42:54,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:42:54,726 INFO L225 Difference]: With dead ends: 342 [2020-09-04 16:42:54,726 INFO L226 Difference]: Without dead ends: 204 [2020-09-04 16:42:54,728 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=224, Invalid=478, Unknown=0, NotChecked=0, Total=702 [2020-09-04 16:42:54,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-09-04 16:42:54,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 161. [2020-09-04 16:42:54,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-09-04 16:42:54,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 174 transitions. [2020-09-04 16:42:54,755 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 174 transitions. Word has length 79 [2020-09-04 16:42:54,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:42:54,755 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 174 transitions. [2020-09-04 16:42:54,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-04 16:42:54,755 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 174 transitions. [2020-09-04 16:42:54,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-09-04 16:42:54,757 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:42:54,758 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:42:54,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 16:42:54,758 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:42:54,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:42:54,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1820928426, now seen corresponding path program 1 times [2020-09-04 16:42:54,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:42:54,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880671103] [2020-09-04 16:42:54,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:42:54,763 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:42:54,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:54,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:42:54,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:54,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 16:42:54,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:54,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-04 16:42:54,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:55,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-09-04 16:42:55,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:55,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-09-04 16:42:55,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:55,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:42:55,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880671103] [2020-09-04 16:42:55,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:42:55,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-09-04 16:42:55,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029643989] [2020-09-04 16:42:55,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-04 16:42:55,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:42:55,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-04 16:42:55,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2020-09-04 16:42:55,038 INFO L87 Difference]: Start difference. First operand 161 states and 174 transitions. Second operand 14 states. [2020-09-04 16:42:56,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:42:56,418 INFO L93 Difference]: Finished difference Result 307 states and 339 transitions. [2020-09-04 16:42:56,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-04 16:42:56,420 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2020-09-04 16:42:56,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:42:56,422 INFO L225 Difference]: With dead ends: 307 [2020-09-04 16:42:56,423 INFO L226 Difference]: Without dead ends: 221 [2020-09-04 16:42:56,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=160, Invalid=770, Unknown=0, NotChecked=0, Total=930 [2020-09-04 16:42:56,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-09-04 16:42:56,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 170. [2020-09-04 16:42:56,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-09-04 16:42:56,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 184 transitions. [2020-09-04 16:42:56,448 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 184 transitions. Word has length 80 [2020-09-04 16:42:56,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:42:56,448 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 184 transitions. [2020-09-04 16:42:56,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-04 16:42:56,449 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 184 transitions. [2020-09-04 16:42:56,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-09-04 16:42:56,450 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:42:56,451 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:42:56,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 16:42:56,451 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:42:56,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:42:56,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1107353865, now seen corresponding path program 2 times [2020-09-04 16:42:56,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:42:56,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1712872885] [2020-09-04 16:42:56,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:42:56,455 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:42:56,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:56,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:42:56,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:56,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 16:42:56,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:56,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-04 16:42:56,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:56,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-04 16:42:56,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:56,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-09-04 16:42:56,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:56,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:42:56,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1712872885] [2020-09-04 16:42:56,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:42:56,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-09-04 16:42:56,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312354452] [2020-09-04 16:42:56,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-04 16:42:56,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:42:56,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-04 16:42:56,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-09-04 16:42:56,736 INFO L87 Difference]: Start difference. First operand 170 states and 184 transitions. Second operand 14 states. [2020-09-04 16:42:58,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:42:58,437 INFO L93 Difference]: Finished difference Result 306 states and 337 transitions. [2020-09-04 16:42:58,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-04 16:42:58,437 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2020-09-04 16:42:58,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:42:58,439 INFO L225 Difference]: With dead ends: 306 [2020-09-04 16:42:58,440 INFO L226 Difference]: Without dead ends: 216 [2020-09-04 16:42:58,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2020-09-04 16:42:58,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-09-04 16:42:58,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 170. [2020-09-04 16:42:58,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-09-04 16:42:58,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 183 transitions. [2020-09-04 16:42:58,462 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 183 transitions. Word has length 81 [2020-09-04 16:42:58,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:42:58,462 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 183 transitions. [2020-09-04 16:42:58,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-04 16:42:58,462 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 183 transitions. [2020-09-04 16:42:58,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-09-04 16:42:58,463 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:42:58,464 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:42:58,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 16:42:58,464 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:42:58,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:42:58,464 INFO L82 PathProgramCache]: Analyzing trace with hash -574415326, now seen corresponding path program 2 times [2020-09-04 16:42:58,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:42:58,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519334974] [2020-09-04 16:42:58,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:42:58,468 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:42:58,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:58,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:42:58,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:58,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 16:42:58,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:58,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-04 16:42:58,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:58,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-09-04 16:42:58,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:58,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-09-04 16:42:58,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:58,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:42:58,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519334974] [2020-09-04 16:42:58,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:42:58,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-09-04 16:42:58,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105551714] [2020-09-04 16:42:58,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-04 16:42:58,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:42:58,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-04 16:42:58,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-09-04 16:42:58,780 INFO L87 Difference]: Start difference. First operand 170 states and 183 transitions. Second operand 13 states. [2020-09-04 16:42:59,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:42:59,588 INFO L93 Difference]: Finished difference Result 207 states and 225 transitions. [2020-09-04 16:42:59,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-04 16:42:59,589 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 89 [2020-09-04 16:42:59,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:42:59,591 INFO L225 Difference]: With dead ends: 207 [2020-09-04 16:42:59,592 INFO L226 Difference]: Without dead ends: 201 [2020-09-04 16:42:59,592 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2020-09-04 16:42:59,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-09-04 16:42:59,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 183. [2020-09-04 16:42:59,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-09-04 16:42:59,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 200 transitions. [2020-09-04 16:42:59,615 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 200 transitions. Word has length 89 [2020-09-04 16:42:59,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:42:59,615 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 200 transitions. [2020-09-04 16:42:59,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-04 16:42:59,616 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 200 transitions. [2020-09-04 16:42:59,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-09-04 16:42:59,617 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:42:59,617 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:42:59,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 16:42:59,618 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:42:59,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:42:59,618 INFO L82 PathProgramCache]: Analyzing trace with hash 263120297, now seen corresponding path program 1 times [2020-09-04 16:42:59,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:42:59,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404680390] [2020-09-04 16:42:59,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:42:59,655 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:42:59,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:59,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:42:59,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:59,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 16:42:59,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:59,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-04 16:42:59,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:59,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-09-04 16:42:59,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:42:59,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-09-04 16:42:59,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:43:00,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:43:00,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404680390] [2020-09-04 16:43:00,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:43:00,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-09-04 16:43:00,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833729331] [2020-09-04 16:43:00,025 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-04 16:43:00,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:43:00,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-04 16:43:00,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-09-04 16:43:00,026 INFO L87 Difference]: Start difference. First operand 183 states and 200 transitions. Second operand 18 states. [2020-09-04 16:43:01,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:43:01,414 INFO L93 Difference]: Finished difference Result 239 states and 263 transitions. [2020-09-04 16:43:01,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-04 16:43:01,416 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 96 [2020-09-04 16:43:01,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:43:01,419 INFO L225 Difference]: With dead ends: 239 [2020-09-04 16:43:01,419 INFO L226 Difference]: Without dead ends: 233 [2020-09-04 16:43:01,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=169, Invalid=1021, Unknown=0, NotChecked=0, Total=1190 [2020-09-04 16:43:01,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-09-04 16:43:01,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 209. [2020-09-04 16:43:01,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-09-04 16:43:01,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 232 transitions. [2020-09-04 16:43:01,446 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 232 transitions. Word has length 96 [2020-09-04 16:43:01,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:43:01,446 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 232 transitions. [2020-09-04 16:43:01,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-04 16:43:01,446 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 232 transitions. [2020-09-04 16:43:01,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-09-04 16:43:01,448 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:43:01,448 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:43:01,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 16:43:01,449 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:43:01,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:43:01,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1940597340, now seen corresponding path program 1 times [2020-09-04 16:43:01,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:43:01,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872791407] [2020-09-04 16:43:01,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:43:01,466 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:43:01,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:43:01,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:43:01,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:43:01,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 16:43:01,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:43:01,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-04 16:43:01,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:43:01,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-09-04 16:43:01,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:43:01,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-09-04 16:43:01,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:43:01,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:43:01,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872791407] [2020-09-04 16:43:01,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:43:01,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2020-09-04 16:43:01,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608468451] [2020-09-04 16:43:01,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-04 16:43:01,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:43:01,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-04 16:43:01,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2020-09-04 16:43:01,767 INFO L87 Difference]: Start difference. First operand 209 states and 232 transitions. Second operand 16 states. [2020-09-04 16:43:03,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:43:03,551 INFO L93 Difference]: Finished difference Result 358 states and 404 transitions. [2020-09-04 16:43:03,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-04 16:43:03,552 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 97 [2020-09-04 16:43:03,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:43:03,559 INFO L225 Difference]: With dead ends: 358 [2020-09-04 16:43:03,559 INFO L226 Difference]: Without dead ends: 245 [2020-09-04 16:43:03,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2020-09-04 16:43:03,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-09-04 16:43:03,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 176. [2020-09-04 16:43:03,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-09-04 16:43:03,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 192 transitions. [2020-09-04 16:43:03,596 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 192 transitions. Word has length 97 [2020-09-04 16:43:03,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:43:03,597 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 192 transitions. [2020-09-04 16:43:03,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-04 16:43:03,597 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 192 transitions. [2020-09-04 16:43:03,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-09-04 16:43:03,598 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:43:03,599 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:43:03,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-04 16:43:03,599 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:43:03,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:43:03,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1056708542, now seen corresponding path program 2 times [2020-09-04 16:43:03,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:43:03,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753270281] [2020-09-04 16:43:03,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:43:03,609 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:43:03,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:43:03,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:43:03,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:43:03,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 16:43:03,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:43:03,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-04 16:43:03,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:43:03,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-09-04 16:43:03,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:43:03,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-09-04 16:43:03,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:43:03,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:43:03,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [753270281] [2020-09-04 16:43:03,859 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:43:03,859 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-09-04 16:43:03,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407366608] [2020-09-04 16:43:03,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-04 16:43:03,860 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:43:03,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-04 16:43:03,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-09-04 16:43:03,860 INFO L87 Difference]: Start difference. First operand 176 states and 192 transitions. Second operand 13 states. [2020-09-04 16:43:05,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:43:05,191 INFO L93 Difference]: Finished difference Result 369 states and 420 transitions. [2020-09-04 16:43:05,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-04 16:43:05,192 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 103 [2020-09-04 16:43:05,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:43:05,194 INFO L225 Difference]: With dead ends: 369 [2020-09-04 16:43:05,194 INFO L226 Difference]: Without dead ends: 266 [2020-09-04 16:43:05,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=211, Invalid=659, Unknown=0, NotChecked=0, Total=870 [2020-09-04 16:43:05,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-09-04 16:43:05,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 206. [2020-09-04 16:43:05,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-09-04 16:43:05,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 228 transitions. [2020-09-04 16:43:05,229 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 228 transitions. Word has length 103 [2020-09-04 16:43:05,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:43:05,229 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 228 transitions. [2020-09-04 16:43:05,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-04 16:43:05,230 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 228 transitions. [2020-09-04 16:43:05,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-09-04 16:43:05,232 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:43:05,232 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:43:05,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-04 16:43:05,232 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:43:05,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:43:05,233 INFO L82 PathProgramCache]: Analyzing trace with hash 2144765375, now seen corresponding path program 1 times [2020-09-04 16:43:05,233 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:43:05,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535768304] [2020-09-04 16:43:05,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:43:05,256 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:43:05,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:43:05,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:43:05,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:43:05,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 16:43:05,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:43:05,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-04 16:43:05,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:43:05,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-09-04 16:43:05,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:43:05,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-04 16:43:05,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:43:05,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:43:05,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535768304] [2020-09-04 16:43:05,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:43:05,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2020-09-04 16:43:05,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764481724] [2020-09-04 16:43:05,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-04 16:43:05,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:43:05,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-04 16:43:05,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2020-09-04 16:43:05,746 INFO L87 Difference]: Start difference. First operand 206 states and 228 transitions. Second operand 20 states. [2020-09-04 16:43:08,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:43:08,050 INFO L93 Difference]: Finished difference Result 325 states and 381 transitions. [2020-09-04 16:43:08,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-04 16:43:08,055 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 105 [2020-09-04 16:43:08,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:43:08,057 INFO L225 Difference]: With dead ends: 325 [2020-09-04 16:43:08,057 INFO L226 Difference]: Without dead ends: 319 [2020-09-04 16:43:08,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=209, Invalid=1513, Unknown=0, NotChecked=0, Total=1722 [2020-09-04 16:43:08,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2020-09-04 16:43:08,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 256. [2020-09-04 16:43:08,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-09-04 16:43:08,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 294 transitions. [2020-09-04 16:43:08,099 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 294 transitions. Word has length 105 [2020-09-04 16:43:08,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:43:08,099 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 294 transitions. [2020-09-04 16:43:08,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-04 16:43:08,099 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 294 transitions. [2020-09-04 16:43:08,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-09-04 16:43:08,102 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:43:08,102 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:43:08,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-04 16:43:08,102 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:43:08,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:43:08,103 INFO L82 PathProgramCache]: Analyzing trace with hash -798874772, now seen corresponding path program 2 times [2020-09-04 16:43:08,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:43:08,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406275704] [2020-09-04 16:43:08,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:43:08,115 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:43:08,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:43:08,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:43:08,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:43:08,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 16:43:08,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:43:08,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-04 16:43:08,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:43:08,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-09-04 16:43:08,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:43:08,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-09-04 16:43:08,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:43:08,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:43:08,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406275704] [2020-09-04 16:43:08,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:43:08,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-09-04 16:43:08,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158121171] [2020-09-04 16:43:08,851 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-04 16:43:08,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:43:08,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-04 16:43:08,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2020-09-04 16:43:08,852 INFO L87 Difference]: Start difference. First operand 256 states and 294 transitions. Second operand 23 states. [2020-09-04 16:43:11,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:43:11,572 INFO L93 Difference]: Finished difference Result 340 states and 399 transitions. [2020-09-04 16:43:11,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-04 16:43:11,573 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 112 [2020-09-04 16:43:11,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:43:11,577 INFO L225 Difference]: With dead ends: 340 [2020-09-04 16:43:11,577 INFO L226 Difference]: Without dead ends: 330 [2020-09-04 16:43:11,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=172, Invalid=1720, Unknown=0, NotChecked=0, Total=1892 [2020-09-04 16:43:11,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-09-04 16:43:11,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 297. [2020-09-04 16:43:11,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-09-04 16:43:11,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 346 transitions. [2020-09-04 16:43:11,622 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 346 transitions. Word has length 112 [2020-09-04 16:43:11,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:43:11,623 INFO L479 AbstractCegarLoop]: Abstraction has 297 states and 346 transitions. [2020-09-04 16:43:11,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-04 16:43:11,623 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 346 transitions. [2020-09-04 16:43:11,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-09-04 16:43:11,625 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:43:11,626 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:43:11,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-04 16:43:11,626 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:43:11,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:43:11,627 INFO L82 PathProgramCache]: Analyzing trace with hash -861453783, now seen corresponding path program 2 times [2020-09-04 16:43:11,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:43:11,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [598339997] [2020-09-04 16:43:11,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:43:11,634 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:43:11,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:43:11,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:43:11,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:43:11,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 16:43:11,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:43:11,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-04 16:43:11,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:43:11,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-09-04 16:43:11,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:43:11,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-09-04 16:43:11,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:43:11,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:43:11,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [598339997] [2020-09-04 16:43:11,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:43:11,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-09-04 16:43:11,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770036592] [2020-09-04 16:43:11,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 16:43:11,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:43:11,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 16:43:11,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-09-04 16:43:11,902 INFO L87 Difference]: Start difference. First operand 297 states and 346 transitions. Second operand 15 states. [2020-09-04 16:43:12,349 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2020-09-04 16:43:13,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:43:13,755 INFO L93 Difference]: Finished difference Result 542 states and 648 transitions. [2020-09-04 16:43:13,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-04 16:43:13,756 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 113 [2020-09-04 16:43:13,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:43:13,760 INFO L225 Difference]: With dead ends: 542 [2020-09-04 16:43:13,760 INFO L226 Difference]: Without dead ends: 407 [2020-09-04 16:43:13,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=262, Invalid=998, Unknown=0, NotChecked=0, Total=1260 [2020-09-04 16:43:13,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2020-09-04 16:43:13,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 321. [2020-09-04 16:43:13,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 321 states. [2020-09-04 16:43:13,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 380 transitions. [2020-09-04 16:43:13,815 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 380 transitions. Word has length 113 [2020-09-04 16:43:13,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:43:13,815 INFO L479 AbstractCegarLoop]: Abstraction has 321 states and 380 transitions. [2020-09-04 16:43:13,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 16:43:13,815 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 380 transitions. [2020-09-04 16:43:13,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-09-04 16:43:13,818 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:43:13,818 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:43:13,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-04 16:43:13,818 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:43:13,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:43:13,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1389369769, now seen corresponding path program 3 times [2020-09-04 16:43:13,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:43:13,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195438321] [2020-09-04 16:43:13,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:43:13,831 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:43:13,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:43:13,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:43:13,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:43:13,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-04 16:43:13,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:43:14,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-04 16:43:14,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:43:14,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-09-04 16:43:14,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:43:14,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-09-04 16:43:14,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:43:14,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 16:43:14,220 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1195438321] [2020-09-04 16:43:14,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:43:14,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2020-09-04 16:43:14,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356358522] [2020-09-04 16:43:14,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-04 16:43:14,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:43:14,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-04 16:43:14,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2020-09-04 16:43:14,222 INFO L87 Difference]: Start difference. First operand 321 states and 380 transitions. Second operand 18 states. [2020-09-04 16:43:16,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:43:16,397 INFO L93 Difference]: Finished difference Result 536 states and 631 transitions. [2020-09-04 16:43:16,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-04 16:43:16,398 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 113 [2020-09-04 16:43:16,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:43:16,401 INFO L225 Difference]: With dead ends: 536 [2020-09-04 16:43:16,402 INFO L226 Difference]: Without dead ends: 377 [2020-09-04 16:43:16,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=219, Invalid=1263, Unknown=0, NotChecked=0, Total=1482 [2020-09-04 16:43:16,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-09-04 16:43:16,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 318. [2020-09-04 16:43:16,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-09-04 16:43:16,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 371 transitions. [2020-09-04 16:43:16,457 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 371 transitions. Word has length 113 [2020-09-04 16:43:16,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:43:16,457 INFO L479 AbstractCegarLoop]: Abstraction has 318 states and 371 transitions. [2020-09-04 16:43:16,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-04 16:43:16,457 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 371 transitions. [2020-09-04 16:43:16,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-09-04 16:43:16,460 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:43:16,460 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:43:16,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-04 16:43:16,460 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:43:16,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:43:16,461 INFO L82 PathProgramCache]: Analyzing trace with hash 2144590086, now seen corresponding path program 1 times [2020-09-04 16:43:16,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:43:16,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937602677] [2020-09-04 16:43:16,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:43:16,468 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:43:16,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:43:16,491 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:43:16,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:43:16,515 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:43:16,572 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 16:43:16,572 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 16:43:16,573 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-04 16:43:16,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 04:43:16 BoogieIcfgContainer [2020-09-04 16:43:16,617 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 16:43:16,623 INFO L168 Benchmark]: Toolchain (without parser) took 29402.02 ms. Allocated memory was 137.9 MB in the beginning and 500.7 MB in the end (delta: 362.8 MB). Free memory was 99.7 MB in the beginning and 189.7 MB in the end (delta: -90.0 MB). Peak memory consumption was 272.8 MB. Max. memory is 7.1 GB. [2020-09-04 16:43:16,624 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 137.9 MB. Free memory was 119.2 MB in the beginning and 118.8 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-09-04 16:43:16,626 INFO L168 Benchmark]: CACSL2BoogieTranslator took 808.89 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 99.3 MB in the beginning and 166.4 MB in the end (delta: -67.1 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. [2020-09-04 16:43:16,636 INFO L168 Benchmark]: Boogie Preprocessor took 75.65 ms. Allocated memory is still 201.9 MB. Free memory was 166.4 MB in the beginning and 163.4 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. [2020-09-04 16:43:16,637 INFO L168 Benchmark]: RCFGBuilder took 833.52 ms. Allocated memory is still 201.9 MB. Free memory was 163.4 MB in the beginning and 106.2 MB in the end (delta: 57.3 MB). Peak memory consumption was 57.3 MB. Max. memory is 7.1 GB. [2020-09-04 16:43:16,638 INFO L168 Benchmark]: TraceAbstraction took 27678.29 ms. Allocated memory was 201.9 MB in the beginning and 500.7 MB in the end (delta: 298.8 MB). Free memory was 106.2 MB in the beginning and 189.7 MB in the end (delta: -83.6 MB). Peak memory consumption was 215.3 MB. Max. memory is 7.1 GB. [2020-09-04 16:43:16,649 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 137.9 MB. Free memory was 119.2 MB in the beginning and 118.8 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 808.89 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 99.3 MB in the beginning and 166.4 MB in the end (delta: -67.1 MB). Peak memory consumption was 24.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 75.65 ms. Allocated memory is still 201.9 MB. Free memory was 166.4 MB in the beginning and 163.4 MB in the end (delta: 3.0 MB). Peak memory consumption was 3.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 833.52 ms. Allocated memory is still 201.9 MB. Free memory was 163.4 MB in the beginning and 106.2 MB in the end (delta: 57.3 MB). Peak memory consumption was 57.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 27678.29 ms. Allocated memory was 201.9 MB in the beginning and 500.7 MB in the end (delta: 298.8 MB). Free memory was 106.2 MB in the beginning and 189.7 MB in the end (delta: -83.6 MB). Peak memory consumption was 215.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 630]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L616] CALL, EXPR _get_nondet_int(2, 5) [L609] int len = from; [L610] len < until && __VERIFIER_nondet_int() [L610] len < until && __VERIFIER_nondet_int() [L610] COND FALSE !(len < until && __VERIFIER_nondet_int()) [L613] return len; [L616] RET, EXPR _get_nondet_int(2, 5) [L616] const int len = _get_nondet_int(2, 5); [L617] SLL s = sll_create(len); [L617] CALL, EXPR sll_create(len) [L564] SLL head = ((void *)0); [L565] EXPR len-- [L565] COND TRUE len-- > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); [L567] COND FALSE !(((void *)0) == new_head) [L570] new_head->next = head [L571] head = new_head [L565] EXPR len-- [L565] COND TRUE len-- > 0 [L566] SLL new_head = (SLL) malloc(sizeof(struct node)); [L567] COND FALSE !(((void *)0) == new_head) [L570] new_head->next = head [L571] head = new_head [L565] EXPR len-- [L565] COND FALSE !(len-- > 0) [L573] return head; [L617] RET, EXPR sll_create(len) [L617] SLL s = sll_create(len); [L618] CALL, EXPR _get_nondet_int(0, len - 1) [L609] int len = from; [L610] len < until && __VERIFIER_nondet_int() [L610] len < until && __VERIFIER_nondet_int() [L610] COND TRUE len < until && __VERIFIER_nondet_int() [L611] len++ [L610] len < until && __VERIFIER_nondet_int() [L610] COND FALSE !(len < until && __VERIFIER_nondet_int()) [L613] return len; [L618] RET, EXPR _get_nondet_int(0, len - 1) [L618] const int k = _get_nondet_int(0, len - 1); [L619] int i = 0; [L620] i < k && __VERIFIER_nondet_int() [L620] i < k && __VERIFIER_nondet_int() [L620] COND FALSE !(i < k && __VERIFIER_nondet_int()) [L625] EXPR \read(s) [L625] CALL, EXPR sll_length(s) [L576] int len = 0; [L577] COND TRUE \read(head) [L578] len++ [L579] EXPR head->next [L579] head = head->next [L577] COND TRUE \read(head) [L578] len++ [L579] EXPR head->next [L579] head = head->next [L577] COND FALSE !(\read(head)) [L581] return len; [L625] RET, EXPR sll_length(s) [L625] COND TRUE k + len != sll_length(s) [L630] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 153 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 27.5s, OverallIterations: 15, TraceHistogramMax: 3, AutomataDifference: 21.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1930 SDtfs, 4100 SDslu, 11476 SDs, 0 SdLazy, 12874 SolverSat, 560 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 9.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 589 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 394 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1761 ImplicationChecksByTransitivity, 10.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=321occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 14 MinimizatonAttempts, 648 StatesRemovedByMinimization, 14 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...