/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/heap-manipulation/merge_sort-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 16:37:41,607 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 16:37:41,612 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 16:37:41,665 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 16:37:41,666 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 16:37:41,677 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 16:37:41,679 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 16:37:41,683 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 16:37:41,687 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 16:37:41,692 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 16:37:41,693 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 16:37:41,696 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 16:37:41,696 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 16:37:41,700 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 16:37:41,703 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 16:37:41,705 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 16:37:41,707 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 16:37:41,709 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 16:37:41,711 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 16:37:41,719 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 16:37:41,723 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 16:37:41,724 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 16:37:41,725 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 16:37:41,727 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 16:37:41,733 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-04 16:37:41,733 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-04 16:37:41,733 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-04 16:37:41,737 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-04 16:37:41,738 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-04 16:37:41,740 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-04 16:37:41,740 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 16:37:41,741 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 16:37:41,742 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 16:37:41,743 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 16:37:41,744 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 16:37:41,745 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 16:37:41,746 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 16:37:41,746 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 16:37:41,747 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 16:37:41,748 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 16:37:41,749 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 16:37:41,750 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 16:37:41,765 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 16:37:41,765 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 16:37:41,767 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 16:37:41,767 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 16:37:41,767 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 16:37:41,768 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 16:37:41,768 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 16:37:41,768 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 16:37:41,768 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 16:37:41,768 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 16:37:41,769 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 16:37:41,769 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 16:37:41,769 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 16:37:41,769 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 16:37:41,770 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 16:37:41,770 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 16:37:41,770 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 16:37:41,770 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 16:37:41,770 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 16:37:41,771 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 16:37:41,771 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 16:37:41,771 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 16:37:41,771 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 16:37:42,204 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 16:37:42,221 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 16:37:42,228 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 16:37:42,231 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 16:37:42,234 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 16:37:42,235 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/merge_sort-1.i [2020-09-04 16:37:42,317 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7d32889db/24998bc2db90415ea8e3162b108c7cb2/FLAGde1911bf1 [2020-09-04 16:37:43,091 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 16:37:43,092 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/heap-manipulation/merge_sort-1.i [2020-09-04 16:37:43,107 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7d32889db/24998bc2db90415ea8e3162b108c7cb2/FLAGde1911bf1 [2020-09-04 16:37:43,288 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7d32889db/24998bc2db90415ea8e3162b108c7cb2 [2020-09-04 16:37:43,303 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 16:37:43,306 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 16:37:43,307 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 16:37:43,308 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 16:37:43,312 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 16:37:43,314 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:37:43" (1/1) ... [2020-09-04 16:37:43,319 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14fb4a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:37:43, skipping insertion in model container [2020-09-04 16:37:43,319 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 04:37:43" (1/1) ... [2020-09-04 16:37:43,330 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 16:37:43,381 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 16:37:43,933 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:37:43,951 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 16:37:44,027 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 16:37:44,087 INFO L208 MainTranslator]: Completed translation [2020-09-04 16:37:44,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:37:44 WrapperNode [2020-09-04 16:37:44,088 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 16:37:44,088 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 16:37:44,089 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 16:37:44,089 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 16:37:44,107 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:37:44" (1/1) ... [2020-09-04 16:37:44,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:37:44" (1/1) ... [2020-09-04 16:37:44,130 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:37:44" (1/1) ... [2020-09-04 16:37:44,131 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:37:44" (1/1) ... [2020-09-04 16:37:44,159 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:37:44" (1/1) ... [2020-09-04 16:37:44,173 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:37:44" (1/1) ... [2020-09-04 16:37:44,178 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:37:44" (1/1) ... [2020-09-04 16:37:44,187 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 16:37:44,188 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 16:37:44,188 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 16:37:44,188 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 16:37:44,189 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:37:44" (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 16:37:44,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 16:37:44,274 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 16:37:44,275 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-09-04 16:37:44,275 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-09-04 16:37:44,275 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-09-04 16:37:44,275 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_single_node [2020-09-04 16:37:44,275 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_pair [2020-09-04 16:37:44,276 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_sort_core [2020-09-04 16:37:44,276 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_before [2020-09-04 16:37:44,276 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_after [2020-09-04 16:37:44,276 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 16:37:44,276 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 16:37:44,277 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-09-04 16:37:44,277 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-09-04 16:37:44,277 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-09-04 16:37:44,277 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-09-04 16:37:44,277 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-09-04 16:37:44,278 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-09-04 16:37:44,278 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-09-04 16:37:44,278 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-09-04 16:37:44,278 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-09-04 16:37:44,279 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-09-04 16:37:44,279 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-09-04 16:37:44,279 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-09-04 16:37:44,279 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-09-04 16:37:44,279 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-09-04 16:37:44,280 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-09-04 16:37:44,280 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-09-04 16:37:44,280 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-09-04 16:37:44,280 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-09-04 16:37:44,280 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-09-04 16:37:44,280 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-09-04 16:37:44,281 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-09-04 16:37:44,281 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-09-04 16:37:44,281 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-09-04 16:37:44,281 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-09-04 16:37:44,281 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-09-04 16:37:44,281 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-09-04 16:37:44,282 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-09-04 16:37:44,282 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-09-04 16:37:44,282 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-09-04 16:37:44,282 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-09-04 16:37:44,282 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-09-04 16:37:44,283 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-09-04 16:37:44,283 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-09-04 16:37:44,283 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-09-04 16:37:44,283 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-09-04 16:37:44,283 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-09-04 16:37:44,283 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-09-04 16:37:44,283 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-09-04 16:37:44,284 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-09-04 16:37:44,284 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-09-04 16:37:44,284 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-09-04 16:37:44,284 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-09-04 16:37:44,284 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-09-04 16:37:44,284 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-09-04 16:37:44,285 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-09-04 16:37:44,285 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-09-04 16:37:44,285 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-09-04 16:37:44,285 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-09-04 16:37:44,285 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-09-04 16:37:44,285 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-09-04 16:37:44,285 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-09-04 16:37:44,286 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-09-04 16:37:44,286 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-04 16:37:44,286 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-09-04 16:37:44,286 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-09-04 16:37:44,286 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-09-04 16:37:44,286 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-09-04 16:37:44,286 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-09-04 16:37:44,287 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-09-04 16:37:44,287 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-09-04 16:37:44,287 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 16:37:44,287 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-09-04 16:37:44,287 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-09-04 16:37:44,287 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-09-04 16:37:44,288 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-09-04 16:37:44,288 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-09-04 16:37:44,288 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-09-04 16:37:44,288 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-09-04 16:37:44,288 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-09-04 16:37:44,289 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-09-04 16:37:44,289 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-09-04 16:37:44,289 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-09-04 16:37:44,289 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-09-04 16:37:44,289 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-09-04 16:37:44,289 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-09-04 16:37:44,290 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-09-04 16:37:44,290 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-09-04 16:37:44,290 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-09-04 16:37:44,290 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-09-04 16:37:44,290 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-09-04 16:37:44,290 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-09-04 16:37:44,291 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-09-04 16:37:44,291 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-09-04 16:37:44,291 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-09-04 16:37:44,291 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-09-04 16:37:44,291 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-09-04 16:37:44,291 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-09-04 16:37:44,291 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-09-04 16:37:44,292 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-09-04 16:37:44,292 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-09-04 16:37:44,292 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-09-04 16:37:44,292 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-09-04 16:37:44,292 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-09-04 16:37:44,292 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-09-04 16:37:44,293 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-09-04 16:37:44,293 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-09-04 16:37:44,293 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-09-04 16:37:44,293 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-09-04 16:37:44,293 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-09-04 16:37:44,293 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-09-04 16:37:44,293 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-09-04 16:37:44,293 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-09-04 16:37:44,294 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 16:37:44,294 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-09-04 16:37:44,294 INFO L130 BoogieDeclarations]: Found specification of procedure merge_single_node [2020-09-04 16:37:44,294 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-04 16:37:44,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-04 16:37:44,294 INFO L130 BoogieDeclarations]: Found specification of procedure merge_pair [2020-09-04 16:37:44,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 16:37:44,295 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 16:37:44,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 16:37:44,295 INFO L130 BoogieDeclarations]: Found specification of procedure seq_sort_core [2020-09-04 16:37:44,295 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_before [2020-09-04 16:37:44,295 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_after [2020-09-04 16:37:44,296 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 16:37:44,296 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-04 16:37:44,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 16:37:44,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 16:37:44,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 16:37:45,245 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 16:37:45,245 INFO L295 CfgBuilder]: Removed 33 assume(true) statements. [2020-09-04 16:37:45,252 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:37:45 BoogieIcfgContainer [2020-09-04 16:37:45,252 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 16:37:45,254 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 16:37:45,254 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 16:37:45,258 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 16:37:45,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 04:37:43" (1/3) ... [2020-09-04 16:37:45,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@275f9a57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:37:45, skipping insertion in model container [2020-09-04 16:37:45,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 04:37:44" (2/3) ... [2020-09-04 16:37:45,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@275f9a57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 04:37:45, skipping insertion in model container [2020-09-04 16:37:45,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 04:37:45" (3/3) ... [2020-09-04 16:37:45,263 INFO L109 eAbstractionObserver]: Analyzing ICFG merge_sort-1.i [2020-09-04 16:37:45,275 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 16:37:45,287 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 16:37:45,310 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 16:37:45,338 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 16:37:45,338 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 16:37:45,338 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 16:37:45,338 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 16:37:45,338 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 16:37:45,338 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 16:37:45,339 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 16:37:45,339 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 16:37:45,362 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states. [2020-09-04 16:37:45,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-04 16:37:45,379 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:37:45,380 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:37:45,381 INFO L427 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:37:45,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:37:45,389 INFO L82 PathProgramCache]: Analyzing trace with hash -2091922853, now seen corresponding path program 1 times [2020-09-04 16:37:45,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:37:45,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304703921] [2020-09-04 16:37:45,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:37:45,493 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:37:45,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:37:45,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:37:45,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:37:45,645 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 16:37:45,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304703921] [2020-09-04 16:37:45,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:37:45,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 16:37:45,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363221863] [2020-09-04 16:37:45,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 16:37:45,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:37:45,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 16:37:45,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:37:45,683 INFO L87 Difference]: Start difference. First operand 248 states. Second operand 3 states. [2020-09-04 16:37:46,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:37:46,203 INFO L93 Difference]: Finished difference Result 521 states and 689 transitions. [2020-09-04 16:37:46,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 16:37:46,205 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-09-04 16:37:46,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:37:46,224 INFO L225 Difference]: With dead ends: 521 [2020-09-04 16:37:46,225 INFO L226 Difference]: Without dead ends: 252 [2020-09-04 16:37:46,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 16:37:46,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-09-04 16:37:46,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 224. [2020-09-04 16:37:46,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-09-04 16:37:46,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 247 transitions. [2020-09-04 16:37:46,339 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 247 transitions. Word has length 15 [2020-09-04 16:37:46,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:37:46,340 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 247 transitions. [2020-09-04 16:37:46,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 16:37:46,340 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 247 transitions. [2020-09-04 16:37:46,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-04 16:37:46,341 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:37:46,341 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 16:37:46,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 16:37:46,342 INFO L427 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:37:46,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:37:46,343 INFO L82 PathProgramCache]: Analyzing trace with hash 2028933562, now seen corresponding path program 1 times [2020-09-04 16:37:46,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:37:46,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975572412] [2020-09-04 16:37:46,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:37:46,350 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:37:46,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:37:46,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:37:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:37:46,445 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 16:37:46,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975572412] [2020-09-04 16:37:46,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:37:46,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 16:37:46,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339675214] [2020-09-04 16:37:46,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 16:37:46,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:37:46,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 16:37:46,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 16:37:46,448 INFO L87 Difference]: Start difference. First operand 224 states and 247 transitions. Second operand 4 states. [2020-09-04 16:37:47,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:37:47,013 INFO L93 Difference]: Finished difference Result 453 states and 502 transitions. [2020-09-04 16:37:47,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-04 16:37:47,014 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-09-04 16:37:47,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:37:47,017 INFO L225 Difference]: With dead ends: 453 [2020-09-04 16:37:47,018 INFO L226 Difference]: Without dead ends: 253 [2020-09-04 16:37:47,020 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 16:37:47,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-09-04 16:37:47,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 226. [2020-09-04 16:37:47,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-09-04 16:37:47,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 249 transitions. [2020-09-04 16:37:47,050 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 249 transitions. Word has length 17 [2020-09-04 16:37:47,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:37:47,050 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 249 transitions. [2020-09-04 16:37:47,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 16:37:47,051 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 249 transitions. [2020-09-04 16:37:47,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-04 16:37:47,052 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:37:47,052 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-04 16:37:47,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 16:37:47,052 INFO L427 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:37:47,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:37:47,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1052511289, now seen corresponding path program 1 times [2020-09-04 16:37:47,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:37:47,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171065316] [2020-09-04 16:37:47,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:37:47,105 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:37:47,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:37:47,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:37:47,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:37:47,302 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 16:37:47,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171065316] [2020-09-04 16:37:47,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:37:47,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-09-04 16:37:47,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276942241] [2020-09-04 16:37:47,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 16:37:47,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:37:47,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 16:37:47,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-09-04 16:37:47,304 INFO L87 Difference]: Start difference. First operand 226 states and 249 transitions. Second operand 9 states. [2020-09-04 16:37:48,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:37:48,470 INFO L93 Difference]: Finished difference Result 318 states and 355 transitions. [2020-09-04 16:37:48,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 16:37:48,471 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-09-04 16:37:48,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:37:48,477 INFO L225 Difference]: With dead ends: 318 [2020-09-04 16:37:48,477 INFO L226 Difference]: Without dead ends: 313 [2020-09-04 16:37:48,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-09-04 16:37:48,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-09-04 16:37:48,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 231. [2020-09-04 16:37:48,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-09-04 16:37:48,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 254 transitions. [2020-09-04 16:37:48,517 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 254 transitions. Word has length 33 [2020-09-04 16:37:48,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:37:48,518 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 254 transitions. [2020-09-04 16:37:48,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 16:37:48,518 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 254 transitions. [2020-09-04 16:37:48,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-04 16:37:48,520 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:37:48,520 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-04 16:37:48,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 16:37:48,520 INFO L427 AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:37:48,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:37:48,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1386814406, now seen corresponding path program 1 times [2020-09-04 16:37:48,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:37:48,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [297998564] [2020-09-04 16:37:48,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:37:48,542 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:37:48,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:37:48,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:37:48,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:37:48,685 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 16:37:48,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [297998564] [2020-09-04 16:37:48,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:37:48,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-04 16:37:48,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688974732] [2020-09-04 16:37:48,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 16:37:48,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:37:48,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 16:37:48,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-04 16:37:48,688 INFO L87 Difference]: Start difference. First operand 231 states and 254 transitions. Second operand 6 states. [2020-09-04 16:37:49,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:37:49,529 INFO L93 Difference]: Finished difference Result 248 states and 273 transitions. [2020-09-04 16:37:49,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 16:37:49,530 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2020-09-04 16:37:49,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:37:49,533 INFO L225 Difference]: With dead ends: 248 [2020-09-04 16:37:49,533 INFO L226 Difference]: Without dead ends: 244 [2020-09-04 16:37:49,534 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-09-04 16:37:49,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-09-04 16:37:49,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 229. [2020-09-04 16:37:49,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-09-04 16:37:49,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 251 transitions. [2020-09-04 16:37:49,560 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 251 transitions. Word has length 42 [2020-09-04 16:37:49,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:37:49,561 INFO L479 AbstractCegarLoop]: Abstraction has 229 states and 251 transitions. [2020-09-04 16:37:49,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 16:37:49,561 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 251 transitions. [2020-09-04 16:37:49,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-04 16:37:49,562 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:37:49,563 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-04 16:37:49,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 16:37:49,563 INFO L427 AbstractCegarLoop]: === Iteration 5 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:37:49,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:37:49,564 INFO L82 PathProgramCache]: Analyzing trace with hash 527521680, now seen corresponding path program 1 times [2020-09-04 16:37:49,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:37:49,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040889635] [2020-09-04 16:37:49,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:37:49,586 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:37:49,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:37:49,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:37:49,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:37:49,681 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 16:37:49,682 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040889635] [2020-09-04 16:37:49,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:37:49,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-04 16:37:49,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586694967] [2020-09-04 16:37:49,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 16:37:49,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:37:49,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 16:37:49,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-04 16:37:49,685 INFO L87 Difference]: Start difference. First operand 229 states and 251 transitions. Second operand 6 states. [2020-09-04 16:37:50,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:37:50,471 INFO L93 Difference]: Finished difference Result 246 states and 270 transitions. [2020-09-04 16:37:50,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 16:37:50,472 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2020-09-04 16:37:50,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:37:50,475 INFO L225 Difference]: With dead ends: 246 [2020-09-04 16:37:50,475 INFO L226 Difference]: Without dead ends: 242 [2020-09-04 16:37:50,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-09-04 16:37:50,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-09-04 16:37:50,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 227. [2020-09-04 16:37:50,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-09-04 16:37:50,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 248 transitions. [2020-09-04 16:37:50,494 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 248 transitions. Word has length 42 [2020-09-04 16:37:50,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:37:50,494 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 248 transitions. [2020-09-04 16:37:50,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 16:37:50,494 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 248 transitions. [2020-09-04 16:37:50,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-04 16:37:50,495 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:37:50,496 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-04 16:37:50,496 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 16:37:50,496 INFO L427 AbstractCegarLoop]: === Iteration 6 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:37:50,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:37:50,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1598586176, now seen corresponding path program 1 times [2020-09-04 16:37:50,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:37:50,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671927796] [2020-09-04 16:37:50,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:37:50,513 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:37:50,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:37:50,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:37:50,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:37:50,712 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 16:37:50,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671927796] [2020-09-04 16:37:50,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:37:50,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-04 16:37:50,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136453165] [2020-09-04 16:37:50,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 16:37:50,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:37:50,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 16:37:50,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-04 16:37:50,716 INFO L87 Difference]: Start difference. First operand 227 states and 248 transitions. Second operand 10 states. [2020-09-04 16:37:52,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:37:52,029 INFO L93 Difference]: Finished difference Result 299 states and 329 transitions. [2020-09-04 16:37:52,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 16:37:52,030 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2020-09-04 16:37:52,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:37:52,033 INFO L225 Difference]: With dead ends: 299 [2020-09-04 16:37:52,034 INFO L226 Difference]: Without dead ends: 295 [2020-09-04 16:37:52,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-09-04 16:37:52,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-09-04 16:37:52,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 234. [2020-09-04 16:37:52,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-09-04 16:37:52,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 255 transitions. [2020-09-04 16:37:52,058 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 255 transitions. Word has length 46 [2020-09-04 16:37:52,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:37:52,058 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 255 transitions. [2020-09-04 16:37:52,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 16:37:52,059 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 255 transitions. [2020-09-04 16:37:52,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-04 16:37:52,060 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:37:52,060 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-04 16:37:52,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 16:37:52,061 INFO L427 AbstractCegarLoop]: === Iteration 7 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:37:52,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:37:52,061 INFO L82 PathProgramCache]: Analyzing trace with hash 180139286, now seen corresponding path program 1 times [2020-09-04 16:37:52,062 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:37:52,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361425461] [2020-09-04 16:37:52,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:37:52,088 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:37:52,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:37:52,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 16:37:52,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 16:37:52,235 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 16:37:52,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361425461] [2020-09-04 16:37:52,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 16:37:52,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-09-04 16:37:52,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493495318] [2020-09-04 16:37:52,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 16:37:52,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 16:37:52,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 16:37:52,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-09-04 16:37:52,238 INFO L87 Difference]: Start difference. First operand 234 states and 255 transitions. Second operand 10 states. [2020-09-04 16:37:53,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 16:37:53,562 INFO L93 Difference]: Finished difference Result 297 states and 326 transitions. [2020-09-04 16:37:53,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 16:37:53,563 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2020-09-04 16:37:53,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 16:37:53,566 INFO L225 Difference]: With dead ends: 297 [2020-09-04 16:37:53,567 INFO L226 Difference]: Without dead ends: 293 [2020-09-04 16:37:53,567 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-09-04 16:37:53,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-09-04 16:37:53,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 241. [2020-09-04 16:37:53,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-09-04 16:37:53,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 262 transitions. [2020-09-04 16:37:53,590 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 262 transitions. Word has length 46 [2020-09-04 16:37:53,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 16:37:53,591 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 262 transitions. [2020-09-04 16:37:53,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 16:37:53,591 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 262 transitions. [2020-09-04 16:37:53,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-04 16:37:53,592 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 16:37:53,593 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-04 16:37:53,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 16:37:53,593 INFO L427 AbstractCegarLoop]: === Iteration 8 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 16:37:53,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 16:37:53,594 INFO L82 PathProgramCache]: Analyzing trace with hash 797684937, now seen corresponding path program 1 times [2020-09-04 16:37:53,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 16:37:53,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072313808] [2020-09-04 16:37:53,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 16:37:53,615 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 16:37:53,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:37:53,641 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:37:53,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 16:37:53,688 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 16:37:53,742 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 16:37:53,743 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 16:37:53,744 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-04 16:37:53,776 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 04:37:53 BoogieIcfgContainer [2020-09-04 16:37:53,777 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 16:37:53,782 INFO L168 Benchmark]: Toolchain (without parser) took 10474.45 ms. Allocated memory was 140.0 MB in the beginning and 309.9 MB in the end (delta: 169.9 MB). Free memory was 100.9 MB in the beginning and 191.1 MB in the end (delta: -90.2 MB). Peak memory consumption was 79.7 MB. Max. memory is 7.1 GB. [2020-09-04 16:37:53,790 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 140.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 16:37:53,794 INFO L168 Benchmark]: CACSL2BoogieTranslator took 780.91 ms. Allocated memory was 140.0 MB in the beginning and 206.6 MB in the end (delta: 66.6 MB). Free memory was 100.7 MB in the beginning and 170.8 MB in the end (delta: -70.1 MB). Peak memory consumption was 25.0 MB. Max. memory is 7.1 GB. [2020-09-04 16:37:53,795 INFO L168 Benchmark]: Boogie Preprocessor took 98.63 ms. Allocated memory is still 206.6 MB. Free memory was 170.8 MB in the beginning and 166.8 MB in the end (delta: 3.9 MB). Peak memory consumption was 3.9 MB. Max. memory is 7.1 GB. [2020-09-04 16:37:53,796 INFO L168 Benchmark]: RCFGBuilder took 1065.16 ms. Allocated memory was 206.6 MB in the beginning and 237.5 MB in the end (delta: 30.9 MB). Free memory was 166.8 MB in the beginning and 201.4 MB in the end (delta: -34.5 MB). Peak memory consumption was 78.8 MB. Max. memory is 7.1 GB. [2020-09-04 16:37:53,800 INFO L168 Benchmark]: TraceAbstraction took 8523.02 ms. Allocated memory was 237.5 MB in the beginning and 309.9 MB in the end (delta: 72.4 MB). Free memory was 201.4 MB in the beginning and 191.1 MB in the end (delta: 10.2 MB). Peak memory consumption was 82.6 MB. Max. memory is 7.1 GB. [2020-09-04 16:37:53,808 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 140.0 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 780.91 ms. Allocated memory was 140.0 MB in the beginning and 206.6 MB in the end (delta: 66.6 MB). Free memory was 100.7 MB in the beginning and 170.8 MB in the end (delta: -70.1 MB). Peak memory consumption was 25.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 98.63 ms. Allocated memory is still 206.6 MB. Free memory was 170.8 MB in the beginning and 166.8 MB in the end (delta: 3.9 MB). Peak memory consumption was 3.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 1065.16 ms. Allocated memory was 206.6 MB in the beginning and 237.5 MB in the end (delta: 30.9 MB). Free memory was 166.8 MB in the beginning and 201.4 MB in the end (delta: -34.5 MB). Peak memory consumption was 78.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8523.02 ms. Allocated memory was 237.5 MB in the beginning and 309.9 MB in the end (delta: 72.4 MB). Free memory was 201.4 MB in the beginning and 191.1 MB in the end (delta: 10.2 MB). Peak memory consumption was 82.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 554]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L627] struct list *data = ((void *)0); [L628] COND TRUE __VERIFIER_nondet_int() [L629] struct node *node = malloc(sizeof *node); [L630] COND FALSE !(!node) [L632] node->next = node [L633] node->value = __VERIFIER_nondet_int() [L634] struct list *item = malloc(sizeof *item); [L635] COND FALSE !(!item) [L637] item->slist = node [L638] item->next = data [L639] data = item [L628] COND FALSE !(__VERIFIER_nondet_int()) [L641] COND FALSE !(!data) [L643] CALL inspect_before(data) [L604] COND FALSE !(!(shape)) [L605] shape->next [L605] COND FALSE !(shape->next) [L611] COND FALSE !(!(shape)) [L612] EXPR shape->next [L612] COND FALSE !(!(shape->next == ((void *)0))) [L613] EXPR shape->slist [L613] COND FALSE !(!(shape->slist)) [L614] EXPR shape->slist [L614] EXPR shape->slist->next [L614] COND TRUE !(shape->slist->next == ((void *)0)) [L614] CALL fail() [L554] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 11 procedures, 258 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 8.4s, OverallIterations: 8, TraceHistogramMax: 2, AutomataDifference: 6.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1648 SDtfs, 1803 SDslu, 2737 SDs, 0 SdLazy, 4465 SolverSat, 226 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 87 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=248occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 7 MinimizatonAttempts, 280 StatesRemovedByMinimization, 7 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...