/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 0.1.25-72570d3 [2020-08-22 19:03:58,281 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:03:58,283 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:03:58,307 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 19:03:58,307 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 19:03:58,308 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 19:03:58,310 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 19:03:58,312 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 19:03:58,313 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 19:03:58,314 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 19:03:58,315 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 19:03:58,316 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 19:03:58,316 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:03:58,317 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:03:58,318 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:03:58,319 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:03:58,320 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:03:58,321 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:03:58,322 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:03:58,326 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:03:58,329 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:03:58,330 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:03:58,331 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:03:58,332 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:03:58,339 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 19:03:58,339 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 19:03:58,339 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 19:03:58,340 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 19:03:58,341 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 19:03:58,341 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-22 19:03:58,342 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-22 19:03:58,342 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-22 19:03:58,344 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-22 19:03:58,345 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-22 19:03:58,346 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-22 19:03:58,347 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-22 19:03:58,347 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-22 19:03:58,347 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-22 19:03:58,348 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 19:03:58,348 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 19:03:58,350 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 19:03:58,350 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 19:03:58,373 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:03:58,373 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:03:58,374 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:03:58,374 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:03:58,375 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:03:58,375 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:03:58,375 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:03:58,375 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:03:58,375 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:03:58,375 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:03:58,376 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:03:58,376 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:03:58,377 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:03:58,377 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:03:58,377 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:03:58,377 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:03:58,378 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:03:58,378 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:03:58,378 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:03:58,378 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:03:58,378 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:03:58,379 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:03:58,379 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:03:58,676 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:03:58,692 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:03:58,696 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:03:58,697 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:03:58,698 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:03:58,699 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/heap-manipulation/merge_sort-1.i [2020-08-22 19:03:58,764 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e4c6a965/af6b9adf065c4f4d93d7202668a80f7a/FLAGe3baae15b [2020-08-22 19:03:59,279 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:03:59,279 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/heap-manipulation/merge_sort-1.i [2020-08-22 19:03:59,291 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e4c6a965/af6b9adf065c4f4d93d7202668a80f7a/FLAGe3baae15b [2020-08-22 19:03:59,591 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e4c6a965/af6b9adf065c4f4d93d7202668a80f7a [2020-08-22 19:03:59,599 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:03:59,601 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:03:59,602 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:03:59,602 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:03:59,605 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:03:59,606 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:03:59" (1/1) ... [2020-08-22 19:03:59,609 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2a8a0309 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:03:59, skipping insertion in model container [2020-08-22 19:03:59,609 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:03:59" (1/1) ... [2020-08-22 19:03:59,617 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:03:59,677 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:04:00,093 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:04:00,102 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:04:00,155 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:04:00,206 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:04:00,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:04:00 WrapperNode [2020-08-22 19:04:00,207 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:04:00,208 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:04:00,208 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:04:00,208 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:04:00,222 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:04:00" (1/1) ... [2020-08-22 19:04:00,222 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:04:00" (1/1) ... [2020-08-22 19:04:00,241 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:04:00" (1/1) ... [2020-08-22 19:04:00,241 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:04:00" (1/1) ... [2020-08-22 19:04:00,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:04:00" (1/1) ... [2020-08-22 19:04:00,280 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:04:00" (1/1) ... [2020-08-22 19:04:00,284 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:04:00" (1/1) ... [2020-08-22 19:04:00,293 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:04:00,294 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:04:00,294 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:04:00,294 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:04:00,295 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:04:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:04:00,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:04:00,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:04:00,349 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-08-22 19:04:00,349 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-08-22 19:04:00,350 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2020-08-22 19:04:00,350 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_single_node [2020-08-22 19:04:00,350 INFO L138 BoogieDeclarations]: Found implementation of procedure merge_pair [2020-08-22 19:04:00,350 INFO L138 BoogieDeclarations]: Found implementation of procedure seq_sort_core [2020-08-22 19:04:00,350 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_before [2020-08-22 19:04:00,350 INFO L138 BoogieDeclarations]: Found implementation of procedure inspect_after [2020-08-22 19:04:00,350 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:04:00,350 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:04:00,351 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-08-22 19:04:00,351 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-08-22 19:04:00,351 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-08-22 19:04:00,351 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-08-22 19:04:00,351 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-08-22 19:04:00,351 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-08-22 19:04:00,352 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-08-22 19:04:00,352 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-08-22 19:04:00,352 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-08-22 19:04:00,352 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-08-22 19:04:00,352 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-08-22 19:04:00,352 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-08-22 19:04:00,353 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-08-22 19:04:00,353 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-08-22 19:04:00,353 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-08-22 19:04:00,353 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-08-22 19:04:00,353 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-08-22 19:04:00,353 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-08-22 19:04:00,354 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-08-22 19:04:00,354 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-08-22 19:04:00,354 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-08-22 19:04:00,354 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-08-22 19:04:00,354 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-08-22 19:04:00,354 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-08-22 19:04:00,355 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-08-22 19:04:00,355 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-08-22 19:04:00,355 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-08-22 19:04:00,355 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-08-22 19:04:00,355 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-08-22 19:04:00,355 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-08-22 19:04:00,356 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-08-22 19:04:00,356 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-08-22 19:04:00,356 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-08-22 19:04:00,356 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-08-22 19:04:00,356 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-08-22 19:04:00,356 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-08-22 19:04:00,357 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-08-22 19:04:00,357 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-08-22 19:04:00,357 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-08-22 19:04:00,357 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-08-22 19:04:00,357 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-08-22 19:04:00,357 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-08-22 19:04:00,357 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-08-22 19:04:00,358 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-08-22 19:04:00,358 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-08-22 19:04:00,358 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-08-22 19:04:00,358 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-08-22 19:04:00,358 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-08-22 19:04:00,358 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-08-22 19:04:00,359 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-08-22 19:04:00,359 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-08-22 19:04:00,359 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-08-22 19:04:00,359 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 19:04:00,359 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-08-22 19:04:00,359 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-08-22 19:04:00,360 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-08-22 19:04:00,360 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-08-22 19:04:00,360 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-08-22 19:04:00,360 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-08-22 19:04:00,360 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-08-22 19:04:00,360 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 19:04:00,360 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-08-22 19:04:00,361 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-08-22 19:04:00,361 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-08-22 19:04:00,361 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-08-22 19:04:00,361 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-08-22 19:04:00,361 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-08-22 19:04:00,361 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-08-22 19:04:00,362 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-08-22 19:04:00,362 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-08-22 19:04:00,362 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-08-22 19:04:00,362 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-08-22 19:04:00,362 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-08-22 19:04:00,362 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-08-22 19:04:00,363 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-08-22 19:04:00,363 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-08-22 19:04:00,363 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-08-22 19:04:00,363 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-08-22 19:04:00,363 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-08-22 19:04:00,363 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-08-22 19:04:00,364 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-08-22 19:04:00,364 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-08-22 19:04:00,364 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-08-22 19:04:00,364 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-08-22 19:04:00,364 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-08-22 19:04:00,364 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-08-22 19:04:00,365 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-08-22 19:04:00,365 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-08-22 19:04:00,365 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-08-22 19:04:00,365 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-08-22 19:04:00,365 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-08-22 19:04:00,365 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-08-22 19:04:00,365 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-08-22 19:04:00,366 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-08-22 19:04:00,366 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-08-22 19:04:00,366 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-08-22 19:04:00,366 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-08-22 19:04:00,366 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-08-22 19:04:00,366 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-08-22 19:04:00,366 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-08-22 19:04:00,367 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-08-22 19:04:00,367 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-08-22 19:04:00,367 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 19:04:00,367 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2020-08-22 19:04:00,367 INFO L130 BoogieDeclarations]: Found specification of procedure merge_single_node [2020-08-22 19:04:00,367 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 19:04:00,367 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 19:04:00,368 INFO L130 BoogieDeclarations]: Found specification of procedure merge_pair [2020-08-22 19:04:00,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 19:04:00,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 19:04:00,368 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 19:04:00,368 INFO L130 BoogieDeclarations]: Found specification of procedure seq_sort_core [2020-08-22 19:04:00,368 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_before [2020-08-22 19:04:00,369 INFO L130 BoogieDeclarations]: Found specification of procedure inspect_after [2020-08-22 19:04:00,369 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:04:00,369 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 19:04:00,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 19:04:00,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:04:00,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:04:01,191 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:04:01,192 INFO L295 CfgBuilder]: Removed 33 assume(true) statements. [2020-08-22 19:04:01,197 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:04:01 BoogieIcfgContainer [2020-08-22 19:04:01,197 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:04:01,198 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:04:01,199 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:04:01,202 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:04:01,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:03:59" (1/3) ... [2020-08-22 19:04:01,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5281ee9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:04:01, skipping insertion in model container [2020-08-22 19:04:01,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:04:00" (2/3) ... [2020-08-22 19:04:01,203 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5281ee9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:04:01, skipping insertion in model container [2020-08-22 19:04:01,203 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:04:01" (3/3) ... [2020-08-22 19:04:01,205 INFO L109 eAbstractionObserver]: Analyzing ICFG merge_sort-1.i [2020-08-22 19:04:01,215 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:04:01,223 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:04:01,236 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:04:01,257 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:04:01,257 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:04:01,258 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:04:01,258 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:04:01,258 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:04:01,258 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:04:01,259 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:04:01,259 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:04:01,278 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states. [2020-08-22 19:04:01,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-22 19:04:01,288 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:04:01,289 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:04:01,290 INFO L427 AbstractCegarLoop]: === Iteration 1 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:04:01,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:04:01,296 INFO L82 PathProgramCache]: Analyzing trace with hash -2091922853, now seen corresponding path program 1 times [2020-08-22 19:04:01,304 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:04:01,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555330066] [2020-08-22 19:04:01,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:04:01,370 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:04:01,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:04:01,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:04:01,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:04:01,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:04:01,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555330066] [2020-08-22 19:04:01,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:04:01,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 19:04:01,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384248813] [2020-08-22 19:04:01,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 19:04:01,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:04:01,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 19:04:01,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:04:01,505 INFO L87 Difference]: Start difference. First operand 248 states. Second operand 3 states. [2020-08-22 19:04:01,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:04:01,896 INFO L93 Difference]: Finished difference Result 521 states and 689 transitions. [2020-08-22 19:04:01,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 19:04:01,897 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-08-22 19:04:01,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:04:01,912 INFO L225 Difference]: With dead ends: 521 [2020-08-22 19:04:01,912 INFO L226 Difference]: Without dead ends: 252 [2020-08-22 19:04:01,920 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 [2020-08-22 19:04:01,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-08-22 19:04:01,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 224. [2020-08-22 19:04:01,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-08-22 19:04:01,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 247 transitions. [2020-08-22 19:04:01,996 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 247 transitions. Word has length 15 [2020-08-22 19:04:01,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:04:01,997 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 247 transitions. [2020-08-22 19:04:01,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 19:04:01,997 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 247 transitions. [2020-08-22 19:04:01,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-22 19:04:01,998 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:04:01,998 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:04:01,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:04:01,999 INFO L427 AbstractCegarLoop]: === Iteration 2 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:04:01,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:04:01,999 INFO L82 PathProgramCache]: Analyzing trace with hash 2028933562, now seen corresponding path program 1 times [2020-08-22 19:04:02,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:04:02,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19729199] [2020-08-22 19:04:02,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:04:02,005 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:04:02,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:04:02,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:04:02,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:04:02,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:04:02,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19729199] [2020-08-22 19:04:02,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:04:02,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 19:04:02,072 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387373315] [2020-08-22 19:04:02,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 19:04:02,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:04:02,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 19:04:02,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 19:04:02,074 INFO L87 Difference]: Start difference. First operand 224 states and 247 transitions. Second operand 4 states. [2020-08-22 19:04:02,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:04:02,531 INFO L93 Difference]: Finished difference Result 453 states and 502 transitions. [2020-08-22 19:04:02,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 19:04:02,531 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-08-22 19:04:02,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:04:02,534 INFO L225 Difference]: With dead ends: 453 [2020-08-22 19:04:02,535 INFO L226 Difference]: Without dead ends: 253 [2020-08-22 19:04:02,537 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 [2020-08-22 19:04:02,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-08-22 19:04:02,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 226. [2020-08-22 19:04:02,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-08-22 19:04:02,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 249 transitions. [2020-08-22 19:04:02,563 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 249 transitions. Word has length 17 [2020-08-22 19:04:02,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:04:02,564 INFO L479 AbstractCegarLoop]: Abstraction has 226 states and 249 transitions. [2020-08-22 19:04:02,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 19:04:02,564 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 249 transitions. [2020-08-22 19:04:02,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 19:04:02,565 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:04:02,565 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] [2020-08-22 19:04:02,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:04:02,566 INFO L427 AbstractCegarLoop]: === Iteration 3 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:04:02,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:04:02,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1052511289, now seen corresponding path program 1 times [2020-08-22 19:04:02,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:04:02,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413932899] [2020-08-22 19:04:02,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:04:02,611 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:04:02,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:04:02,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:04:02,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:04:02,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:04:02,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413932899] [2020-08-22 19:04:02,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:04:02,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-08-22 19:04:02,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505674345] [2020-08-22 19:04:02,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 19:04:02,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:04:02,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 19:04:02,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-22 19:04:02,787 INFO L87 Difference]: Start difference. First operand 226 states and 249 transitions. Second operand 9 states. [2020-08-22 19:04:03,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:04:03,705 INFO L93 Difference]: Finished difference Result 318 states and 355 transitions. [2020-08-22 19:04:03,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 19:04:03,705 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-08-22 19:04:03,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:04:03,711 INFO L225 Difference]: With dead ends: 318 [2020-08-22 19:04:03,711 INFO L226 Difference]: Without dead ends: 313 [2020-08-22 19:04:03,712 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 [2020-08-22 19:04:03,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-08-22 19:04:03,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 231. [2020-08-22 19:04:03,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-08-22 19:04:03,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 254 transitions. [2020-08-22 19:04:03,761 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 254 transitions. Word has length 33 [2020-08-22 19:04:03,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:04:03,763 INFO L479 AbstractCegarLoop]: Abstraction has 231 states and 254 transitions. [2020-08-22 19:04:03,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 19:04:03,764 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 254 transitions. [2020-08-22 19:04:03,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-22 19:04:03,765 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:04:03,765 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] [2020-08-22 19:04:03,766 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 19:04:03,769 INFO L427 AbstractCegarLoop]: === Iteration 4 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:04:03,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:04:03,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1386814406, now seen corresponding path program 1 times [2020-08-22 19:04:03,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:04:03,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248472284] [2020-08-22 19:04:03,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:04:03,798 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:04:03,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:04:03,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:04:03,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:04:03,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:04:03,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248472284] [2020-08-22 19:04:03,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:04:03,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 19:04:03,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007386406] [2020-08-22 19:04:03,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 19:04:03,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:04:03,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 19:04:03,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:04:03,915 INFO L87 Difference]: Start difference. First operand 231 states and 254 transitions. Second operand 6 states. [2020-08-22 19:04:04,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:04:04,541 INFO L93 Difference]: Finished difference Result 248 states and 273 transitions. [2020-08-22 19:04:04,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 19:04:04,542 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2020-08-22 19:04:04,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:04:04,544 INFO L225 Difference]: With dead ends: 248 [2020-08-22 19:04:04,544 INFO L226 Difference]: Without dead ends: 244 [2020-08-22 19:04:04,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-08-22 19:04:04,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-08-22 19:04:04,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 229. [2020-08-22 19:04:04,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-08-22 19:04:04,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 251 transitions. [2020-08-22 19:04:04,565 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 251 transitions. Word has length 42 [2020-08-22 19:04:04,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:04:04,565 INFO L479 AbstractCegarLoop]: Abstraction has 229 states and 251 transitions. [2020-08-22 19:04:04,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 19:04:04,565 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 251 transitions. [2020-08-22 19:04:04,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-22 19:04:04,567 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:04:04,567 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] [2020-08-22 19:04:04,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 19:04:04,567 INFO L427 AbstractCegarLoop]: === Iteration 5 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:04:04,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:04:04,568 INFO L82 PathProgramCache]: Analyzing trace with hash 527521680, now seen corresponding path program 1 times [2020-08-22 19:04:04,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:04:04,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69164681] [2020-08-22 19:04:04,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:04:04,587 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:04:04,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:04:04,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:04:04,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:04:04,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:04:04,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69164681] [2020-08-22 19:04:04,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:04:04,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 19:04:04,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232436249] [2020-08-22 19:04:04,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 19:04:04,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:04:04,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 19:04:04,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:04:04,660 INFO L87 Difference]: Start difference. First operand 229 states and 251 transitions. Second operand 6 states. [2020-08-22 19:04:05,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:04:05,301 INFO L93 Difference]: Finished difference Result 246 states and 270 transitions. [2020-08-22 19:04:05,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 19:04:05,302 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 42 [2020-08-22 19:04:05,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:04:05,305 INFO L225 Difference]: With dead ends: 246 [2020-08-22 19:04:05,306 INFO L226 Difference]: Without dead ends: 242 [2020-08-22 19:04:05,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-08-22 19:04:05,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-08-22 19:04:05,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 227. [2020-08-22 19:04:05,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-08-22 19:04:05,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 248 transitions. [2020-08-22 19:04:05,327 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 248 transitions. Word has length 42 [2020-08-22 19:04:05,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:04:05,327 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 248 transitions. [2020-08-22 19:04:05,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 19:04:05,328 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 248 transitions. [2020-08-22 19:04:05,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-22 19:04:05,329 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:04:05,329 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] [2020-08-22 19:04:05,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 19:04:05,329 INFO L427 AbstractCegarLoop]: === Iteration 6 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:04:05,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:04:05,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1598586176, now seen corresponding path program 1 times [2020-08-22 19:04:05,330 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:04:05,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978924571] [2020-08-22 19:04:05,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:04:05,352 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:04:05,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:04:05,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:04:05,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:04:05,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:04:05,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978924571] [2020-08-22 19:04:05,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:04:05,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 19:04:05,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19938889] [2020-08-22 19:04:05,523 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 19:04:05,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:04:05,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 19:04:05,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-22 19:04:05,524 INFO L87 Difference]: Start difference. First operand 227 states and 248 transitions. Second operand 10 states. [2020-08-22 19:04:06,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:04:06,589 INFO L93 Difference]: Finished difference Result 299 states and 329 transitions. [2020-08-22 19:04:06,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 19:04:06,590 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2020-08-22 19:04:06,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:04:06,592 INFO L225 Difference]: With dead ends: 299 [2020-08-22 19:04:06,592 INFO L226 Difference]: Without dead ends: 295 [2020-08-22 19:04:06,593 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 [2020-08-22 19:04:06,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-08-22 19:04:06,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 234. [2020-08-22 19:04:06,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-08-22 19:04:06,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 255 transitions. [2020-08-22 19:04:06,631 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 255 transitions. Word has length 46 [2020-08-22 19:04:06,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:04:06,632 INFO L479 AbstractCegarLoop]: Abstraction has 234 states and 255 transitions. [2020-08-22 19:04:06,632 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 19:04:06,632 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 255 transitions. [2020-08-22 19:04:06,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-22 19:04:06,633 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:04:06,634 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] [2020-08-22 19:04:06,634 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 19:04:06,634 INFO L427 AbstractCegarLoop]: === Iteration 7 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:04:06,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:04:06,634 INFO L82 PathProgramCache]: Analyzing trace with hash 180139286, now seen corresponding path program 1 times [2020-08-22 19:04:06,635 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:04:06,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425669270] [2020-08-22 19:04:06,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:04:06,649 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:04:06,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:04:06,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:04:06,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:04:06,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:04:06,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425669270] [2020-08-22 19:04:06,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:04:06,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 19:04:06,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121876627] [2020-08-22 19:04:06,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 19:04:06,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:04:06,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 19:04:06,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-22 19:04:06,749 INFO L87 Difference]: Start difference. First operand 234 states and 255 transitions. Second operand 10 states. [2020-08-22 19:04:07,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:04:07,715 INFO L93 Difference]: Finished difference Result 297 states and 326 transitions. [2020-08-22 19:04:07,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 19:04:07,716 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2020-08-22 19:04:07,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:04:07,718 INFO L225 Difference]: With dead ends: 297 [2020-08-22 19:04:07,718 INFO L226 Difference]: Without dead ends: 293 [2020-08-22 19:04:07,719 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 [2020-08-22 19:04:07,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-08-22 19:04:07,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 241. [2020-08-22 19:04:07,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-08-22 19:04:07,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 262 transitions. [2020-08-22 19:04:07,743 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 262 transitions. Word has length 46 [2020-08-22 19:04:07,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:04:07,743 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 262 transitions. [2020-08-22 19:04:07,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 19:04:07,744 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 262 transitions. [2020-08-22 19:04:07,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-22 19:04:07,745 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:04:07,745 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] [2020-08-22 19:04:07,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 19:04:07,745 INFO L427 AbstractCegarLoop]: === Iteration 8 === [failErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:04:07,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:04:07,746 INFO L82 PathProgramCache]: Analyzing trace with hash 797684937, now seen corresponding path program 1 times [2020-08-22 19:04:07,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:04:07,746 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135946099] [2020-08-22 19:04:07,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:04:07,760 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:04:07,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 19:04:07,795 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 19:04:07,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 19:04:07,824 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 19:04:07,871 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 19:04:07,871 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 19:04:07,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 19:04:07,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 07:04:07 BoogieIcfgContainer [2020-08-22 19:04:07,897 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 19:04:07,900 INFO L168 Benchmark]: Toolchain (without parser) took 8298.16 ms. Allocated memory was 137.9 MB in the beginning and 327.7 MB in the end (delta: 189.8 MB). Free memory was 100.2 MB in the beginning and 88.9 MB in the end (delta: 11.4 MB). Peak memory consumption was 201.2 MB. Max. memory is 7.1 GB. [2020-08-22 19:04:07,906 INFO L168 Benchmark]: CDTParser took 0.77 ms. Allocated memory is still 137.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 19:04:07,908 INFO L168 Benchmark]: CACSL2BoogieTranslator took 605.83 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 100.0 MB in the beginning and 162.3 MB in the end (delta: -62.2 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. [2020-08-22 19:04:07,909 INFO L168 Benchmark]: Boogie Preprocessor took 85.45 ms. Allocated memory is still 200.8 MB. Free memory was 162.3 MB in the beginning and 158.5 MB in the end (delta: 3.7 MB). Peak memory consumption was 3.7 MB. Max. memory is 7.1 GB. [2020-08-22 19:04:07,910 INFO L168 Benchmark]: RCFGBuilder took 903.73 ms. Allocated memory was 200.8 MB in the beginning and 232.3 MB in the end (delta: 31.5 MB). Free memory was 158.5 MB in the beginning and 195.8 MB in the end (delta: -37.3 MB). Peak memory consumption was 79.4 MB. Max. memory is 7.1 GB. [2020-08-22 19:04:07,914 INFO L168 Benchmark]: TraceAbstraction took 6698.53 ms. Allocated memory was 232.3 MB in the beginning and 327.7 MB in the end (delta: 95.4 MB). Free memory was 194.4 MB in the beginning and 88.9 MB in the end (delta: 105.5 MB). Peak memory consumption was 200.9 MB. Max. memory is 7.1 GB. [2020-08-22 19:04:07,925 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.77 ms. Allocated memory is still 137.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 605.83 ms. Allocated memory was 137.9 MB in the beginning and 200.8 MB in the end (delta: 62.9 MB). Free memory was 100.0 MB in the beginning and 162.3 MB in the end (delta: -62.2 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 85.45 ms. Allocated memory is still 200.8 MB. Free memory was 162.3 MB in the beginning and 158.5 MB in the end (delta: 3.7 MB). Peak memory consumption was 3.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 903.73 ms. Allocated memory was 200.8 MB in the beginning and 232.3 MB in the end (delta: 31.5 MB). Free memory was 158.5 MB in the beginning and 195.8 MB in the end (delta: -37.3 MB). Peak memory consumption was 79.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6698.53 ms. Allocated memory was 232.3 MB in the beginning and 327.7 MB in the end (delta: 95.4 MB). Free memory was 194.4 MB in the beginning and 88.9 MB in the end (delta: 105.5 MB). Peak memory consumption was 200.9 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: 6.6s, OverallIterations: 8, TraceHistogramMax: 2, AutomataDifference: 5.1s, 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, 3.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 87 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.6s 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...